Grand Canonical Evolution for the Kac Model
Grand Canonical Evolution for the Kac Model
复制标题
Kac 模型的大规范演化
DOI:
10.1007/s10955-022-02932-4
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发表时间:
2022
影响因子:
1.6
通讯作者:
Bonetto, Federico
中科院分区:
文献类型:
--
作者:
Beck, Justin;Bonetto, Federico
We study a model of random colliding particles interacting with an infinite reservoir at fixed temperature and chemical potential. Interaction between the particles is modeled via a Kac master equation (in: Kay, Proceedings of the Third Berkeley Symposium on Mathematical Statistics and Probability, 1954–1955, University of California Press, Berkeley and Los Angeles, 1956). Moreover, particles can leave the system toward the reservoir or enter the system from the reservoir. The system admits a unique steady state given by the Grand Canonical Ensemble at temperatureand chemical potential. We show that any initial state converges exponentially fast to equilibrium by computing the spectral gap of the generator in a suitablespace and by showing exponential decrease of the relative entropy with respect to the steady state. We also show propagation of chaos and thus the validity of a Boltzmann-Kac type equation for the particle density in the infinite system limit.
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