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

Abstract

We study decoherence processes of an S = 1/2 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.

to appear in J. Appl. Phys

References in corpus (5)

• Spintronics: Fundamentals and applications
• Nonlocal magnetization dynamics in ferromagnetic heterostructures
• Single Electron Spin Decoherence by Nuclear Spin Bath: Linked Cluster Expansion Approach
• Mean-field magnetization relaxation in conducting ferromagnets
• The Ising-Kondo lattice with transverse field: an f-moment Hamiltonian for URu2Si2?

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• Fröhlich-coupled qubits interacting with fermionic baths