Decoherence processes of a quantum two-level system coupled to a fermionic environment

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Abstract

We study decoherence processes of an S=12 localized spin coupled to conduction band electrons in a metal or a semiconductor via an Ising-like interaction. We derive master equations for the density matrix of the localized spin by tracing out all degrees of freedom in the conduction electron system based on the linked-cluster-expansion technique. It is found that the decoherence occurs more rapidly for the metallic case than for semiconducting case.

Original languageEnglish
Article number09C110
JournalJournal of Applied Physics
Volume101
Issue number9
DOIs
Publication statusPublished - 2007 May 21
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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