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

Details Decoherence by a spin thermal bath: Role of the spin-spin interactions and initial state of the bath Decoherence by a spin thermal bath: Role of the spin-spin interactions and initial state of the bath

2008-02-26

arxiv.org/abs/0802.3828v1

Phys. Rev. B 77, 184301 (2008)

Physics

Quantum Physics

submitted to PRB

Scientific paper

10.1103/PhysRevB.77.184301

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. For the anisotropic spin-bath, changing the connectivity or coupling strenghts changes the decoherence of the central system from Gaussian to exponential decay law. The initial state of the environment is shown to affect the decoherence process in a qualitatively significant manner.

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