Tootfinder

Back when #Billionaire #Bezos bought the #WaPo , the DC newspaper claiming to shed light on daily doings in the nation's capital , that paper was selling a quarter million copies a day,... Now after Bezos has neutered the news by pu…

ConciseHint: Boosting Efficient Reasoning via Continuous Concise Hints during Generation
Siao Tang, Xinyin Ma, Gongfan Fang, Xinchao Wang
https://arxiv.org/abs/2506.18810

ConciseHint: Boosting Efficient Reasoning via Continuous Concise Hints during Generation
Recent advancements in large reasoning models (LRMs) like DeepSeek-R1 and OpenAI o1 series have achieved notable performance enhancements on complex reasoning tasks by scaling up the generation length by Chain-of-Thought (CoT). However, an emerging issue is their inclination to produce excessively verbose reasoning processes, leading to the inefficiency problem. Existing literature on improving efficiency mainly adheres to the before-reasoning paradigms such as prompting and reasoning or fine-t…

On surface energies in scaling laws for singular perturbation problems for martensitic phase transitions
Angkana R\"uland, Camillo Tissot, Antonio Tribuzio, Christian Zillinger
https://arxiv.org/abs/2507.06773 https://arxiv.org/pdf/2507.06773 https://arxiv.org/html/2507.06773
arXiv:2507.06773v1 Announce Type: new
Abstract: The objective of this article is to compare different surface energies for multi-well singular perturbation problems associated with martensitic phase transformations involving higher order laminates. We deduce scaling laws in the singular perturbation parameter which are robust in the choice of the surface energy (e.g., diffuse, sharp, an interpolation thereof or discrete). Furthermore, we show that these scaling laws do not require the presence of isotropic surface energies but that generically also highly anisotropic surface energies yield the same scaling results. More precisely, the presence of essentially generic partial directional derivatives in the regularization terms suffices to produce the same scaling behaviour as in the isotropic setting. The only sensitive directional dependences are directly linked to the lamination directions of the well structure -- and even for these only the ``inner-most'' lamination direction is of significance in determining the scaling law. In view of experimental applications, this shows that also for higher-order laminates, the precise structure of the surface energies -- which is often very difficult to determine experimentally -- does not have a crucial impact on the scaling behaviour of the investigated structures but only enters when considering finer properties.
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Anomalous slow-down of the bound state dynamics in a non-locally coupled quantum circuit
Biswajit Paul, Suman Mondal, Tapan Mishra
https://arxiv.org/abs/2506.09818

Anomalous slow-down of the bound state dynamics in a non-locally coupled quantum circuit
Additional hopping channels in a tight-binding lattice is known to introduce faster dynamics of a quantum mechanical particle. However, we show that in the case of a repulsively bound state, the dynamics becomes abnormally slow when next-nearest neighbor (NNN) hopping is allowed for the particles. We show that such slowing down occurs for some magic strength of the NNN hopping at which the bound state band exhibits a quasi-flatband feature. We reveal this anomalous dynamical behavior by analyzi…

This https://arxiv.org/abs/2502.07185 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Expansion-history preferences of DESI DR2 and external data
We explore the origin of the preference of DESI DR2 baryon acoustic oscillation (BAO) measurements and external data from cosmic microwave background (CMB) and type Ia supernovae (SNIa) that dark energy behavior departs from that expected in the standard cosmological model with vacuum energy ($Λ$CDM). In our analysis, we allow a flexible scaling of the expansion rate with redshift that nevertheless allows reasonably tight constraints on the quantities of interest, and adopt and validate a simp…

Anomalous non-thermal fixed point in a quasi-two-dimensional dipolar Bose gas
Niklas Rasch, Lauriane Chomaz, Thomas Gasenzer
https://arxiv.org/abs/2506.01653

Anomalous non-thermal fixed point in a quasi-two-dimensional dipolar Bose gas
The emergence of distinctly sub-diffusive scaling in the vicinity of an anomalous non-thermal fixed point is discussed in a quasi-two-dimensional dipolar Bose gas in the superfluid phase, carrying ensembles of vortices and antivortices with zero net angular momentum. The observed scaling behavior reflects coarsening dynamics driven by the mutual annihilation of vortices and antivortices, with the mean inter-defect distance growing algebraically over time as $\ell_\text{v}(t)\sim t^{\,β}$. A su…

Tilt-Induced Localization in Interacting Bose-Einstein Condensates for Quantum Sensing
Argha Debnath, Mariusz Gajda, Debraj Rakshit
https://arxiv.org/abs/2506.06173

Tilt-Induced Localization in Interacting Bose-Einstein Condensates for Quantum Sensing
We investigate localization transitions in interacting Bose-Einstein condensates (BECs) confined in tilted optical lattices, focusing on both the continuum limit accessed via shallow lattice depths and the tight-binding limit realized in the deep lattice regime. Utilizing the Gross-Pitaevskii equation (GPE) and the many-body Bose-Hubbard model, we analyze the scaling behavior of localization indicators, such as the root mean square width and fidelity susceptibility, as a function of the applied…