Constrained minimizers of the von Neumann entropy and their characterization
Constrained minimizers of the von Neumann entropy and their characterization
复制标题
冯诺依曼熵的约束最小化及其表征
DOI:
10.1007/s00526-020-01753-1
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发表时间:
2019
影响因子:
2.1
通讯作者:
O. Pinaud
中科院分区:
文献类型:
--
作者:
Romain Duboscq;O. Pinaud
We consider in this work the problem of minimizing the von Neumann entropy under the constraints that the density of particles, the current, and the kinetic energy of the system is fixed at each point of space. The unique minimizer is a self-adjoint positive trace class operator, and our objective is to characterize its form. We will show that this minimizer is solution to a self-consistent nonlinear eigenvalue problem. One of the main difficulties in the proof is to parametrize the feasible set in order to derive the Euler–Lagrange equation, and we will proceed by constructing an appropriate form of perturbations of the minimizer. The question of deriving quantum statistical equilibria is at the heart of the quantum hydrodynamical models introduced by Degond and Ringhofer (J Statist Phys 112:(3–4), 587-628, 2003). An original feature of the problem is the local nature of constraints, i.e. they depend on position, while more classical models consider the total number of particles, the total current and the total energy in the system to be fixed.
影响因子:
1.7
作者:
Duboscq, Romain;Pinaud, Olivier
通讯作者:
Pinaud, Olivier