Results 51 to 60 of about 458,070 (185)
Topological aspects of generalized gravitational entropy [PDF]
Journal of High Energy Physics, 2015 The holographic prescription for computing entanglement entropy requires that the bulk extremal surface, whose area encodes the amount of entanglement, satisfies a homology constraint. Usually this is stated as the requirement of a (spacelike) interpolating surface that connects the region of interest and the extremal surface.
Haehl, Felix M. +4 more
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On the thermal gradient in the Earth's deep interior [PDF]
Solid Earth, 2016 Temperature variations in large portions of the mantle are mainly controlled by the reversible and irreversible transformation of mechanical energy related to pressure and viscous forces into internal energy along with diffusion of heat and chemical ...
M. Tirone
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Multiscale Entropy Analysis of Gravitational Waves
Advances in High Energy Physics, 2021 The first gravitational-wave (GW) signal was detected in the year 2015 indicating tiny distortions of spacetime caused by accelerated masses. We focused on the GW signals consisting of a peak GW strain of 1.0×10−21 that shows merging pairs of large ...
Mohsen Javaherian, Saeid Mollaei
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Large field inflation and gravitational entropy [PDF]
Physical Review D, 2016 Large field inflation can be sensitive to perturbative and nonperturbative quantum corrections that spoil slow roll. A large number $N$ of light species in the theory, which occur in many string constructions, can amplify these problems. One might even worry that in a de Sitter background, light species will lead to a violation of the covariant entropy
Kaloper, Nemanja +3 more
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Gravitational anomalies and entropy [PDF]
General Relativity and Gravitation, 2012 A derivation of entropy from the expressions for two dimensional gravitation anomalies is given. Starting from the near horizon anomalous energy-momentum tensors corresponding to particular anomalies, the Virasoro algebra with central extension is obtained. The central charge is identified by comparing with the standard form of the algebra.
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Entropy Generation Due to the Heat Transfer for Evolving Spherical Objects
Entropy, 2018 Heat transfer accompanying entropy generation for the evolving mini and microbubbles in solution is discussed based on the explicit solutions for the hydrodynamic equations related to the bubble motion. Even though the pressure difference between the gas
Ho-Young Kwak
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Is There a Unique Physical Entropy? Micro versus Macro [PDF]
, 2012 Entropy in thermodynamics is an extensive quantity, whereas standard methods in statistical mechanics give rise to a non-extensive expression for the entropy. This discrepancy is often seen as a sign that basic formulas of statistical mechanics should be
Dieks, D.G.B.J. +4 more
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Quantum Entropy and the Mechanism of Gravity
Reports in Advances of Physical SciencesQuantum entropy measures the number of possible microstates of position and momentum due to quantum uncertainty. Black hole entropy is an example of quantum entropy.
Christopher N. Watson
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Cosmological Perturbation Theory and Gravitational Entropy [PDF]
, 2003 The main objective of this thesis is to consider the concept of gravitational entropy from a perturbative point of view. A flat, matter dominated universe model is subjected to a linear perturbation, and the entropic properties of the resulting universe ...
Amarzguioui, Morad
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An entropy-based criterion for geodesic incompleteness
Physics Letters BWe develop an entropy-based formulation of gravitational focusing in Lorentzian geometry by associating a scalar entropy functional to timelike geodesic congruences.
Rohit Dhormare
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