量子振子中的耗散与退相干
量子物理
2015-06-26 v2
摘要
通过德拜-瓦勒形式的恒等式，计算了通过将量子振子耦合到欧姆环境而阻尼的约化密度矩阵的随时间演化。由此恢复了Hakim和作者多年前在自由粒子极限下获得的结果[1]。考察了处于制备初态的自由粒子的演化，并用图示阐明先前发表的交流[2,3]，表明无耗散则无退相干。[1] V. Hakim and V. Ambegaokar, Phys. Rev. A 32, 423 (1985). [2] G.W. Ford and R.F. O'Connell, Phys. Rev. A 70, 026102 (2004). [3] D. Gobert, J. von Delft, and V. Ambegaokar, Phys. Rev. A 70, 0261001 (2004).
引用
@article{arxiv.quant-ph/0506087,
title = {Dissipation and decoherence in a quantum oscillator},
author = {Vinay Ambegaokar},
journal= {arXiv preprint arXiv:quant-ph/0506087},
year = {2015}
}
备注
To appear in the Journal of Statistical Physics (Langer-Hohenberg issue.) Accepted version with minor corrections and revisions