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Phys. Rev. A 73, 062321 (2006) [4 pages]Universal destabilization and slowing of spin-transfer functions by a bath of spins
Received 24 January 2006; published 14 June 2006
We investigate the effect of a spin bath on the spin-transfer functions of a permanently coupled spin system. When each spin is coupled to a separate environment, the effect on the transfer functions in the first excitation sector is amazingly simple: the group velocity is slowed down by a factor of 2, and the fidelity is destabilized by a modulation of |cos Gt|, where G is the mean square coupling to the environment. ©2006 The American Physical Society
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