Dephasing and Renormalization in Quantum Two-Level Systems
介观与纳米尺度物理
2007-05-23 v2
摘要
Motivated by fundamental questions about the loss of phase coherence at low temperature we consider relaxation, dephasing and renormalization effects in quantum two-level systems which are coupled to a dissipative environment. We observe that experimental conditions, e.g., details of the initial state preparation, determine to which extent the environment leads to dephasing or to renormalization effects. We analyze an exactly solvable limit where the relation between both can be demonstrated explicitly. We also study the effects of dephasing and renormalization on response functions.
引用
@article{arxiv.cond-mat/0210023,
title = {Dephasing and Renormalization in Quantum Two-Level Systems},
author = {Alexander Shnirman and Gerd Schön},
journal= {arXiv preprint arXiv:cond-mat/0210023},
year = {2007}
}
备注
submitted to Proceedings of NATO ARW "Quantum Noise in Mesoscopic Physics" Delft, 2 to 4 june 2002, some typos corrected