Entropy Decay for the Kac Evolution
Entropy Decay for the Kac Evolution
复制标题
Kac 演化的熵衰变
DOI:
10.1007/s00220-018-3263-0
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发表时间:
2018
影响因子:
2.4
通讯作者:
T. Ried
中科院分区:
文献类型:
--
作者:
F. Bonetto;A. Geisinger;M. Loss;T. Ried
We consider solutions to the Kac master equation for initial conditions whereNparticles are in a thermal equilibrium andparticles are out of equilibrium. We show that such solutions have exponential decay in entropy relative to the thermal state. More precisely, the decay is exponential in time with an explicit rate that is essentially independent on the particle number. This is in marked contrast to previous results which show that the entropy production for arbitrary initial conditions is inversely proportional to the particle number. The proof relies on Nelson’s hypercontractive estimate and the geometric form of the Brascamp–Lieb inequalities due to Franck Barthe. Similar results hold for the Kac–Boltzmann equation with uniform scattering cross sections.
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