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arXiv math-ph/0303070math-phmath.MP
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含时Hartree-Fock近似的精度

Accuracy of the time-dependent Hartree-Fock approximation

Claude Bardos, Francois Golse, Alex D. Gottlieb, Norbert J. Mauser

摘要:

本文研究了相互作用费米子系统中单粒子动力学的含时Hartree-Fock(TDHF)近似。我们发现TDHF近似是准确的,当有足够多的粒子和初始的多粒子状态是斯莱特行列式,或任何吉布斯平衡态的非相互作用费米子。假设一个有界的两粒子相互作用,我们得到的TDHF近似,有效的短时间内的误差的限制。我们进一步表明,TDHF近似的误差在任何时候都消失在平均场极限。

英文摘要:

This article examines the time-dependent Hartree-Fock (TDHF) approximation of single-particle dynamics in systems of interacting fermions. We find the TDHF approximation to be accurate when there are sufficiently many particles and the initial many-particle state is a Slater determinant, or any Gibbs equilibrium state for noninteracting fermions. Assuming a bounded two-particle interaction, we obtain a bound on the error of the TDHF approximation, valid for short times. We further show that the error of the the TDHF approximation vanishes at all times in the mean field limit.

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