Quantum Zeno effect with a superconducting qubit

Y. Matsuzaki; S. Saito; K. Kakuyanagi; K. Semba

doi:10.1103/PhysRevB.82.180518

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Quantum Zeno effect with a superconducting qubit

Y. Matsuzaki, S. Saito, K. Kakuyanagi, K. Semba

DOI 10.1103/PhysRevB.82.180518 · Physical Review B

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Abstract

Detailed schemes are investigated for experimental verification of Quantum Zeno effect with a superconducting qubit. A superconducting qubit is affected by a dephasing noise whose spectrum is 1/f and so the decay process of a superconducting qubit shows a naturally nonexponential behavior due to an infinite correlation time of 1/f noise. Since projective measurements can easily influence the decay dynamics having such nonexponential feature, a superconducting qubit is a promising system to observe quantum Zeno effect. We have studied how a sequence of projective measurements can change the dephasing process and also we have suggested experimental ways to observe quantum Zeno effect with a superconducting qubit. It would be possible to demonstrate our prediction in the current technology.