Dynamic generation of multi-qubit entanglement in the ultrastrong-coupling regime

Xin Liu; Qinghong Liao; Guangyu Fang; Shutian Liu

doi:10.1038/s41598-019-39265-4

Dynamic generation of multi-qubit entanglement in the ultrastrong-coupling regime

Xin Liu^*
, Qinghong Liao
, Guangyu Fang
, Shutian Liu

^*Corresponding author for this work

School of Physics

University of Jinan
Nanchang University
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We propose a dynamic evolution protocol for generating multi-qubit GHZ states in the ultrastrong-coupling regime of circuit QED. By varying the time length of sequences, the protocol works for any coupling strength g/ω _r ≥ 0.25. The time for generating the GHZ states in our protocol can be in the subnanoseconds. By taking into account realistic parameters of circuit QED, the degeneracy of fidelity due to decoherence can be as low as 0.02%.

Original language	English
Article number	2919
Journal	Scientific Reports
Volume	9
Issue number	1
DOIs	https://doi.org/10.1038/s41598-019-39265-4
State	Published - 1 Dec 2019

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title = "Dynamic generation of multi-qubit entanglement in the ultrastrong-coupling regime",

abstract = " We propose a dynamic evolution protocol for generating multi-qubit GHZ states in the ultrastrong-coupling regime of circuit QED. By varying the time length of sequences, the protocol works for any coupling strength g/ω r ≥ 0.25. The time for generating the GHZ states in our protocol can be in the subnanoseconds. By taking into account realistic parameters of circuit QED, the degeneracy of fidelity due to decoherence can be as low as 0.02\%.",

author = "Xin Liu and Qinghong Liao and Guangyu Fang and Shutian Liu",

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AU - Fang, Guangyu

AU - Liu, Shutian

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N2 - We propose a dynamic evolution protocol for generating multi-qubit GHZ states in the ultrastrong-coupling regime of circuit QED. By varying the time length of sequences, the protocol works for any coupling strength g/ω r ≥ 0.25. The time for generating the GHZ states in our protocol can be in the subnanoseconds. By taking into account realistic parameters of circuit QED, the degeneracy of fidelity due to decoherence can be as low as 0.02%.

AB - We propose a dynamic evolution protocol for generating multi-qubit GHZ states in the ultrastrong-coupling regime of circuit QED. By varying the time length of sequences, the protocol works for any coupling strength g/ω r ≥ 0.25. The time for generating the GHZ states in our protocol can be in the subnanoseconds. By taking into account realistic parameters of circuit QED, the degeneracy of fidelity due to decoherence can be as low as 0.02%.

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Dynamic generation of multi-qubit entanglement in the ultrastrong-coupling regime

Abstract

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