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arXiv quant-ph/0411006quant-phhep-th
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Berry相的拓扑性质

Topological properties of Berry's phase

Kazuo Fujikawa

摘要:

通过使用第二个量子化的水平交叉公式,它不假设绝热近似,一个方便的公式,包括非对角项的几何条款。几何相位的分析减少到一个简单的对角化的哈密顿量在本制剂。如果对角化的几何项在无穷小邻域的水平交叉,几何相位成为平凡的任何有限的时间间隔$T$。Berry相位的拓扑解释,例如相变规则的拓扑证明,在实际的玻恩-奥本海默近似中失败,其中涉及两个时间尺度的大而有限的比率。

英文摘要:

By using a second quantized formulation of level crossing, which does not assume adiabatic approximation, a convenient formula for geometric terms including off-diagonal terms is derived. The analysis of geometric phases is reduced to a simple diagonalization of the Hamiltonian in the present formulation. If one diagonalizes the geometric terms in the infinitesimal neighborhood of level crossing, the geometric phases become trivial for any finite time interval $T$. The topological interpretation of Berry's phase such as the topological proof of phase-change rule thus fails in the practical Born-Oppenheimer approximation, where a large but finite ratio of two time scales is involved.

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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