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Solving inverse problems without the use of derivatives or adjoints of the forward model is highly desirable in many applications arising in science and engineering. In this paper, we propose a new version of such a methodology, a framework…

动力系统 · 数学 2019-10-17 Alfredo Garbuno-Inigo , Franca Hoffmann , Wuchen Li , Andrew M. Stuart

In this paper we analyze a PDE system modelling (non-isothermal) phase transitions and damage phenomena in thermoviscoelastic materials. The model is thermodynamically consistent: in particular, no {\em small perturbation assumption} is…

偏微分方程分析 · 数学 2014-11-20 Elisabetta Rocca , Riccarda Rossi

Data-driven methodologies are nowadays ubiquitous. Their rapid development and spread have led to applications even beyond the traditional fields of science. As far as dynamical systems and differential equations are concerned, neural…

数值分析 · 数学 2025-12-05 Dimitri Breda , Xunbi A. Ji , Gábor Orosz , Muhammad Tanveer

In this article we describe the applications of the relative entropy framework. In particular uniqueness of an entropy solution is proven for a scalar conservation law, using the notion of measure-valued entropy solutions. Further we survey…

偏微分方程分析 · 数学 2017-09-06 Tomasz Dębiec , Piotr Gwiazda , Kamila Łyczek , Agnieszka Świerczewska-Gwiazda

We provide a framework for a perturbative evaluation of the reduced density matrix. The method is based on a path integral in the analytically continued spacetime. It suggests an alternative to the holographic and `standard' replica trick…

高能物理 - 理论 · 物理学 2015-06-19 Vladimir Rosenhaus , Michael Smolkin

Observational entropy provides a general notion of quantum entropy that appropriately interpolates between Boltzmann's and Gibbs' entropies, and has recently been argued to provide a useful measure of out-of-equilibrium thermodynamic…

量子物理 · 物理学 2023-05-09 Francesco Buscemi , Joseph Schindler , Dominik Šafránek

We present a detailed description of the essentially entropic lattice Boltzmann model. The entropic lattice Boltzmann model guarantees unconditional numerical stability by iteratively solving the nonlinear entropy evolution equation. In…

统计力学 · 物理学 2022-11-23 Mohammad Atif , Praveen Kumar Kolluru , Santosh Ansumali

The inverse radiative transfer problem finds broad applications in medical imaging, atmospheric science, astronomy, and many other areas. This problem intends to recover the optical properties, denoted as absorption and scattering…

数值分析 · 数学 2017-08-08 Qin Li , Ruiwen Shu , Li Wang

We demonstrate that Shannon's information entropy and the thermodynamic entropy of Boltzmann and Gibbs are quantitatively equivalent for real condensed-matter systems. By interpreting atomic configurations as information sources, we compute…

统计力学 · 物理学 2025-12-03 Dallin Fisher , Qi-Jun Hong

Introduced by Lu and Yau (CMP, 1993), the martingale decomposition method is a powerful recursive strategy that has produced sharp log-Sobolev inequalities for homogeneous particle systems. However, the intractability of certain covariance…

概率论 · 数学 2019-03-05 Jonathan Hermon , Justin Salez

A lower bound on the R\'enyi differential entropy of a sum of independent random vectors is demonstrated in terms of rearrangements. For the special case of Boltzmann-Shannon entropy, this lower bound is better than that given by the…

信息论 · 计算机科学 2015-05-07 Liyao Wang , Mokshay Madiman

The inverse Ising problem and its generalizations to Potts and continuous spin models have recently attracted much attention thanks to their successful applications in the statistical modeling of biological data. In the standard setting,…

定量方法 · 定量生物学 2017-03-06 Pierre Barrat-Charlaix , Matteo Figliuzzi , Martin Weigt

R\'esum\'e: Le principal objet de cette communication est de faire une r\'etro perspective succincte de l'utilisation de l'entropie et du principe du maximum d'entropie dans le domaine du traitement du signal. Apr\`es un bref rappel de…

数据分析、统计与概率 · 物理学 2007-05-23 Ali Mohammad-Djafari

Currently, 'time' does not play any essential role in quantum information theory. In this sense, quantum information theory is underdeveloped similarly to how quantum physics was underdeveloped before Erwin Schrodinger introduced his famous…

介观与纳米尺度物理 · 物理学 2019-09-04 Mohammad H. Ansari , Alwin van Steensel , Yuli V. Nazarov

The irreversible currents and entropy production rate of a dilute colloidal suspension are calculated using the linear irreversible thermodynamics and the linear response theory. The \anomalous" or \hidden" entropy recently discussed in the…

统计力学 · 物理学 2018-08-24 Kunimasa Miyazaki , Yohei Nakayama , Hiromichi Matsuyama

Here we deconstruct, and then in a reasoned way reconstruct, the concept of "entropy of a system," paying particular attention to where the randomness may be coming from. We start with the core concept of entropy as a COUNT associated with…

综合物理 · 物理学 2017-05-10 Tommaso Toffoli

The nonadditive entropy introduced by Tsallis in 1988 has been used in different fields and generalizes the Boltzmann entropy extending the possibilities of application of the statistical methods developed in the context of Mechanics. Here…

统计力学 · 物理学 2022-05-11 Eugenio Megias , Jose A. S. Lima , Airton Deppman

The entropy bottleneck introduced by Ball\'e et al. is a common component used in many learned compression models. It encodes a transformed latent representation using a static distribution whose parameters are learned during training.…

图像与视频处理 · 电气工程与系统科学 2024-06-21 Mateen Ulhaq , Ivan V. Bajić

Entropy and free-energy estimation are key in thermodynamic characterization of simulated systems ranging from spin models through polymers, colloids, protein structure, and drug-design. Current techniques suffer from being model specific,…

统计力学 · 物理学 2019-10-30 Ram Avinery , Micha Kornreich , Roy Beck

We discover an abstract structure behind several nonlinear dispersive equations (including the NLS, NLKG and GKdV equations with generic defocusing power-law nonlinearities) that is reminiscent of hyperbolic conservation laws. The…

偏微分方程分析 · 数学 2025-04-01 Dmitry Vorotnikov