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Open Quantum Systems Decoherence

Quantum speed-up of multiqubit open system via dynamical decoupling pulses

arXiv
Authors: Ya-Ju Song, Qing-Shou Tan, Le-Man Kuang

Year

2015

Paper ID

27720

Status

Preprint

Abstract Read

~2 min

Abstract Words

96

Citations

N/A

Abstract

We present a method to accelerate the dynamical evolution of multiqubit open system by employing dynamical decoupling pulses (DDPs) when the qubits are initially in W-type states. It is found that this speed-up evolution can be achieved in both of the weak-coupling regime and the strong-coupling regime. The physical mechanism behind the acceleration evolution is explained as the result of the joint action of the non-Markovianity of reservoirs and the excited-state population of qubits. It is shown that both of the non-Markovianity and the excited-state population can be controlled by DDPs to realize the quantum speed-up.

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  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
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  • We present a method to accelerate the dynamical evolution of multiqubit open system by employing dynamical decoupling pulses (DDPs) when the qubits are initially in W-type states.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1508.04622 [2] arXiv https://arxiv.org/abs/1508.04622 [3] Publisher https://arxiv.org/abs/1508.04622

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