Results 31 to 40 of about 121,703 (314)

Application of Fractional Calculus to Establish Equations of State for Solid Metals

open access: yesFractal and Fractional, 2023
Fractional differ-integral operators are used to obtain the equation of state for a substance that can be seen as fractal. Two equations of state have been obtained, the first of which depends on two parameters that characterize the fractal dimension of ...
Vladimir Kulish   +2 more
doaj   +1 more source

Effect of the Minimal Length on Bose-Einstein Condensation in the Relativistic Ideal Bose Gas

open access: yes, 2014
Based on the generalized uncertainty principle (GUP), the critical temperature and the Helmholtz free energy of Bose-Einstein condensation (BEC) in the relativistic ideal Bose gas are investigated. At the non-relativistic limit and the ultra-relativistic
Tian, Chi, Zhang, Xiuming
core   +1 more source

Maximal forces and thermodynamic quantities of specific black holes in modified theories of gravity

open access: yesNuclear Physics B, 2023
In this work, we explore the maximum force conjecture and thermal fluctuations for different black holes such as the brane-world black hole, de Rham-Gabadadze-Tolley black hole, Black-Bounce Reisner-Nordström black hole, and renormalization group ...
Abdul Jawad, Usman Zafar
doaj   +1 more source

Study of stability of relativistic ideal Bose-Einstein condensates

open access: yes, 2012
A relativistic complex scalar boson field at finite temperature $T$ is examined below its critical Bose-Einstein condensation temperature. It is shown that at the same $T$ the state with antibosons has higher entropy, lower Helmholtz free energy and ...
Alcubierre   +49 more
core   +1 more source

Classifying topology of consistent thermodynamics of the four-dimensional neutral Lorentzian NUT-charged spacetimes

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
In this paper, via employing the uniformly modified form of the generalized off-shell Helmholtz free energy, we investigate the topological numbers for the four-dimensional neutral Lorentzian Taub–NUT, Taub–NUT–AdS and Kerr–NUT spacetimes, and find that ...
Di Wu
doaj   +1 more source

Variance Reduction Result for a Projected Adaptive Biasing Force Method

open access: yes, 2017
This paper is committed to investigate an extension of the classical adaptive biasing force method, which is used to compute the free energy related to the Boltzmann-Gibbs measure and a reaction coordinate function.
E. Darve   +5 more
core   +1 more source

Helmholtz and Gibbs free energies of liquid foams

open access: yesPhilosophical Magazine Letters, 2004
The relative stability of different configurations (i.e. geometries/topologies) of a foam cluster is shown to depend on the choice of constraints, viz. fixed bubble and Plateau border sizes, or fixed bubble and Plateau border pressures. The appropriate thermodynamic potential is the Gibbs free energy, which comprises the (Helmholtz) surface energy plus
M. A. Fortes, P. I. C. Teixeira §
openaire   +1 more source

Extended thermodynamic analysis of a charged Horndeski black hole

open access: yesPhysics Letters B
We perform the thermodynamic analysis of a charged Horndeski black hole (CHB) with mass m and charge q obtained from the Einstein-Horndeski-Maxwell theory. There are two solution branches: one is for the CHB and the other is for the naked singularity (NS)
Yun Soo Myung
doaj   +1 more source

Thermodynamic insight into stimuli-responsive behaviour of soft porous crystals

open access: yesNature Communications, 2018
Knowledge of the thermodynamic potential is crucial to characterize the macroscopic state of soft porous crystals. Here, the authors present a generalized thermodynamic approach to construct the Helmholtz free energy and identify the conditions under ...
L. Vanduyfhuys   +6 more
doaj   +1 more source

The high temperature expansion of the classical $XYZ$ chain

open access: yes, 2006
We present the $\beta$-expansion of the Helmholtz free energy of the classical $XYZ$ model, with a single-ion anisotropy term and in the presence of an external magnetic field, up to order $\beta^{12}$. We compare our results to the numerical solution of
Baker   +21 more
core   +1 more source

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