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Open Quantum Systems Decoherence

Protecting Two-Qubit Quantum States by π-Phase Pulses

arXiv

Authors: Jia-Zhong Hu, Xiang-Bin Wang, LC Kwek

Year

2010

Paper ID

10415

Status

Preprint

Abstract Read

~2 min

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Abstract

We study the state decay of two qubits interacted with a common harmonic oscillator reservoir. There are both decoherence error and the error caused by the amplitude change of the superradiant state. We show that frequent π-phase pulses can eliminate both typpes of errors therefore protect a two-qubit odd-parity state more effectively than the frequent measurement method. This shows that the the methods using dynamical decoupling and the quantum Zeno effects actually can give rather {\em different} results when the operation frequency is finite.

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We study the state decay of two qubits interacted with a common harmonic oscillator reservoir.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1011.3460 [2] arXiv https://arxiv.org/abs/1011.3460 [3] Publisher https://arxiv.org/abs/1011.3460

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