Tootfinder

Octopus Heat-pump Journey - Via quote and survey and negotiation to keeping us warm fossil-free #heatPump #DHW #spaceHeat

Octopus Heat-pump Journey
Via quote and survey and negotiation to keeping us warm fossil-free #heatPump #DHW #spaceHeat #defossilisation

Yes, the "National Energy Dominance Council" is dumb and just...silly.
But this? This is utterly cretinous. (Via @…) Reality-free propaganda from top to bottom.

AIBA: Attention-based Instrument Band Alignment for Text-to-Audio Diffusion
Junyoung Koh, Soo Yong Kim, Gyu Hyeong Choi, Yongwon Choi
https://arxiv.org/abs/2509.20891 https://…

AIBA: Attention-based Instrument Band Alignment for Text-to-Audio Diffusion
We present AIBA (Attention-In-Band Alignment), a lightweight, training-free pipeline to quantify where text-to-audio diffusion models attend on the time-frequency (T-F) plane. AIBA (i) hooks cross-attention at inference to record attention probabilities without modifying weights; (ii) projects them to fixed-size mel grids that are directly comparable to audio energy; and (iii) scores agreement with instrument-band ground truth via interpretable metrics (T-F IoU/AP, frequency-profile correlation…

Crosslisted article(s) found for physics.optics. https://arxiv.org/list/physics.optics/new
[1/1]:
- Robot joint characterisation and control using a magneto-optical rotary encoder
Yunlong Guo, John Canning, Zenon Chaczko, Gang-Ding Peng
https://arxiv.org/abs/2511.17608 https://mastoxiv.page/@arXiv_csRO_bot/115609561523131866
- Comprehensive Multimodal and Multiscale Analysis of Alzheimer Disease in 5xFAD Mice: Optical Spec...
Solanki, Apachigawo, Khan, Maity, Alharthi, Nasim, Poshtiri, Sweety, Xiao, Khan, Pradhan
https://arxiv.org/abs/2511.18320 https://mastoxiv.page/@arXiv_physicsmedph_bot/115609269625501897
- Stable multipole solitons in defocusing saturable media with an annular trapping potential
Xiaoli Lang, Boris A. Malomed, Liangwei Dong
https://arxiv.org/abs/2511.18356 https://mastoxiv.page/@arXiv_nlinPS_bot/115609515016328541
- High-Accuracy Material Classification via Reference-Free Terahertz Spectroscopy: Revisiting Spect...
Mathias Hedegaard Kristensen, Pawe{\l} Piotr Cielecki, Esben Skovsen
https://arxiv.org/abs/2511.18572 https://mastoxiv.page/@arXiv_physicsappph_bot/115609324247942112
- Observation of Dicke cooperativity between strongly coupled phonons and crystal-field excitations...
Fangliang Wu, Xiaoxuan Ma, Zhongwei Zhang, Motoaki Bamba, Jian Sun, Yuan Wan, Shixun Cao, Qi Zhang
https://arxiv.org/abs/2511.18862 https://mastoxiv.page/@arXiv_condmatmtrlsci_bot/115609901666309913
- Strong Energy Dependent Transition Radiation in a Photonic Crystal
V. Gareyan, Zh. Gevorkian
https://arxiv.org/abs/2511.18863 https://mastoxiv.page/@arXiv_physicsaccph_bot/115609494674308155
- 3M-TI: High-Quality Mobile Thermal Imaging via Calibration-free Multi-Camera Cross-Modal Diffusion
Minchong Chen, Xiaoyun Yuan, Junzhe Wan, Jianing Zhang, Jun Zhang
https://arxiv.org/abs/2511.19117 https://mastoxiv.page/@arXiv_csCV_bot/115610498715181168
toXiv_bot_toot

Reminder: It was Netanyahu who ended the previous ceasefire, 6 months ago, presumably with Trump's permission.
https://apnews.com/article/israel-pale

Why Netanyahu ended the Gaza ceasefire with surprise strikes
The wave of Israeli strikes that killed hundreds of Palestinians across the Gaza Strip early Tuesday was the culmination of Prime Minister Benjamin Netanyahu’s efforts to get out of the ceasefire with Hamas that he agreed to in January. Since the start of the war, Netanyahu has faced dueling, possibly incompatible pressures. Families of the hostages want him to cut a deal with Hamas to free them. His far-right coalition partners want to continue the war with the aim of annihilating the milita…

Octopus Heat-pump Journey - Via quote and survey and negotiation to keeping us warm fossil-free #heatPump #DHW #spaceHeat

Octopus Heat-pump Journey
Via quote and survey and negotiation to keeping us warm fossil-free #heatPump #DHW #spaceHeat #defossilisation

Thermodynamics of quantum processes: An operational framework for free energy and reversible athermality
Himanshu Badhani, Dhanuja G S, Siddhartha Das
https://arxiv.org/abs/2510.12790

Thermodynamics of quantum processes: An operational framework for free energy and reversible athermality
We explore the thermodynamics of quantum processes (quantum channels) by axiomatically introducing the free energy for channels, defined via the quantum relative entropy with an absolutely thermal channel whose fixed output is in equilibrium with a thermal reservoir. This definition finds strong support through its operational interpretations in designated quantum information and thermodynamic tasks. We construct a resource theory of athermality for quantum processes, where free operations are …

Bridging Quantum Computing and Nuclear Structure: Atomic Nuclei on a Trapped-Ion Quantum Computer
Sota Yoshida, Takeshi Sato, Takumi Ogata, Masaaki Kimura
https://arxiv.org/abs/2509.20642

Bridging Quantum Computing and Nuclear Structure: Atomic Nuclei on a Trapped-Ion Quantum Computer
We report accurate quantum simulations of medium-mass atomic nuclei -including oxygen, calcium, and nickel- on the RIKEN-Quantinuum Reimei trapped-ion quantum computer, achieving sub-percent accuracy. Using a symmetry-aware pair-unitary coupled-cluster doubles (pUCCD) ansatz implemented with a hard-core-boson mapping, and with particle-number-restoring post-selection, our ground-state energy estimates agree with noise-free statevector simulations and with exact diagonalization results on the or…

“Google also announced the expansion of its 24/7 Carbon-Free Energy (CFE) partnership with Engie in Germany [..] now scaling up to contribute to Germany's energy transition and grid stability.
[..] Google's German operations are projected to run at or near 85% carbon-free energy in 2026.”

Google Announces €5.5 Billion Investment in Germany, including AI Infrastructure, through 2029
BERLIN — November 11, 2025 — Google today announced a new €5.5 billion investment (2026-2029) in infrastructure and offices in Germany — including a new data center in Dietzenbach,...

