Guha, Sruti ; Mukherjee, Debashis (1992) Stochastic averaging in quantum dynamics driven by colored noise: a nonperturbative cluster cumulant approach Chemical Physics Letters, 190 (1-2). pp. 83-90. ISSN 0009-2614
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/000926...
Related URL: http://dx.doi.org/10.1016/0009-2614(92)86107-S
Abstract
We present here a nonperturbative cluster cumulant method for generating the stochastically averaged evolution operator U for quantum systems driven by Ornstein-Uhlenbeck colored noise (real and complex). The method induces a boson mapping of the stochastic variable, and interprets the averaging as an expectation value with respect to the boson vacuum |0B>. The evolution of the mapped operator UB, written in a factorized cluster expansion, is governed by a deterministic Hamiltonian HB defined in an expanded Fock space. The apparatus of our recently developed multireference coupled cluster formalism is invoked to solve the resultant cluster cumulant equations. Numerical applications are presented to illustrate the formalism.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
ID Code: | 21880 |
Deposited On: | 23 Nov 2010 13:04 |
Last Modified: | 05 Mar 2011 12:37 |
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