Decoherence by a spin thermal bath: Role of the spin-spin interactions

Abstract

We study the decoherence of two coupled spins that interact with a spin-bath environment. It is shown that the connectivity and the coupling strength between the spins in the environment are of crucial importance for the decoherence of the central system. Changing the connectivity or coupling strenghts changes the decoherence of the central system from Gaussian to exponential decay law.

References in corpus (7)

• Decoherence induced by interacting quantum spin baths
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• Manipulating and protecting entanglement by means of spin environments
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• Dynamics of open quantum spin systems: An assessment of the quantum master equation approach
• Decoherence of a singlet-triplet superposition state under dipolar interactions of an uncorrelated environment
• Decoherence and pointer states in small antiferromagnets: A benchmark test
• Open quantum dynamics theory for a complex subenvironment system with a quantum thermostat: Application to a spin heat bath
• The importance of level statistics for the decoherence of a central spin due to a spin environment
• Stability of Quantum Statistical Ensembles with Respect to Local Measurements
• Temperature crossover of decoherence rates in chaotic and regular bath dynamics
• Relaxation of antiferromagnetic order and growth of Rényi entropy in a generalized Heisenberg star
• Coexistence of the antiferromagnetic and superconducting order and its effect on spin dynamics in electron-doped high-$T_c$ cuprates