"Ireland expands scheme offering free solar systems to the medically vulnerable"
#Ireland #SolarPower #Energy #Renewables

Ireland expands scheme offering free solar systems to the medically vulnerable
The Solar PV Scheme for Medically Vulnerable Customers covers all homeowners dependent on electrically powered medical equipment regardless of their energy supplier. It includes a 2 kW solar PV system and around 470 homes have benefited to date.

Minima and Critical Points of the Bethe Free Energy Are Invariant Under Deformation Retractions of Factor Graphs
Gr\'egoire Sergeant-Perthuis, L\'eo Boitel
https://arxiv.org/abs/2510.05380

Minima and Critical Points of the Bethe Free Energy Are Invariant Under Deformation Retractions of Factor Graphs
In graphical models, factor graphs, and more generally energy-based models, the interactions between variables are encoded by a graph, a hypergraph, or, in the most general case, a partially ordered set (poset). Inference on such probabilistic models cannot be performed exactly due to cycles in the underlying structures of interaction. Instead, one resorts to approximate variational inference by optimizing the Bethe free energy. Critical points of the Bethe free energy correspond to fixed point…

“the only way is up!”
Good morning!
(High energy courtesy of jet lag and my urban hipster hotel in Berlin that has a free coffee machine)

⛽ Yale Scientists Crack the Code on Turning Plastic Waste Into Fuel
https://oilprice.com/Energy/Energy-General/Yale-Scientists-Crack-the-Code-on-Turning-Plastic-Waste-Into-Fuel.html

Yale Scientists Crack the Code on Turning Plastic Waste Into Fuel
Yale scientists have developed a catalyst-free, energy-efficient pyrolysis reactor that converts plastic waste into usable fuel with unprecedented efficiency.

Eco Puzzler: 0-GHG Energy - For those on their way to mastering engineering... How to create a 100% Greenhouse Gas Free Energy System for the UK? #ecoEngineering #renewables -

Eco Puzzler: 0-GHG Energy
For those on their way to mastering engineering... How to create a 100% Greenhouse Gas Free Energy System for the UK? #ecoEngineering #renewables

Hydration Free Energies of Linear Alkanes: Evaluating and Correcting Classical Force Field Predictions with Different Water Models
Yalda Ramezani, Sumit Sharma
https://arxiv.org/abs/2510.09900

Hydration Free Energies of Linear Alkanes: Evaluating and Correcting Classical Force Field Predictions with Different Water Models
Common force fields tend to overestimate the hydration free energies of hydrophobic solutes, leading to an exaggerated hydrophobic effect. We compute the hydration free energies of linear alkanes from methane to eicosane (C$_{20}$H$_{42}$) using free energy perturbation with various three-site (SPC/E, OPC3) and four-site (TIP4P/2005, OPC) water models and the TraPPE-UA force field for alkanes. All water models overestimate the hydration free energies, though the four-site models perform better …

Constraints on the interacting holographic dark energy models: implications from background and perturbations data
N. Nazari Pooya
https://arxiv.org/abs/2510.08875 https://

Constraints on the interacting holographic dark energy models: implications from background and perturbations data
In this study, we employ a two-step method to analyze models of holographic dark energy (HDE) and interacting holographic dark energy (IHDE), incorporating three distinct dark energy (DE)-dark matter (DM) interaction terms. First, using the latest background dataset, we conduct a Markov chain Monte Carlo (MCMC) analysis to constrain the free parameters of the models. Then, we assess the models against each other using the key background parameters and compare them to the $Λ$CDM standard model.…

A Conformal Prediction-Based Chance-Constrained Programming Approach for 24/7 Carbon-Free Data Center Operation Scheduling
Yijie Yang, Jian Shi, Dan Wang, Chenye Wu, Zhu Han
https://arxiv.org/abs/2510.04053

A Conformal Prediction-Based Chance-Constrained Programming Approach for 24/7 Carbon-Free Data Center Operation Scheduling
The rapid growth of AI applications is dramatically increasing data center energy demand, exacerbating carbon emissions, and necessitating a shift towards 24/7 carbon-free energy (CFE). Unlike traditional annual energy matching, 24/7 CFE requires matching real-time electricity consumption with clean energy generation every hour, presenting significant challenges due to the inherent variability and forecasting errors of renewable energy sources. Traditional robust and data-driven optimization me…

Octopus Heat-pump Journey - Via quote and survey and negotiation to keeping us warm fossil-free #heatPump #DHW #spaceHeat

Octopus Heat-pump Journey
Via quote and survey and negotiation to keeping us warm fossil-free #heatPump #DHW #spaceHeat #defossilisation

Free-energy variations for determinantal 2D plasmas with holes
Nicolas Rougerie (UMPA-ENSL)
https://arxiv.org/abs/2510.01745 https://arxiv.org/pdf/2510.017…

Free-energy variations for determinantal 2D plasmas with holes
We study the Gibbs equilibrium of a classical 2D Coulomb gas in the determinantal case = 2. The external potential is the sum of a quadratic term and the potential generated by individual charges pinned in several extended groups. This leads to an equilibrium measure (droplet) with flat density and macroscopic holes. We consider ''correlation energy'' (free energy minus its mean-field approximation) expansions, for large particle number . Under the assumptions that the holes are sufficiently sm…

Understanding How Synthetic Impurities Affect Glyphosate Solubility and Crystal Growth Using Free Energy Calculations and Molecular Dynamics Simulations
Alejandro Castro, Nuria H. Espejo, Ignacio Sanchez-Burgos, Adiran Garaizar, Giovanni Maria Maggioni, Jorge R. Espinosa
https://arxiv.org/abs/2510.09413

Understanding How Synthetic Impurities Affect Glyphosate Solubility and Crystal Growth Using Free Energy Calculations and Molecular Dynamics Simulations
Glyphosate, the most widely used herbicide worldwide, crystallizes through complex intermolecular interactions that are strongly influenced by synthesis-derived impurities. Understanding this process at the molecular scale is critical for optimizing production, ensuring product quality, and assessing environmental impact. Here, we employ direct coexistence molecular dynamics simulations and free energy calculations to elucidate how glycine-a prevalent synthesis byproduct-modulates glyphosate so…

Effective Free Energy Landscapes and Hawking-Page Transitions
Choon-Lin Ho
https://arxiv.org/abs/2509.25039 https://arxiv.org/pdf/2509.25039

Effective Free Energy Landscapes and Hawking-Page Transitions
A recent interesting development on the dynamics of black hole phase transitions, the Hawking-Page transition, has been the so-called Gibbs free energy landscape approach. In this formalism, it is assumed that there exists a canonical ensemble of a series of black hole spacetimes with arbitrary horizon radius at a given ensemble temperature. An off-shell Gibbs free energy is defined for every spacetime state in the ensemble, with the horizon radius treated as the order parameter. The minima (ma…

