Tootfinder

This https://arxiv.org/abs/2504.12674 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Can spacetime fluctuations generate entanglement between co-moving accelerated detectors?
Recent studies [Class. Quant. Grav. 42, 03LT01 (2025); Phys. Rev. D 111, 045023 (2025)] indicate that in a nested sequence of Rindler wedges, vacuum of former Rindler frame appears to be thermally populated for an observer in shifted Rindler frame. Interestingly, this thermality is independent of shift parameter as long as it is non-zero and therefore arises even if the shift parameter is as small as Planck length. Building on this insight, we propose a set-up involving two atoms accelerating w…

This https://arxiv.org/abs/2504.21856 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Holography and Causality in the Karch-Randall Braneworld
It has been argued that the existence of a geodesic shortcut in the Karch-Randall (KR) braneworld rules out the possibility for a low-energy intermediate theory, even when gravity is turned off. We study this problem in an explicit example with two symmetrically placed KR branes. We find that there can be a consistent quantization of bulk matter fields with a holographic intermediate description. In our model, there is no causality violation. We use this example to study potential implications …

TrendFolios: A Portfolio Construction Framework for Utilizing Momentum and Trend-Following In a Multi-Asset Portfolio
Joseph Lu, Randall R Rojas, Fiona C. Yeung, Patrick D. Convery
https://arxiv.org/abs/2506.09330

TrendFolios: A Portfolio Construction Framework for Utilizing Momentum and Trend-Following In a Multi-Asset Portfolio
We design a portfolio construction framework and implement an active investment strategy utilizing momentum and trend-following signals across multiple asset classes and asset class risk factors. We quantify the performance of this strategy to demonstrate its ability to create excess returns above industry standard benchmarks, as well as manage volatility and drawdown risks over a 22+ year period.

XRISM insights for interstellar Sulfur
Lia Corrales, Elisa Costantini, Sascha Zeeger, Liyi Gu, Hiromitsu Takahashi, David Moutard, Megumi Shidatsu, Jon M. Miller, Misaki Mizumoto, Randall K. Smith, Ralf Ballhausen, Priyanka Chakraborty, Marua Diaz Trigo, Renee Ludlam, Takao Nakagawa, Ioanna Psaradaki, Shinya Yamada, Caroline A. Kilbourne
https://

XRISM insights for interstellar Sulfur
The X-ray Imaging Spectroscopy Mission (XRISM) provides the best spectral resolution with which to study Sulfur (S) K-shell photoabsorption features from the interstellar medium (ISM). For the first time, we demonstrate the high-signal detection of interstellar atomic SII K-beta absorption in the spectrum of X-ray binaries (XRBs) 4U 1630-472 and GX 340+0. The persistence of this feature across multiple instruments, targets, and flux states implies that it is interstellar in nature. We measure t…

Quantum light and radiation in Rindler spacetime: from uncertainty relations to the cosmological implications
Fujin Wang, Syed Masood, L. G. Wang
https://arxiv.org/abs/2506.02417 …

Quantum light and radiation in Rindler spacetime: from uncertainty relations to the cosmological implications
Based on an analogy between diffraction integral formalism of classical field propagation and Feynman path integral approach to quantum field theory, we develop a quantum model for light and radiation in Rindler spacetime. The framework helps to reveal acceleration-induced contributions to the traditional Heisenberg position-momentum uncertainty relation. A modified Planck energy density distribution of radiation is established and reveals equivalence between temperature and Rindler acceleratio…

The influence of cell phenotype on collective cell invasion into the extracellular matrix
Yuan Yin, Sarah L. Waters, Ruth E. Baker
https://arxiv.org/abs/2506.06810

The influence of cell phenotype on collective cell invasion into the extracellular matrix
Understanding the interactions between cells and the extracellular matrix (ECM) during collective cell invasion is crucial for advancements in tissue engineering, cancer therapies, and regenerative medicine. This study focuses on the roles of contact guidance and ECM remodelling in directing cell behaviour, with a particular emphasis on exploring how differences in cell phenotype impact collective cell invasion. We present a computationally tractable two-dimensional hybrid model of collective c…

Do you want to see me perform in an Improv show?
You can you know. You can do it in Shoreditch in London in the UK on Sunday.
Dunno what the show will be about, obviously. Some short games, couple of longer stories. But we need YOU there to tell us what it's about.
What else in London is free? Nothing, that's what.
#improv #liveShow #london

TritonZ: A Remotely Operated Underwater Rover with Manipulator Arm for Exploration and Rescue Operations
Kawser Ahmed, Mir Shahriar Fardin, Md Arif Faysal Nayem, Fahim Hafiz, Swakkhar Shatabda
https://arxiv.org/abs/2506.18343

TritonZ: A Remotely Operated Underwater Rover with Manipulator Arm for Exploration and Rescue Operations
The increasing demand for underwater exploration and rescue operations enforces the development of advanced wireless or semi-wireless underwater vessels equipped with manipulator arms. This paper presents the implementation of a semi-wireless underwater vehicle, "TritonZ" equipped with a manipulator arm, tailored for effective underwater exploration and rescue operations. The vehicle's compact design enables deployment in different submarine surroundings, addressing the need for wireless system…

Defining and classifying models of groups: The social ontology of higher-order networks
Jonathan St-Onge, Randall Harp, Giulio Burgio, Timothy M. Waring, Juniper Lovato, Laurent H\'ebert-Dufresne
https://arxiv.org/abs/2507.02758

Defining and classifying models of groups: The social ontology of higher-order networks
In complex systems research, the study of higher-order interactions has exploded in recent years. Researchers have formalized various types of group interactions, such as public goods games, biological contagion, and information broadcasting, showing how higher-order networks can capture group effects more directly than pairwise models. However, equating hyperedges-edges involving more than two agents-with groups can be misleading, as it obscures the polysemous nature of ``group interactions''.…

Non-reciprocal interactions reshape cells in a model for symbiosis
Maitane Mu\~noz-Basagoiti, Michael Wassermair, Miguel Amaral, Buzz Baum, An{\dj}ela \v{S}ari\'c
https://arxiv.org/abs/2506.13299

Non-reciprocal interactions reshape cells in a model for symbiosis
The shape of a cell influences and it is influenced by interactions with its neighbouring partners. Here, we introduce a coarse-grained model of non-reciprocal interactions between single-cell organisms to study emergent morphologies during symbiotic association. We show that the cell membrane can be remodelled into branched protrusions, invaginations, transient blebs and other dynamical phases that depend on the number of interacting partners, the asymmetry, and the magnitude of partnership ac…