Refocusing of a qubit system coupled to an oscillator

Details Refocusing of a qubit system coupled to an oscillator Refocusing of a qubit system coupled to an oscillator

2007-06-04

arxiv.org/abs/0706.0501v1

Physics

Quantum Physics

2.5pages Conference proceedings for Nanostructures: Physics and Technology, Novosibirsk (2007). Macros file nano2cmr.sty inclu

Scientific paper

Refocusing, or dynamical decoupling, is a coherent control technique where the internal dynamics of a quantum system is effectively averaged out by an application of specially designed driving fields. The method has originated in nuclear magnetic resonance, but it was independently discovered in atomic physics as a ``coherent destruction of tunneling''. Present work deals with the analysis of the performance of ``soft'' refocusing pulses and pulse sequences in protecting the coherence of a qubit system coupled to a quantum oscillator.

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