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相关论文: Bounds on the Tsallis Parameter from a deformed Ne…

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The exact analytical formulas for the transverse momentum distributions of the Bose-Einstein, Fermi-Dirac and Maxwell-Boltzmann statistics of particles with nonzero mass in the framework of the Tsallis normalized and Tsallis unnormalized…

核理论 · 物理学 2021-12-09 A. S. Parvan , T. Bhattacharyya

We develop a new nonparametric method to reconstruct the Equation of State (EoS) of Neutron Star with multimessenger data. As an universal function approximator, the Feed-Forward Neural Network (FFNN) with one hidden layer and a sigmoidal…

高能物理 - 唯象学 · 物理学 2023-06-16 Ming-Zhe Han , Jin-Liang Jiang , Shao-Peng Tang , Yi-Zhong Fan

We study three-flavor neutrino oscillations in the early universe in the presence of neutrino chemical potentials. We take into account all effects from the background medium, i.e. collisional damping, the refractive effects from charged…

高能物理 - 唯象学 · 物理学 2009-11-07 A. D. Dolgov , S. H. Hansen , S. Pastor , S. T. Petcov , G. G. Raffelt , D. V. Semikoz

We derive Tsallis entropy, Sq, from universal thermostat independence and obtain the functional form of the corresponding generalized entropy-probability relation. Our result for finite thermostats interprets thermodynamically the subsystem…

高能物理 - 唯象学 · 物理学 2014-05-19 T. S. Biró , G. G. Barnaföldi , P. Ván

We calculate the evolution of the early universe through the epochs of weak decoupling, weak freeze-out and big bang nucleosynthesis (BBN) by simultaneously coupling a full strong, electromagnetic, and weak nuclear reaction network with a…

宇宙学与河外天体物理 · 物理学 2016-04-27 E. Grohs , G. M. Fuller , C. T. Kishimoto , M. W. Paris , A. Vlasenko

Within the Tsallis thermodynamics' framework, and using scaling properties of the entropy, we derive a generalization of the Gibbs-Duhem equation. The analysis suggests a transformation of variables that allows standard thermodynamics to be…

统计力学 · 物理学 2009-11-07 Eduard Vives , Antoni Planes

Based on the basic definition of Fermi energy of degenerate and relativistic electrons, we obtain a special solution to electron Fermi energy, $E_{\rm F}(e)$, and express $E_{\rm F}(e)$ as a function of electron fraction, $Y_{e}$, and…

高能天体物理现象 · 物理学 2016-03-09 Xing Hu Li , Zhi Fu Gao , Xiang Dong Li , Yan Xu , Pei Wang , Na Wang , Jianping Yuan

The accelerated expansion of the Universe is one of the greatest challenges of modern physics. One candidate to explain this phenomenon is a new field called dark energy. In this work we have used the Tsallis nonextensive statistical…

广义相对论与量子宇宙学 · 物理学 2014-03-25 Rafael da C. Nunes , Edésio M. Barboza , Everton M. C. Abreu , Jorge Ananias Neto

By using most of the present CMB and LSS measurements and the BBN constraints on the primordial helium abundance, Y_p, we set bounds on the radiation content of the Universe and neutrino properties. We consider lepton asymmetric…

天体物理学 · 物理学 2010-02-26 Lucia Aurelia Popa , Ana Vasile

We study the applications of non-extensive Tsallis statistics to high energy and hadron physics. These applications include studies of $pp$ collisions, equation of state of QCD, as well as Bose-Einstein condensation. We also analyze the…

In this paper, we propose a new discriminative model named \emph{nonextensive information theoretical machine (NITM)} based on nonextensive generalization of Shannon information theory. In NITM, weight parameters are treated as random…

机器学习 · 计算机科学 2016-04-22 Chaobing Song , Shu-Tao Xia

We study quintessential inflation using a generalized exponential potential $V(\phi)\propto exp(-\lambda \phi^n/Mpl^n), n>1$, the model admits slow-roll inflation at early times and leads to close-to-scaling behaviour in the post…

广义相对论与量子宇宙学 · 物理学 2017-06-21 Chao-Qiang Geng , Chung-Chi Lee , M. Sami , Emmanuel N. Saridakis , Alexei A. Starobinsky

We apply Bayesian approach to construct a large number of minimally constrained equations of state (EOSs) and study their correlations with a few selected properties of a neutron star (NS). Our set of minimal constraints includes a few…

核理论 · 物理学 2022-08-26 N. K. Patra , Sk Md Adil Imam , B. K. Agrawal , Arunava Mukherjee , Tuhin Malik

We revisit the issues on the thermodynamic property of stellar self-gravitating system arising from Tsallis' non-extensive entropy. Previous papers (Taruya & Sakagami, Physica A 307 (2002) 185 (cond-mat/0107494); ibid. (2002) in press…

统计力学 · 物理学 2009-11-07 Atsushi Taruya , Masa-aki Sakagami

Data from Type Ia supernovae, along with X-ray cluster estimates of the universal baryon fraction and Big Bang Nucleosynthesis (BBN) determinations of the baryon-to-photon ratio, are used to provide estimates of several global cosmological…

天体物理学 · 物理学 2007-05-23 G. Steigman , T. P. Walker , A. Zentner

Observations of neutron stars (NSs) by the LIGO-Virgo and NICER collaborations have provided reasonably precise measurements of their various macroscopic properties. In this paper, we employ a Bayesian framework to combine them and place…

高能天体物理现象 · 物理学 2021-05-26 Bhaskar Biswas , Prasanta Char , Rana Nandi , Sukanta Bose

We investigate the limiting cases of Tsallis statistics. The viewpoint adopted is not the standard information-theoretic one, where one derives the distribution from a given measure of information. Instead the mechanical approach recently…

统计力学 · 物理学 2007-06-22 Michele Campisi

At the ultra-high densities existing in the core of neutron stars, it is expected that a phase transition from baryonic to deconfined quark matter may occur. Such a phase transition would affect the underlying equation of state (EoS) as…

高能天体物理现象 · 物理学 2023-12-15 Swarnim Shirke , Suprovo Ghosh , Debarati Chatterjee

Using a Bayesian approach, we combine measurements of neutron star macroscopic observables obtained by astrophysical and gravitational observations, to derive joint constraints on the equation of state (EoS) of matter at supranuclear…

高能天体物理现象 · 物理学 2019-10-09 Margherita Fasano , Tiziano Abdelsalhin , Andrea Maselli , Valeria Ferrari

Based on Tsallis entropy and the corresponding deformed exponential function, generalized distribution functions for bosons and fermions have been used since a while. However, aiming at a non-extensive quantum statistics further…

统计力学 · 物理学 2015-03-11 T. S. Biro , K. M. Shen , B. W. Zhang