Random Lindblad equations from complex environments

Details Random Lindblad equations from complex environments Random Lindblad equations from complex environments

2005-10-12

arxiv.org/abs/quant-ph/0510085v1

Phys. Rev E 72, 056106 (2005)

Physics

Quantum Physics

11 pages, 4 figures, to be published in PRE

Scientific paper

10.1103/PhysRevE.72.056106

In this paper we demonstrate that Lindblad equations characterized by a random rate variable arise after tracing out a complex structured reservoir. Our results follows from a generalization of the Born-Markov approximation, which relies in the possibility of splitting the complex environment in a direct sum of sub-reservoirs, each one being able to induce by itself a Markovian system evolution. Strong non-Markovian effects, which microscopically originate from the entanglement with the different sub-reservoirs, characterize the average system decay dynamics. As an example, we study the anomalous irreversible behavior of a quantum tunneling system described in an effective two level approximation. Stretched exponential and power law decay behaviors arise from the interplay between the dissipative and unitary hopping dynamics.

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