Results 21 to 30 of about 6,598,796 (294)

Entropy, Holography, and the Second Law [PDF]

open access: yesPhysical Review Letters, 2004
The geometric entropy in quantum field theory is not a Lorentz scalar and has no invariant meaning, while the black hole entropy is invariant. Renormalization of entropy and energy for reduced density matrices may lead to the negative free energy even if no boundary conditions are imposed.
openaire   +3 more sources

Second law of information dynamics

open access: yesAIP Advances, 2022
One of the most powerful laws in physics is the second law of thermodynamics, which states that the entropy of any system remains constant or increases over time.
Melvin M. Vopson, S. Lepadatu
doaj   +1 more source

Entropy Scaling Law and the Quantum Marginal Problem

open access: yesPhysical Review X, 2021
Quantum many-body states that frequently appear in physics often obey an entropy scaling law, meaning that an entanglement entropy of a subsystem can be expressed as a sum of terms that scale linearly with its volume and area, plus a correction term that
Isaac H. Kim
doaj   +1 more source

Entropy of radiation: the unseen side of light

open access: yesScientific Reports, 2017
Despite the fact that 2015 was the international year of light, no mention was made of the fact that radiation contains entropy as well as energy, with different spectral distributions.
Alfonso Delgado-Bonal
doaj   +1 more source

Entropy Scaling Laws for Diffusion [PDF]

open access: yesPhysical Review Letters, 2004
Comment to the letter of Samanta et al., Phys. Rev. Lett. 92, 145901 (2004).
openaire   +2 more sources

Entropy production and lost work for irreversible processes [PDF]

open access: yes, 2006
In this paper we analyse in depth the Lost Work in an irreversible process (i.e. IRREV REV Lost ) W =W -W . This quantity is also called ‘degraded energy’ or ‘Energy unavailable to do work’. Usually in textbooks one can find the relation Lost U W o TDS .
Di Liberto, Francesco
core   +1 more source

Relative entropy in diffusive relaxation [PDF]

open access: yes, 2012
We establish convergence in the diffusive limit from entropy weak solutions of the equations of compressible gas dynamics with friction to the porous media equation away from vacuum.
Tzavaras, Athanasios E.   +2 more
core   +1 more source

Teach Second Law of Thermodynamics via Analysis of Flow through Packed Beds and Consolidated Porous Media

open access: yesFluids, 2019
The second law of thermodynamics is indispensable in engineering applications. It allows us to determine if a given process is feasible or not, and if the given process is feasible, how efficient or inefficient is the process.
Rajinder Pal
doaj   +1 more source

Nonequilibrium Entropy Conservation and the Transport Equations of Mass, Momentum, and Energy

open access: yesEnergies, 2021
Nonequilibrium statistical mechanics or molecular theory has put the transport equations of mass, momentum and energy on a firm or rigorous theoretical foundation that has played a critical role in their use and applications. Here, it is shown that those
Michael H. Peters
doaj   +1 more source

On the physical process first law for dynamical black holes

open access: yesJournal of High Energy Physics, 2018
Physical process version of the first law of black hole mechanics relates the change in entropy of a perturbed Killing horizon, between two asymptotic cross sections, to the matter flow into the horizon.
Akash Mishra   +3 more
doaj   +1 more source

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