Gauging a quantum heat bath with dissipative Landau-Zener transitions

Martijn Wubs, Keiji Saito, Sigmund Kohler, Peter Hänggi, Yosuke Kayanuma

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

We calculate the exact Landau-Zener transition probabilities for a qubit with an 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 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.

Original languageEnglish
Article number200404
JournalPhysical review letters
Volume97
Issue number20
DOIs
Publication statusPublished - 2006 Nov 23
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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