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arXiv 0810.1387math-phmath.MP
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量子粒子系统的平均场极限与半经典展开

Mean-field limit and Semiclassical Expansion of a Quantum Particle System

Federica Pezzotti, Mario Pulvirenti

摘要:

本文考虑由$N$全同粒子构成的量子系统,它们通过平均场哈密顿量相互作用。众所周知,在极限$N\to\infty$中,单粒子态服从Hartree方程。此外,混乱的传播也存在。本文通过考虑$N$ -粒子系统的半经典展开来处理$\hbar$依赖性。我们证明,每个项的扩展同意,在限制$N\to\infty$,与相应的一个与Hartree方程。我们在经典的相空间中工作,使用维格纳形式主义,这似乎是最适合本问题。

英文摘要:

We consider a quantum system constituted by $N$ identical particles interacting by means of a mean-field Hamiltonian. It is well known that, in the limit $N\to\infty$, the one-particle state obeys to the Hartree equation. Moreover, propagation of chaos holds. In this paper, we take care of the $\hbar$ dependence by considering the semiclassical expansion of the $N$-particle system. We prove that each term of the expansion agrees, in the limit $N\to\infty$, with the corresponding one associated with the Hartree equation. We work in the classical phase space by using the Wigner formalism, which seems to be the most appropriate for the present problem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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