Bridging integrated information theory and the free-energy principle in living neuronal networks
Teruki Mayama, Sota Shimizu, Yuki Takano, Dai Akita, Hirokazu Takahashi
https://arxiv.org/abs/2510.04084

Bridging integrated information theory and the free-energy principle in living neuronal networks
The relationship between Integrated Information Theory (IIT) and the Free-Energy Principle (FEP) remains unresolved, particularly with respect to how integrated information, proposed as the intrinsic substrate of consciousness, behaves within variational Bayesian inference. We investigated this issue using dissociated neuronal cultures, previously shown to perform perceptual inference consistent with the FEP. Repeated stimulation from hidden sources induced robust source selectivity: variationa…

The dawn of alchemical free-energy methods in biomolecular simulations
Daniele Macuglia, Giovanni Ciccotti, Beno\^it Roux
https://arxiv.org/abs/2510.04917 https://

The dawn of alchemical free-energy methods in biomolecular simulations
From the onset of fundamental statistical mechanical constructs formulated in the late 19th century, alchemical free-energy methods slowly emerged and transitioned to become operational tools of biomolecular simulation applicable to a wide range of problems including protein-ligand binding for drug discovery research. This article reconstructs how statistical mechanical approaches such as thermodynamic integration and free-energy perturbation were reconfigured in the early 1980's to address the…

Ambient-Stable Transfer-Free Graphdiyne Wafers with Superhigh Hole Mobility at Room Temperature
Beining Ma, Jianyuan Qi, Xinghai Shen
https://arxiv.org/abs/2510.09998 https://…

Ambient-Stable Transfer-Free Graphdiyne Wafers with Superhigh Hole Mobility at Room Temperature
Graphdiyne (GDY) is recognized as a compelling candidate for the fabrication of next-generation high-speed low-energy electronic devices due to its inherent p-type semiconductor characteristics. However, the development of GDY for applications in field-effect transistors (FETs), complementary metal-oxide-semiconductor (CMOS), and logic devices remains constrained by the relatively low carrier mobility reported in current experimental studies. Herein, the synthesis of layer-controlled hydrogen-s…

A log-free estimate for the diagonal paraproduct high $\times$ high $\to$ low in the 3D Navier-Stokes equation
Pylyp Cherevan
https://arxiv.org/abs/2510.07848 https://

A log-free estimate for the diagonal paraproduct high x high -> low in the 3D Navier-Stokes equation
We consider the diagonal paraproduct arising in the nonlinearity (u * grad) u for the three-dimensional Navier-Stokes equations. On scale-critical windows and in the range 1/6 < delta <= 5/8 we obtain a log-free estimate at the level L^2_t H^-1_x for the projection P_{< N^(1-delta)} div(u_N otimes v_N), consistent with the critical energy scheme. The main tools are phase-geometric integration, anisotropic local estimates on cylinders, and bilinear ell^2 decoupling on a finite-rank surface; the …

"Spain has broken the ruinous link between power prices and volatile fossil fuels, something its European neighbours are desperate to do. Spain risks sliding back into costly gas reliance amid post-blackout fears. Boosting grids and batteries will help Spain break free from fossil dependency for good."
It looks like the link is only partially broken, not through planning but due to scale.
Decoupled: how Spain cut the link between gas and power prices using

Decoupled: how Spain cut the link between gas and power prices using renewables | Ember
Spain has some of the lowest wholesale electricity prices in Europe, largely owing to the country’s strong solar and wind growth which reduced the influence of expensive coal and gas power on the electricity market.

One-DoF Robotic Design of Overconstrained Limbs with Energy-Efficient, Self-Collision-Free Motion
Yuping Gu, Bangchao Huang, Haoran Sun, Ronghan Xu, Jiayi Yin, Wei Zhang, Fang Wan, Jia Pan, Chaoyang Song
https://arxiv.org/abs/2509.22002

One-DoF Robotic Design of Overconstrained Limbs with Energy-Efficient, Self-Collision-Free Motion
While it is expected to build robotic limbs with multiple degrees of freedom (DoF) inspired by nature, a single DoF design remains fundamental, providing benefits that include, but are not limited to, simplicity, robustness, cost-effectiveness, and efficiency. Mechanisms, especially those with multiple links and revolute joints connected in closed loops, play an enabling factor in introducing motion diversity for 1-DoF systems, which are usually constrained by self-collision during a full-cycle…

Interesting offer:
https://www.lloydsbankinggroup.com/media/press-releases/2025/lloyds-bank-2025/get-a-heat-pump-on-lloyds.html
Free heatpump with a Lloyds mortgage...

@… laufen eure Server mit Ökostrom?
https://www.thegreenwebfoundation.org/tools/green-web-dataset/get-verified/

Field Free Spin-Orbit Torque Controlled Synapse and Stochastic Neuron Devices for Spintronic Boltzmann Neural Networks
Aijaz H. Lone, Meng Tang, Camelia Florica, Bin He, Jingkai Xu, Xixiang Zhang, Gianluca Setti
https://arxiv.org/abs/2510.05616

Field Free Spin-Orbit Torque Controlled Synapse and Stochastic Neuron Devices for Spintronic Boltzmann Neural Networks
Spintronics offers a promising approach to energy efficient neuromorphic computing by integrating the functionalities of synapses and neurons within a single platform. A major challenge, however, is achieving field-free spin orbit torque SOT control over both synaptic and neuronal devices using an industry-adopted spintronic materials stack. In this study, we present field-free SOT spintronic synapses utilizing a CoFeB ferromagnetic thin film system, where asymmetrical device design and specifi…

Analyzing the Performance of a 2.72kWp Rooftop Grid tied Photovoltaic System in Tarlac City, Philippines
Aldrin Joar Rodrigo Taduran, Leo P. Piao
https://arxiv.org/abs/2510.03487

Analyzing the Performance of a 2.72kWp Rooftop Grid tied Photovoltaic System in Tarlac City, Philippines
Residential and industrial areas are using rooftop grid-tied Photovoltaic (PV) systems, which are becoming increasingly popular. This is because solar energy reduces electrical consumption and provides free energy, while also lowering carbon emissions to create a more sustainable environment. This paper aims to analyze the 2.72kW p rooftop grid-tied PV system performance between 2020 and 2023 in Tarlac City, Philippines. The PV generated yearly is measured by Array Yield (YA), Reference Yield (…

The algorithmic regulator
Giulio Ruffini
https://arxiv.org/abs/2510.10300 https://arxiv.org/pdf/2510.10300

