Universal Dynamical Control of Local Decoherence for Multipartite and Multilevel Systems

Details Universal Dynamical Control of Local Decoherence for Multipartite and Multilevel Systems Universal Dynamical Control of Local Decoherence for Multipartite and Multilevel Systems

2006-08-23

arxiv.org/abs/quant-ph/0608175v1

Optics Communications 264, 398 (2006)

Physics

Quantum Physics

22 pages, 6 figures

Scientific paper

10.1016/j.optcom.2006.01.062

A unified theory is given of dynamically modified decay and decoherence of field-driven multilevel multipartite entangled states that are weakly coupled to zero-temperature baths or undergo random phase fluctuations. The theory allows for arbitrary local differences in their coupling to the environment. Due to such differences, the optimal driving-field modulation to ensure maximal fidelity is found to substantially differ from conventional ``Bang-Bang'' or $\pi$-phase flips of the single-qubit evolution.

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