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HAIT Journal of Science and Engineering Volume 1, Issue 3, pp. 573-585 © 2004 Holon Academic Institute of Technology | |||||
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Studies of short-time decoherence for evaluation of quantum computer designs
Vladimir Privman* and Denis Tolkunov
Center for Quantum Device Technology, Clarkson University,
| Potsdam, NY 13699--5721, USA *Corresponding author: privman@clarkson.edu Received 14 July 2004, accepted 8 September 2004
| We review our recent results on short time approximations, with emphasis on applications for which the system-environment interactions involve a general non-Hermitian system operator l, and its conjugate, l'. We evaluate the onset of decoherence at low temperatures in open quantum systems. The developed approach is complementary to Markovian approximations and appropriate for evaluation of quantum computing schemes. Example of a spin system coupled to a bosonic heat bath via l ∞ s_ is discussed.
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