The algorithmic regulator
The regulator theorem states that, under certain conditions, any optimal controller must embody a model of the system it regulates, grounding the idea that controllers embed, explicitly or implicitly, internal models of the controlled. This principle underpins neuroscience and predictive brain theories like the Free-Energy Principle or Kolmogorov/Algorithmic Agent theory. However, the theorem is only proven in limited settings. Here, we treat the deterministic, closed, coupled world-regulator s…

How to image single isolated atoms by using coherent low-energy electrons
Tatiana Latychevskaia
https://arxiv.org/abs/2509.22586 https://arxiv.org/pdf/2509…

How to image single isolated atoms by using coherent low-energy electrons
Coherent low-energy electrons have been demonstrated as a practical tool for imaging individual macromolecules and two-dimensional (2D) crystals. Low-energy electrons exhibit unique properties: low radiation damage to biological molecules and high sensitivity to the local potentials. In this study, we outline the conditions at which single isolated charge-free atoms can be imaged by low-energy electron holography. A single atom produces an interference pattern consisting of concentric fringes o…

Real-Time Peer-to-Peer Energy Trading for Multi-Microgrids: Improved Double Auction Mechanism and Prediction-Free Online Trading Approach
Kaidi Huang, Lin Cheng, Yue Zhou, Fashun Shi, Yufei Xi, Yingrui Zhuang, Ning Qi
https://arxiv.org/abs/2510.02985

Real-Time Peer-to-Peer Energy Trading for Multi-Microgrids: Improved Double Auction Mechanism and Prediction-Free Online Trading Approach
Peer-to-peer energy trading offers a promising solution for enhancing renewable energy utilization and economic benefits within interconnected microgrids. However, existing real-time P2P markets face two key challenges: high computational complexity in trading mechanisms, and suboptimal participant decision-making under diverse uncertainties. Existing prediction-based decision-making methods rely heavily on accurate forecasts, which are typically unavailable for microgrids, while prediction-fre…

Here are my favourites from the National Portrait Gallery's Portrait Award 2025. It's a fantastic selection this year, and free to see as always.
#art #portraits #painting

Training Deep Normalization-Free Spiking Neural Networks with Lateral Inhibition
Peiyu Liu, Jianhao Ding, Zhaofei Yu
https://arxiv.org/abs/2509.23253 https://

Training Deep Normalization-Free Spiking Neural Networks with Lateral Inhibition
Spiking neural networks (SNNs) have garnered significant attention as a central paradigm in neuromorphic computing, owing to their energy efficiency and biological plausibility. However, training deep SNNs has critically depended on explicit normalization schemes, such as batch normalization, leading to a trade-off between performance and biological realism. To resolve this conflict, we propose a normalization-free learning framework that incorporates lateral inhibition inspired by cortical cir…

Brutal similes
Using #AI is an ethical choice.
I know that there cases when an #LLM could make my job easier. Which doesn't mean I'll use one. Just like I won't be buying cheap junk gadgets that could help me with some random stuff a bunch of times before they'll end up on a trash pile.
Yes, sometimes I am curious what an LLM could come up with. But then, there are people who are curious how many donuts they can eat before throwing up. A waste of good donuts.
What world would you rather live in? One where you put a little more effort in your job? Or one where LLM helps with with your job, but you can't enjoy your free time anymore because the capitalists are using LLMs to turn every single aspect of your life into a nightmare, and eventually your employer just makes you do more and more until you're thrown out? But at least you will get a monthly trial of a statistical "friend" to "talk" about your trouble to.
Yeah, you can claim that training models does the most harm, and that's already happened, so not using them doesn't change much, and all the energy spent on it would be wasted. Or use the traditional "others" fallacy — others will use it anyway, others will fuel the vicious circle, so why renounce convenience. It's like when you learn that your dinner is human meat, and you decide to eat it anyway, because not eating it won't bring that human back to life, and if it's wasted, then their death will be for naught.
#AntiCapitalism

Now, 10,000 EV drivers in Finland are contributing to grid stability. The smart charging service Synergi, which already optimises EV charging according to dynamic power prices, now provides FCR support to the national grid using this aggregated fleet.
https://tech.eu/2025/11/12/finlands-fi

Finland’s first EV virtual power plant goes live
After years of R&D, energy startup Synergi today launched Finland’s first EV virtual power plant. Synergi is the first company in Finland to aggregate thousands of electric vehicles via its consumer app, effectively creating a virtual power plant that supports grid balancing when needed. For consumers, this means the ability to earn rewards with home EV charging. Synergi‘s free mobile app is already trusted by over 10,000 households. Check out our earlier interview with Antti Hämmäinen,�…

Investigating the $w$CDM Model with Latest DESI BAO Observations
Manisg Yadav, Archana Dixit, M. S. Barak, Anirudh Pradhan
https://arxiv.org/abs/2510.09074 https://

Investigating the $w$CDM Model with Latest DESI BAO Observations
In this study, we explore the impact of various combinations of CMB-independent datasets, including the recent DESI BAO measurements, on the equation of state (EoS) of dark energy and other cosmological parameters within the framework of the dynamical dark energy model ($w$CDM). Assuming a constant EoS parameter for dark energy, we derive constraints on the free parameters of the model using observational datasets such as DESI BAO, BBN, Observational Hubble Data (OHD), and Pantheon Plus (SN$^+$…

Understanding the Impact of Hydro-Reservoirs and Inverters on Frequency-Constrained Operation
Valeria Aravena, Samuel Cordova, Maximiliano Kairath, Matias Negrete-Pincetic
https://arxiv.org/abs/2510.06422

Understanding the Impact of Hydro-Reservoirs and Inverters on Frequency-Constrained Operation
The increasing participation of renewable energy sources in power systems has entailed a series of challenges resulting from the replacement of conventional synchronous machines with carbon-free Inverter-Based-Resources (IBRs). In this context, the present work contributes to the existing literature on Frequency-Constrained Unit Commitment (FCUC) models by studying the role of hydro-reservoirs in the ongoing decarbonization of power systems. For this purpose, a novel FCUC model is developed, wh…

Sweden just invested $12M in solar cells that work indoors.
Exeger's Powerfoyle technology could eliminate disposable batteries in everyday electronics by harvesting energy from indoor and outdoor light. The flexible solar cells reduce dependence on critical raw materials while offering high conductivity.
This funding will help scale production and move us closer to a battery-free future for consumer devices.

Sweden backs indoor solar cell technology
A Swedish government agency is investing SEK 130 million ($13.8 million) in the next-generation indoor solar cell technology belonging to Exeger. The company’s Powerfoyle solar cells are an evolution of dye-sensitized solar cells and are said to offer 1,000 times better conductivity.

