Control of Decoherence: Dynamical Decoupling versus Quantum Zeno Effect - a case study for trapped ions

Details Control of Decoherence: Dynamical Decoupling versus Quantum Zeno Effect - a case study for trapped ions Control of Decoherence: Dynamical Decoupling versus Quantum Zeno Effect - a case study for trapped ions

2002-10-17

arxiv.org/abs/quant-ph/0210129v1

Int. J. Quant. Chem. 98 (2004) 160

Physics

Quantum Physics

24 pages, 8 figures

Scientific paper

10.1002/qua.10870

The control of thermal decoherence via dynamical decoupling and via the quantum Zeno effect (Zeno control) is investigated for a model of trapped ion, where the dynamics of two low lying hyperfine states undergoes decoherence due to the thermal interaction with an excited state. Dynamical decoupling is a procedure that consists in periodically driving the excited state, while the Zeno control consists in frequently measuring it. When the control frequency is high enough, decoherence is shown to be suppressed. Otherwise, both controls may accelerate decoherence.

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