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arXiv 1107.0341quant-phcond-mat.stat-mech
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微扰定义的路径积分的有效经典哈密顿量

Effective Classical Hamiltonian from Perturbatively Defined Path Integral

Michael Bachmann

摘要:

通过引入微扰定义,可以在不进行切片的情况下计算相空间路径积分。这分别导致量子力学路径振幅的短时膨胀或非归一化密度矩阵的高温膨胀。我们使用所提出的形式来计算谐振子的有效经典哈密顿量。

英文摘要:

Introducing a perturbative definition, phase space path integrals can be calculated without slicing. This leads to a short-time expansion of the quantum-mechanical path amplitude, or a high-temperature expansion of the unnormalized density matrix, respectively. We use the proposed formalism to calculate the effective classical Hamiltonian for the harmonic oscillator.

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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