Scalable accuracy gains from postselection in quantum error correcting codes
Hongkun Chen, Daohong Xu, Grace M. Sommers, David A. Huse, Jeff D. Thompson, Sarang Gopalakrishnan
https://arxiv.org/abs/2510.05222

Scalable accuracy gains from postselection in quantum error correcting codes
Decoding stabilizer codes such as the surface and toric codes involves evaluating free-energy differences in a disordered statistical mechanics model, in which the randomness comes from the observed pattern of error syndromes. We study the statistical distribution of logical failure rates across observed syndromes in the toric code, and show that, within the coding phase, logical failures are predominantly caused by exponentially unlikely syndromes. Therefore, postselecting on not seeing these …

Global energy minimizers for a diffusion-aggregation model on sphere
Razvan C. Fetecau, Hansol Park, Vishnu Vaidya
https://arxiv.org/abs/2509.23227 https://

Global energy minimizers for a diffusion-aggregation model on sphere
We investigate the ground states of a free energy functional on sphere. The energy consists of an entropy and a nonlocal interaction term that are in competition with each other, as they favour spreading and aggregation, respectively. Specifically, the entropy corresponds to slow nonlinear diffusion and the interaction term is modeled by a quadratic interaction potential. We investigate the transitions that occur in the equilibria and the global minimizers of the energy, in terms of the strengt…

Crosslisted article(s) found for cs.CE. https://arxiv.org/list/cs.CE/new
[1/1]:
- Neural Network Surrogates for Free Energy Computation of Complex Chemical Systems
Wasut Pornpatcharapong

Energy-density-driven ultrafast electronic excitations in a cuprate superconductor
Alessandra Milloch (Department of Mathematics and Physics, Universit\`a Cattolica del Sacro Cuore, Brescia, Italy, ILAMP), Francesco Proietto (Department of Mathematics and Physics, Universit\`a Cattolica del Sacro Cuore, Brescia, Italy, Department of Physics and Astronomy, KU Leuven, Leuven, Belgium), Naman Agarwal (Elettra - Sincrotrone Trieste S.C.p.A., Trieste, Italy), Laura Foglia (Elettra - Sincrot…

Energy-density-driven ultrafast electronic excitations in a cuprate superconductor
Controlling nonequilibrium dynamics in quantum materials requires ultrafast probes with spectral selectivity. We report femtosecond reflectivity measurements on the cuprate superconductor Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ using free-electron laser extreme-ultraviolet (23.5--177~eV) and near-infrared (1.5~eV) pump pulses. EUV pulses access deep electronic states, while NIR light excites valence-band transitions. Despite these distinct channels, both schemes produce nearly identical dynamics: above …

🛟 The Abundance Movement’s Blind Spot
#climatechange

The Abundance Movement’s Blind Spot
What if Americans care more about the cost of climate disasters than carbon-free energy?

AdS Length corrected Thermodynamics of a Black Hole in a Cloud of Strings and Perfect Fluid Dark Matter
Nazir A. Ganaie
https://arxiv.org/abs/2509.25255 https://

AdS Length corrected Thermodynamics of a Black Hole in a Cloud of Strings and Perfect Fluid Dark Matter
The research paper investigates the thermodynamic behavior of a black hole in a cloud of strings (CoS) and perfect fluid dark matter (PFDM), incorporating a minor correction to the Anti de Sitter (AdS) length scale. The study reveals that while the entropy remains unaffected by the AdS length correction, other thermodynamic quantities such as enthalpy, free energy, pressure, internal energy, Gibbs free energy, and heat capacity exhibit significant modifications. Positive corrections to the AdS …

Crosslisted article(s) found for math.PR. https://arxiv.org/list/math.PR/new
[1/1]:
- Minima and Critical Points of the Bethe Free Energy Are Invariant Under Deformation Retractions o...
Gr\'egoire Sergeant-Perthuis, L\'eo Boitel

Automated Workflow for Absolute Binding Free Energy Calculations with Implicit Solvent and Double Decoupling
Steven Ayoub, Michael Barton, David A. Case, Tyler Luchko
https://arxiv.org/abs/2509.21808

Automated Workflow for Absolute Binding Free Energy Calculations with Implicit Solvent and Double Decoupling
Accurate absolute binding free energy (ABFE) calculations can reduce the time and cost of identifying drug candidates from a diverse pool of molecules that may have been overlooked experimentally. These calculations typically employ explicit solvents; however these models can be computationally demanding and challenging to implement due to the difficulties in sampling waters and managing changes in net charge. To address these challenges, we introduce an automated parallel Python workflow that …

Average-case quantum complexity from glassiness
Alexander Zlokapa, Bobak T. Kiani, Eric R. Anschuetz
https://arxiv.org/abs/2510.08497 https://arxiv.org/pdf…

Average-case quantum complexity from glassiness
Glassiness -- a phenomenon in physics characterized by a rough free-energy landscape -- implies hardness for stable classical algorithms. For example, it can obstruct constant-time Langevin dynamics and message-passing in random $k$-SAT and max-cut instances. We provide an analogous framework for average-case quantum complexity showing that a natural family of quantum algorithms (e.g., Lindbladian evolution) fails for natural Hamiltonian ensembles (e.g., random 3-local Hamiltonians). Specifical…

Spectral Control of a Cavity-Based X-ray Free-Electron Laser via Active Mode Locking
Nanshun Huang, Hanxiang Yang, Haixiao Deng
https://arxiv.org/abs/2510.00640 https://

Spectral Control of a Cavity-Based X-ray Free-Electron Laser via Active Mode Locking
Precise spectral control in the hard X-ray regime remains a long-standing challenge that limits applications in atomic-scale science and ultrafast spectroscopy. We present an actively mode-locked cavity-based X-ray free-electron laser that achieves deterministic spectral programmability with phase-locked pulse trains and comb-like spectra, by coherently modulating the electron-beam energy. Three-dimensional time-dependent simulations predict \SI{700}{\micro\joule} total energy, \SI{30}{\giga\wa…

Holographic defect CFTs with Dirichlet end-of-the-world branes
Haruki Nakayama, Tatsuma Nishioka
https://arxiv.org/abs/2509.22270 https://arxiv.org/pdf/250…

Holographic defect CFTs with Dirichlet end-of-the-world branes
We construct a holographic model of defect conformal field theories (DCFTs) with defects of codimension greater than one. Our construction generalizes the AdS/BCFT model by anchoring the end-of-the-world brane on defects at the asymptotic AdS boundary and imposing Dirichlet boundary conditions for the metric on the brane. We compute the defect entropy and defect free energy and show that the defect $\mathcal{C}$-function is always non-negative. We further study holographic defect-localized RG f…

Indirect method for nuclear reactions and the role of the self energy
Gregory Potel
https://arxiv.org/abs/2510.09140 https://arxiv.org/pdf/2510.09140

