Quantum constraint dynamics and tracking control of a thermal dissipative qubit | Zendy

Jing-Min Zhu | Zendy; Shun-Jin Wang | Zendy

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Quantum constraint dynamics and tracking control of a thermal dissipative qubit

Author(s) -

Jing-Min Zhu,

Shun-Jin Wang

Publication year - 2006

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.55.5018

Subject(s) - dissipative system , qubit , phase qubit , physics , constraint (computer aided design) , coherence (philosophical gambling strategy) , quantum , charge qubit , thermal reservoir , classical mechanics , quantum mechanics , mathematics , geometry , heat transfer , heat spreader

Quantum constraint dynamics and tracking control strategy to stabilize the coherence of a decoherent system is applied to a dissipative qubit system at a finite temperature. By using a control field dependent on the dynamical state of the qubit through the constraint equations, we show that the quantum state of the qubit can be preserved within a finite time duration by the feedback effect of the qubit system. It is also shown that the temperature plays a negative role in the control strategy.

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