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We study the possibility of applying statistical mechanics to generally covariant quantum theories with a vanishing Hamiltonian. We show that (under certain appropiate conditions) this makes sense, in spite of the absence of a notion of…

广义相对论与量子宇宙学 · 物理学 2009-10-31 Merced Montesinos , Carlo Rovelli

In this letter we discuss the Non-gaussian statistics considering two aspects. In the first, we show that the Maxwell's first derivation of the stationary distribution function for a dilute gas can be extended in the context of Kaniadakis…

空间物理 · 物理学 2013-05-08 E. P. Bento , J. R. P. Silva , R. Silva

Quite unexpectedly, kinetic theory is found to specify the correct definition of average value to be employed in nonextensive statistical mechanics. It is shown that the normal average is consistent with the generalized Stosszahlansatz…

统计力学 · 物理学 2015-05-13 Sumiyoshi Abe

Spin glasses are the paradigm of complex systems. These materials present really slow dynamics. However, the nature of the spin glass phase in finite dimensional systems is still controversial. Different theories describing the low…

无序系统与神经网络 · 物理学 2020-06-24 J. J. Ruiz-Lorenzo

We discuss a Statistical Mechanics approach in the manner of Edwards to the ``inherent states'' (defined as the stable configurations in the potential energy landscape) of glassy systems and granular materials. We show that at stationarity…

统计力学 · 物理学 2009-11-07 Annalisa Fierro , Mario Nicodemi , Antonio Coniglio

A simple \(P_\lambda\)-point on a regular cardinal \(\kappa\) is a uniform ultrafilter on \(\kappa\) with a mod-bounded decreasing generating sequence of length \(\lambda\). We prove that if there is a simple $P_\lambda$-point ultrafilter…

逻辑 · 数学 2025-12-10 Tom Benhamou , Gabriel Goldberg

In the present effort we show that $S_{\kappa}=-k_B \int d^3p (n^{1+\kappa}-n^{1-\kappa})/(2\kappa)$ is the unique existing entropy obtained by a continuous deformation of the Shannon-Boltzmann entropy $S_0=-k_B \int d^3p n \ln n$ and…

统计力学 · 物理学 2009-11-07 G. Kaniadakis

Ensemble of initial conditions for nonlinear maps can be described in terms of entropy. This ensemble entropy shows an asymptotic linear growth with rate K. The rate K matches the logarithm of the corresponding asymptotic sensitivity to…

统计力学 · 物理学 2011-01-04 Massmimo Coraddu , Marcello Lissia , Roberto Tonelli

We investigate a notion called uniqueness in power kappa that is akin to categoricity in power kappa, but is based on the cardinality of the generating sets of models instead of on the cardinality of their universes. The notion is quite…

逻辑 · 数学 2016-09-06 Steven Givant , Saharon Shelah

It is shown by simple and straightforward considerations that discreteness of basic physical variables is, at least, essential for generalized statistical mechanics with non-logarithmic entropy to be thermodynamically applicable to…

统计力学 · 物理学 2015-05-19 Sumiyoshi Abe

Dynamical quantum phase transitions (DQPTs) feature singular temporal behavior in transient quantum states during nonequilibrium real-time evolution. In this work we show that DQPTs in random Ising chains exhibit critical behavior with…

统计力学 · 物理学 2021-10-04 Daniele Trapin , Jad C. Halimeh , Markus Heyl

This work is devoted to the formulation and derivation of the $\kappa-\mu$/gamma distribution which corresponds to A physical fading model. This distribution is composite and is based on the well known $\kappa-\mu$ generalized multipath…

信息论 · 计算机科学 2015-05-19 Paschalis C. Sofotasios , Steven Freear

The statistical properties of the local optima (metastable states) of the infinite range Ising spin glass with p-spin interactions in the presence of an external magnetic field h are investigated analytically. The average number of optima…

凝聚态物理 · 物理学 2009-10-30 Viviane M de Oliveira , J F Fontanari

In this paper, we are interested in parallels to the classical notions of special subsets in $\R$ defined in the generalized Cantor and Baire spaces ($2^\kappa$ and $\kappa^\kappa$). We consider generalizations of the well-known classes of…

逻辑 · 数学 2020-03-03 Michał Korch , Tomasz Weiss

Metastability is a physical phenomenon ubiquitous in first order phase transitions. A fruitful mathematical way to approach this phenomenon is the study of rare transitions Markov chains. For Metropolis chains associated with Statistical…

概率论 · 数学 2015-09-30 Emilio Cirillo , Francesca Nardi , Julien Sohier

We obtain exact analytic expressions for a class of functions expressed as integrals over the Haar measure of the unitary group in d dimensions. Based on these general mathematical results, we investigate generic dynamical properties of…

量子物理 · 物理学 2013-04-30 Manuel Gessner , Heinz-Peter Breuer

[This is the unpublished supplemental information from 1989 to the paper: J.M. Deutsch, "Quantum statistical mechanics in a closed system." Phys. Rev. A, 43(4), 2046 (1991).] A closed quantum mechanical system does not necessarily give time…

量子物理 · 物理学 2025-02-25 J. M. Deutsch

We deform Heisenberg algebra and corresponding coalgebra by twist. We present undeformed and deformed tensor identities. Coalgebras for the generalized Poincar\'{e} algebras have been constructed. The exact universal $R$-matrix for the…

数学物理 · 物理学 2015-06-04 Stjepan Meljanac , Andjelo Samsarov , Rina Strajn

The paper continues a series of papers devoted to treatment of the crystalline state on the basis of the approach in equilibrium statistical mechanics proposed earlier by the author. This paper is concerned with elaboration of a…

统计力学 · 物理学 2013-02-08 V. A. Golovko

Open driven quantum systems have defined a powerful paradigm of nonequilibrium phases and phase transitions; however, quantum phase transitions are generically not expected in this setting due to the decohering effect of dissipation. In…

量子气体 · 物理学 2026-02-18 Mostafa Ali , Naushad A. Kamar , Alireza Seif , Mohammad Maghrebi