Indirect method for nuclear reactions and the role of the self energy
When a nuclear species (e.g., a nucleon or a deuteron nucleus) propagating freely is made to collide with a target nucleus, its trajectory is modified by exchanging variable amounts of energy, mass, linear and angular momentum with the target, according to its interaction with the nuclear medium. By addressing this perturbation away from the free path, one hopes to learn something about the nature of the medium through which our probe propagates. This is the essence of the experimental use of n…

exaPD: A highly parallelizable workflow for multi-element phase diagram (PD) construction
Feng Zhang, Zhuo Ye, Maxim Moraru, Ying Wai Li, Weiyi Xia, Yongxin Yao, Ryan Richard, Cai-Zhuang Wang
https://arxiv.org/abs/2510.01400

exaPD: A highly parallelizable workflow for multi-element phase diagram (PD) construction
Phase diagrams (PDs) illustrate the relative stability of competing phases under varying conditions, serving as critical tools for synthesizing complex materials. Reliable phase diagrams rely on precise free energy calculations, which are computationally intensive. We introduce exaPD, a user-friendly workflow that enables simultaneous sampling of multiple phases across a fine mesh of temperature and composition for free energy calculations. The package employs standard molecular dynamics (MD) a…

Fluidity and morphological stability of an amorphous thin film with radiation-induced defect kinetics
Tyler P. Evans, Eden Heyen
https://arxiv.org/abs/2510.10745 https://…

Fluidity and morphological stability of an amorphous thin film with radiation-induced defect kinetics
It is common to model ion-irradiated amorphous thin films as if they were highly viscous fluids. In such models, one is frequently concerned with the ion-enhanced fluidity, a measure of the ability of the free interface to relax surface energy. Motivated by usual fluid dynamics problems, the ion-enhanced fluidity is near-universally treated as a constant throughout the amorphous layer. However, for an irradiated thin film, the fluidity is ultimately caused by radiation-induced defect kinetics w…

Canalized hyperbolic magnetoexciton polaritons by Shubnikov-de Haas effect in van der Waals semiconductors
Guangyi Jia, Qizhe Cai, Chunqi Zheng, Xiaoying Zhou, Cheng-Wei Qiu
https://arxiv.org/abs/2510.11163

Canalized hyperbolic magnetoexciton polaritons by Shubnikov-de Haas effect in van der Waals semiconductors
Polariton canalization exhibits highly collimated and diffraction-free propagation characteristics in natural hyperbolic materials, holding great promise for molding the energy flow at nanoscale. Previously, the majority of canalizations are realized in phonon polaritons. Herein, we theoretically explore hyperbolic magnetoexciton polaritons (HMEPs) in van der Waals crystals of WTe2, MoS2, and phosphorene. Based on the Shubnikov-de Haas effect, canalized HMEPs with ultralow group velocity (~10-5…

The Finite-Temperature Behavior of a Triangular Heisenberg Antiferromagnet
Cecilie Glittum, Olav F. Sylju{\aa}sen
https://arxiv.org/abs/2510.02042 https://…

The Finite-Temperature Behavior of a Triangular Heisenberg Antiferromagnet
We investigate the classical antiferromagnetic Heisenberg model on the triangular lattice with up to third-nearest neighbor couplings using nematic bond theory. This approach allows us to compute the free energy and the neutron scattering static structure factor at finite temperatures. We map out the phase diagram with a particular emphasis on finite-temperature phase transitions that break lattice rotational symmetries, spiral spin liquids and the broad specific heat hump that is ubiquitous in…

Mutual entropy and thermal area law in C*-algebraic quantum lattice systems
Hajime Moriya
https://arxiv.org/abs/2510.05823 https://arxiv.org/pdf/2510.05823…

Mutual entropy and thermal area law in C*-algebraic quantum lattice systems
We present a general definition of quantum mutual entropy for infinitely extended quantum spin and fermion lattice systems. Using this, we establish a thermal area law in these infinitely extended quantum systems. The proof is based on the local thermodynamical stability (LTS), a variational principle in terms of the conditional free energy. Our thermal area law in quasi-local C*-systems applies to general interactions with well-defined surface energies. We also examine the quantum mutual entro…

Gravitational entropy of fluids with energy flux
Roberto A. Sussman, Sebasti\'an N\'ajera, Fernando A. Piza\~na, Juan Carlos Hidalgo
https://arxiv.org/abs/2509.25007 htt…

Gravitational entropy of fluids with energy flux
We examine gravitational entropy growth within the formalism of Clifton, Ellis and Tavakol (CET) applied to a class of spherically symmetric exact solutions whose source is a shear-free fluid with energy flux in a comoving frame. By considering these solutions as potential cosmological models, we update previous literature that considered them only as restricted toy models of radiating spheres collapsing in a Vaidya background. In the present paper we examine the integrability of the CET entrop…

A lattice QCD study of low-energy interactions of doubly charmed baryons
Jing-Yu Yi, Ze-Rui Liang, Liuming Liu, De-Liang Yao
https://arxiv.org/abs/2509.24649 https://

A lattice QCD study of low-energy interactions of doubly charmed baryons
We present a lattice QCD calculation of the S-wave interactions between the spin-1/2 doubly charmed baryons ($Ξ_{cc},Ω_{cc}$) and Goldstone bosons ($π,K,\bar{K}$) using the $N_f=2+1$ CLQCD ensembles with lattice spacing $a = 0.07746$ fm and two pion masses $M_π\simeq 210$ and 300 MeV. Four single-channel interactions, $I=1/2$ $Ω_{cc}\bar{K}$, $I=1$ $Ξ_{cc}K$, $I=0$ $Ξ_{cc}K$ and $I=3/2$ $Ξ_{cc}π$, are investigated, since they are free of disconnected diagrams. Lüscher's finite volume …

A no-contact result for a plate-fluid interaction system in dimension three
Mario Bukal, Igor Kukavica, Linfeng Li, Boris Muha
https://arxiv.org/abs/2510.09992 https://

A no-contact result for a plate-fluid interaction system in dimension three
We address the fluid-structure interaction between a viscous incompressible fluid and an elastic plate forming its moving upper boundary in three dimensions. The fluid is described by the incompressible Navier-Stokes equations with a free upper boundary that evolves according to the motion of the structure, coupled via the velocity- and stress-matching conditions. Under the natural energy bounds and additional regularity assumptions on the weak solutions, we prove a non-contact property with a …

Improved Stochastic Optimization of LogSumExp
Egor Gladin, Alexey Kroshnin, Jia-Jie Zhu, Pavel Dvurechensky
https://arxiv.org/abs/2509.24894 https://arxiv.…

