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Decoherence control: A feedback mechanism based on hamiltonian tracking

Gil Katz·Mark Ratner·Ronnie Kosloff
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Abstract

Enviroment - caused dissipation disrupts the hamiltonian evolution of all quantum systems not fully isolated from any bath. We propose and examine a feedback-control scheme to eliminate such dissipation, by tracking the free hamiltonian evolution. We determine a driving-field that maximizes the projection of the actual molecular system onto the freely propagated one. The evolution of a model two level system in a dephasing bath is followed, and the driving field that overcomes the decoherence is calculated. An implementation of the scheme in the laboratory using feedback control is suggested.

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Gil Katz, Mark Ratner, Ronnie Kosloff. 2006-03-02. Decoherence control: A feedback mechanism based on hamiltonian tracking. https://arxiv.org/abs/quant-ph/0603021

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