We analytically and numerically study the effects of pulsed control on the decoherence of a qubit coupled to a quantum spin bath. When the environment is critical, decoherence is faster and we show that the control is relatively more effective. Two coupling models are investigated, namely, a qubit coupled to a bath via a single link and a spin-star model, yielding results that are similar and consistent.

Bang-bang control of a qubit coupled to a quantum critical spin bath / Rossini, D; Facchi, P.; Fazio, R.; Florio, G.; Lidar, D. A.; Pascazio, S.; Plastina, F.; Zanardi, P.. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 77:5(2008). [10.1103/PhysRevA.77.052112]

Bang-bang control of a qubit coupled to a quantum critical spin bath

Florio, G.;
2008-01-01

Abstract

We analytically and numerically study the effects of pulsed control on the decoherence of a qubit coupled to a quantum spin bath. When the environment is critical, decoherence is faster and we show that the control is relatively more effective. Two coupling models are investigated, namely, a qubit coupled to a bath via a single link and a spin-star model, yielding results that are similar and consistent.
2008
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.77.052112
Bang-bang control of a qubit coupled to a quantum critical spin bath / Rossini, D; Facchi, P.; Fazio, R.; Florio, G.; Lidar, D. A.; Pascazio, S.; Plastina, F.; Zanardi, P.. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 77:5(2008). [10.1103/PhysRevA.77.052112]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/101714
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