Improved Stochastic Optimization of LogSumExp
The LogSumExp function, also known as the free energy, plays a central role in many important optimization problems, including entropy-regularized optimal transport and distributionally robust optimization (DRO). It is also the dual to the Kullback-Leibler (KL) divergence, which is widely used in machine learning. In practice, when the number of exponential terms inside the logarithm is large or infinite, optimization becomes challenging since computing the gradient requires differentiating eve…

Correlative Analysis of Iron-Driven Structural, Optical, and Magnetic Properties in Natural Biotite Crystals
Raphaela de Oliveira, Yara Galv\~ao Gobato, Ronei C. de Oliveira, Jos\'e R. de Toledo, Ver\^onica C. Teixeira, Angelo Malachias, Cesar R. Rabahi, Chunwei Hsu, Adilson J. A. de Oliveira, Herre. S. J. van der Zant, Ingrid D. Barcelos, Alisson R. Cadore

Correlative Analysis of Iron-Driven Structural, Optical, and Magnetic Properties in Natural Biotite Crystals
Biotite crystals are phyllosilicate trioctahedral micas with the general chemical formula K(Mg,Fe)3AlSi3O10(OH)2 that form a solid-solution series with iron-poor phlogopite and iron-rich annite endmembers. With a wide band gap energy and a layered structure with free surface charges, biotite nanosheets can be readily obtained by cleavage methods and used as dielectrics in nanodevice fabrication for the next generation of electronics and energy harvesting. Here, a comprehensive study of biotite …

Active Rosensweig Patterns
Carlo Rigoni, Max Philipp Holl, Alberto Scacchi, Emil Str{\aa}ka, Fereshteh Sohrabi, Mikko P. Haataja, Maria Sammalkorpi, Jaakko V. I. Timonen
https://arxiv.org/abs/2510.09099

Active Rosensweig Patterns
Ferrofluids, colloidal dispersions of magnetic nanoparticles, are renowned for pattern formation like few other materials. The Rosensweig instability of a horizontal ferrofluid-air interface in perpendicular magnetic field is especially well known classically, this instability sets the air-ferrofluid interface into an array of spikes that correspond to a new free energy minimum of the system. However, once the pattern is formed, it does not exhibit any notable thermal or non-equilibrium fluctua…

Phase-induced switching of ferromagnetic insulators in Josephson spin valves
A. A. Mazanik, C. -H. Huang, Miguel A. Cazalilla, F. S. Bergeret
https://arxiv.org/abs/2510.06109 ht…

Phase-induced switching of ferromagnetic insulators in Josephson spin valves
We study the Josephson effect in junctions composed of two ferromagnetic insulator/diffusive superconductor bilayers separated by an insulating barrier. By computing the free energy of the system, we identify two distinct contributions: (i) The work performed by a current source to create a supercurrent through the junction, and (ii) an antiferromagnetic coupling between ferromagnetic insulators, mediated by the superconducting condensate across the insulating barrier. The competition between t…

Folding lattice proteins confined on minimal grids using a quantum-inspired encoding
Anders Irb\"ack, Lucas Knuthson, Sandipan Mohanty
https://arxiv.org/abs/2510.01890 http…

Folding lattice proteins confined on minimal grids using a quantum-inspired encoding
Steric clashes pose a challenge when exploring dense protein systems using conventional explicit-chain methods. A minimal example is a single lattice protein confined on a minimal grid, with no free sites. Finding its minimum energy is a hard optimization problem, withsimilarities to scheduling problems. It can be recast as a quadratic unconstrained binary optimization (QUBO) problem amenable to classical and quantum approaches. We show that this problem in its QUBO form can be swiftly and cons…

Sachdev-Ye-Kitaev Model in a Quantum Glassy Landscape
Surajit Bera, Jorge Kurchan, Marco Schiro
https://arxiv.org/abs/2509.22977 https://arxiv.org/pdf/2509…

Sachdev-Ye-Kitaev Model in a Quantum Glassy Landscape
We study a generalization of `Yukawa models' in which Majorana fermions, interacting via all-to-all random couplings as in the Sachdev-Ye-Kitaev (SYK) model, are parametrically coupled to disordered bosonic degrees of freedom described by a quantum $p-$spin model. The latter has its own non-trivial dynamics leading to quantum paramagnetic (or liquid) and glassy phases. At low temperatures, this setup results in SYK behavior within each metastable state of a rugged bosonic free energy landscape,…

Replaced article(s) found for physics.comp-ph. https://arxiv.org/list/physics.comp-ph/new
[1/1]:
- The dawn of alchemical free-energy methods in biomolecular simulations
Daniele Macuglia, Giovanni Ciccotti, Beno\^it Roux

Mean-field theory of the general-spin Ising model
Lourens Waldorp, Tuan Pham, Han L. J. van der Maas
https://arxiv.org/abs/2509.21638 https://arxiv.org/pdf…

Mean-field theory of the general-spin Ising model
Motivated by modelling in physics and other disciplines, such as sociology and psychology, we derive the mean field of the general-spin Ising model from the variational principle of the Gibbs free energy. The general-spin Ising model has $2k+1$ spin values, generated by $-(k-j)/k$, with $j=0,1,2\ldots,2k$, such that for $k=1$ we obtain $-1,0,1$, for example; the Hamiltonian is identical to that of the standard Ising model. The general-spin Ising model exhibits spontaneous magnetisation, similar…

Spin glasses and the Parisi formula
Jean-Christophe Mourrat
https://arxiv.org/abs/2510.01054 https://arxiv.org/pdf/2510.01054

Spin glasses and the Parisi formula
Spin glasses are models of statistical mechanics in which a large number of simple elements interact with one another in a disordered fashion. One of the fundamental results of the theory is the Parisi formula, which identifies the limit of the free energy of a large class of such models. Yet many interesting models remain out of reach of the classical theory, and direct generalizations of the Parisi formula yield invalid predictions. I will report here on some partial progress towards the reso…

Accurate Modelling of Intrabeam Scattering and its Impact on Photoinjectors for Free-Electron Lasers
Thomas Geoffrey Lucas, Paolo Craievich, Eduard Prat, Sven Reiche, Erion Gjonaj
https://arxiv.org/abs/2510.02058

Accurate Modelling of Intrabeam Scattering and its Impact on Photoinjectors for Free-Electron Lasers
Intrabeam scattering (IBS) is a fundamental effect that can limit the performance of high-brightness electron machines, yet it has so far been neglected in standard modelling of RF photoinjectors. Recent measurements at SwissFEL reveal that the slice energy spread (SES) in the injector is significantly underestimated by conventional tracking codes. In this work, we present a dedicated Monte Carlo simulation model that accurately predicts the IBS-induced SES growth in the photoinjector of an X-r…

