Gauging a quantum heat bath with dissipative Landau-Zener transitions
Mesoscale and Nanoscale Physics
2007-05-23 v1 Quantum Physics
Abstract
We calculate the exact Landau-Zener transitions probabilities for a qubit with arbitrary linear coupling to a bath at zero temperature. The final quantum state exhibits a peculiar entanglement between the qubit and the bath. In the special case of a diagonal coupling, the bath does not influence the transition probability, whatever the speed of the Landau-Zener sweep. It is proposed to use Landau-Zener transitions to determine both the reorganization energy and the integrated spectral density of the bath. Possible applications include circuit QED and molecular nanomagnets.
Keywords
Cite
@article{arxiv.cond-mat/0608333,
title = {Gauging a quantum heat bath with dissipative Landau-Zener transitions},
author = {Martijn Wubs and Keiji Saito and Sigmund Kohler and Peter Hänggi and Yosuke Kayanuma},
journal= {arXiv preprint arXiv:cond-mat/0608333},
year = {2007}
}
Comments
4 pages, 1 figure