A constrained optimization problem in quantum statistical physics
A constrained optimization problem in quantum statistical physics
复制标题
量子统计物理中的一个约束优化问题
DOI:
10.1016/j.jfa.2021.109169
复制
发表时间:
2021
影响因子:
1.7
通讯作者:
Pinaud, Olivier
中科院分区:
文献类型:
--
作者:
Duboscq, Romain;Pinaud, Olivier
In this paper, we consider the problem of minimizing quantum free energies under the constraint that the density of particles is fixed at each point of R d, for any d≥ 1. We are more particularly interested in the characterization of the minimizer, which is a self-adjoint nonnegative trace class operator, and will show that it is solution to a nonlinear self-consistent problem. This question of deriving quantum statistical equilibria is at the heart of the quantum hydrodynamical models introduced by Degond and Ringhofer in [4]. An original feature of the problem is the local nature of constraint, ie it depends on position, while more classical models consider the total number of particles in the system to be fixed. This raises difficulties in the derivation of the Euler-Lagrange equations and in the characterization of the minimizer, which are tackled in part by a careful parameterization of the feasible set.
DOI:
10.1090/conm/371/06850
发表时间:
2003
期刊:
ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik
影响因子:
--
作者:
P. Degond;F. Méhats;C. Ringhofer
通讯作者:
C. Ringhofer
DOI:
10.1016/j.matpur.2019.05.001
发表时间:
2017
期刊:
Journal de Mathématiques Pures et Appliquées
影响因子:
--
作者:
Romain Duboscq;Olivier Pinaud Imt;Csu
通讯作者:
Csu