Combustion Behaviour of Single Silicon Particles in Different Oxidizing Environments
Herman (Cloud), Heng, Hugo Keck, Christian Chauveau, Samuel Goroshin, Jeffrey Bergthorson, Fabien Halter
https://arxiv.org/abs/2509.24070

Combustion Behaviour of Single Silicon Particles in Different Oxidizing Environments
Silicon, despite its abundance and high energy density, remains underexplored as a carbon-free fuel, with limited data available on its combustion characteristics. In this work, the combustion behaviour of silicon particles is examined using an electrostatic levitator with laser ignition. Five oxidizing environments at atmospheric pressure are investigated: air, pure oxygen, and mixtures containing 40% oxygen (by mole) diluted with nitrogen, helium, or argon. The burning droplet peak temperatur…

Large Deflections of A Flow-Driven Cantilever with Kutta-Joukowski Flow Conditions
Maria Deliyianni, Irena Lasiecka, Justin T. Webster
https://arxiv.org/abs/2509.23306 https://

Large Deflections of A Flow-Driven Cantilever with Kutta-Joukowski Flow Conditions
We consider a canonical flow-structure system modeling airflow over a cantilevered beam. Flow-beam interactions arise in flight systems as well as alternative energy technologies, such as piezoelectric energy harvesters. A potential flow, given through a hyperbolic equation, captures the airflow interacting with a beam clamped on one end and free on the other. The dynamic coupling occurs through an impermeability condition across the beam; in the wake the Kutta-Joukowski flow condition is impos…

Impact of Thermodynamic Corrections on the Stability of Hayward-Anti de Sitter Black Hole Surrounded by a Fluid of Strings
Shyamalee Bora, Dhruba Jyoti Gogoi, Pralay Kumar Karmakar
https://arxiv.org/abs/2510.04208

Impact of Thermodynamic Corrections on the Stability of Hayward-Anti de Sitter Black Hole Surrounded by a Fluid of Strings
We explore the modified thermodynamics of a Hayward-Anti de Sitter (H-AdS) black hole in atypical conditions, incorporating a string fluid, Hayward regularisation, and quantum entropy corrections. Our analysis reveals a first-order phase transition between small and large black hole phases, characterised by a swallowtail behaviour in the Gibbs free energy profiles. It is found that the key parameters - string fluid strength, Hayward regularisation scale, and quantum correction coefficients sign…

Least-Dissipation Interfaces in Fully Miscible Fluids
Gyeong Min Choi, Heon Sang Lee
https://arxiv.org/abs/2509.21335 https://arxiv.org/pdf/2509.21335

Least-Dissipation Interfaces in Fully Miscible Fluids
Sharp interfaces in miscible fluids have long been observed, yet classical theory associates them only with phase coexistence and non-convex free energies. We present a minimal variational frame work where adding a Fermi-Dirac (FD) free energy to a convex bulk contribution preserves miscibility, while the convex term drops out in the gradient balance, leaving the FD part to set a logistic profile by the principle of least dissipation. After formation, the FD interface propagates diffusively and…

Factorial cumulants of proton multiplicity near a critical point using maximum entropy freeze-out prescription
Jamie Karthein, Maneesha Pradeep, Krishna Rajagopal, Mikhail Stephanov, Yi Yin
https://arxiv.org/abs/2510.05567

Factorial cumulants of proton multiplicity near a critical point using maximum entropy freeze-out prescription
We present the first application of the maximum-entropy freeze-out prescription to calculate factorial cumulants of proton multiplicities near the conjectured QCD critical point in thermal equilibrium. We map the Gibbs free energy of the 3D Ising model to a parameterized class of possible EoS near QCD critical point. This equilibrium baseline highlights how factorial cumulants isolate critical fluctuations by subtracting trivial self-correlations, setting the stage for future out-of-equilibrium…

Burgers equation with a twist: A study on rotational-form equations
Adam Larios
https://arxiv.org/abs/2510.02761 https://arxiv.org/pdf/2510.02761

Burgers equation with a twist: A study on rotational-form equations
A new three-dimensional (3D) equation is proposed, which is formed like Burgers' equation by starting with the 3D incompressible Navier-Stokes equations (NSE) and eliminating the pressure and the divergence-free constraint, but instead the Bernoulli pressure is eliminated, leaving only the rotational form of the nonlinearity. This results in a globally well-posed 3D equation which has exactly the same energy balance as the 3D NSE. Moreover, we show in simulations that the system seems to exhibi…

The role of the solid-melt interface in accelerating the self-catalyzed growth kinetics of III-V semiconductors
Zhucong Xi, Abby Liu, Xiaobo Chen, Meng Li, Dmitri N. Zakharov, Judith C. Yang, Rachel S. Goldman, Liang Qi
https://arxiv.org/abs/2509.24206

The role of the solid-melt interface in accelerating the self-catalyzed growth kinetics of III-V semiconductors
Solid-melt interfaces play a pivotal role in governing crystal growth and metal-mediated epitaxy of gallium nitride (GaN) and other semiconductor materials. Using atomistic simulations based on machine-learning interatomic potentials (MLIPs), we uncover that multiple layers of Ga atoms at the GaN-Ga melt interface form structurally ordered and electronically charged configurations that are critical for the growth kinetics of GaN. These ordered layers modulate the free energy landscape (FEL) for…

Short-Pulse High-Power THz Generation Using Optical Klystron FELs: Simulation Results
Najmeh Mirian
https://arxiv.org/abs/2510.05842 https://arxiv.org/pdf/…

Short-Pulse High-Power THz Generation Using Optical Klystron FELs: Simulation Results
We investigate the feasibility of extending the optical klystron (OK) concept into the terahertz (THz) regime, where strong radiation slippage and diffraction fundamentally challenge efficient free- electron laser (FEL) operation. Numerical simulations were carried out for resonant wavelengths of 10, 30, and 100 μm using parameters relevant to the planned DALI facility. The results show that while long wavelengths exhibit rapid energy growth, they suffer from significant temporal broadening du…

A DNA-encoded recipe to direct multi-stage colloidal assembly
Pepijn G. Moerman, Chenghung Chou, Thomas E. Videb{\ae}k, W. Benjamin Rogers, Rebecca Schulman
https://arxiv.org/abs/2509.23440

A DNA-encoded recipe to direct multi-stage colloidal assembly
In equilibrium self-assembly, microscopic building blocks spontaneously self-organize into stable structures as dictated by their interaction potentials, which limits the accessible structural features to those that correspond to global minima in free energy landscapes; they are often ordered and periodic on length scales comparable to the building block size. Coupling the assembly process to an exergonic reaction drives the system out of equilibrium so that an assembly pathway can be engineere…