Embedding dissipation and decoherence in unitary evolution schemes

Details Embedding dissipation and decoherence in unitary evolution schemes Embedding dissipation and decoherence in unitary evolution schemes

2002-05-17

arxiv.org/abs/quant-ph/0205113v3

Phys. Rev. Lett. 89, 220405 (2002)

Physics

Quantum Physics

4 pages, 2 figs

Scientific paper

10.1103/PhysRevLett.89.220405

Dissipation and decoherence, and the evolution from pure to mixed states in quantum physics are handled through master equations for the density matrix. By embedding elements of this matrix in a higher-dimensional Liouville-Bloch equation, the methods of unitary integration are adapted to solve for the density matrix as a function of time, including the non-unitary effects of dissipation and decoherence. The input requires only solutions of classical, initial value time-dependent equations. Results are illustrated for a damped driven two-level system.

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