Implementation of quantum phase gate between two atoms via Rydberg antiblockade and adiabatic passage

doi:10.1088/1674-1056/27/10/100307

中国物理B ›› 2018, Vol. 27 ›› Issue (10): 100307-100307.doi: 10.1088/1674-1056/27/10/100307

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Implementation of quantum phase gate between two atoms via Rydberg antiblockade and adiabatic passage

Xi Tan(谭曦), Jin-Lei Wu(吴金雷), Can Deng(邓灿), Wei-Jian Mao(毛伟建), Hai-Tao Wang(王海涛), Xin Ji(计新)

Department of Physics, College of Science, Yanbian University, Yanji 133002, China

收稿日期:2018-06-01 修回日期:2018-07-17 出版日期:2018-10-05 发布日期:2018-10-05
通讯作者: Xin Ji E-mail:jixin@ybu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11464046).

Implementation of quantum phase gate between two atoms via Rydberg antiblockade and adiabatic passage

Xi Tan(谭曦), Jin-Lei Wu(吴金雷), Can Deng(邓灿), Wei-Jian Mao(毛伟建), Hai-Tao Wang(王海涛), Xin Ji(计新)

Department of Physics, College of Science, Yanbian University, Yanji 133002, China

Received:2018-06-01 Revised:2018-07-17 Online:2018-10-05 Published:2018-10-05
Contact: Xin Ji E-mail:jixin@ybu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11464046).

摘要/Abstract

摘要：

Combining adiabatic passage and Rydberg antiblockade, we propose a scheme to implement a two-qubit phase gate between two Rydberg atoms. Detuning parameters between frequencies of atomic transitions and those of the corresponding driving lasers are carefully chosen to offset the blockade effect of two Rydberg atoms, so that an effective Hamiltonian, representing a single-photon detuning Λ-type three-level system and concluding the quantum state of two Rydberg atoms excited simultaneously, is obtained. The adiabatic-passage technique, based on the effective Hamiltonian, is adopted to implement a two-atom phase gate by using two time-dependent Rabi frequencies. Numerical simulations indicate that a high-fidelity two-qubit π-phase gate is constructed and its operation time does not have to be controlled accurately. Besides, owing to the long coherence time of the Rydberg state, the phase gate is robust against atomic spontaneous emission.

关键词: quantum phase gate, Rydberg antiblockade, adiabatic passage

Abstract:

Key words: quantum phase gate, Rydberg antiblockade, adiabatic passage

中图分类号: (Entanglement production and manipulation)

03.67.Bg

42.50.Dv (Quantum state engineering and measurements) 42.50.Ex (Optical implementations of quantum information processing and transfer)

谭曦, 吴金雷, 邓灿, 毛伟建, 王海涛, 计新. Implementation of quantum phase gate between two atoms via Rydberg antiblockade and adiabatic passage[J]. 中国物理B, 2018, 27(10): 100307-100307.

Xi Tan(谭曦), Jin-Lei Wu(吴金雷), Can Deng(邓灿), Wei-Jian Mao(毛伟建), Hai-Tao Wang(王海涛), Xin Ji(计新). Implementation of quantum phase gate between two atoms via Rydberg antiblockade and adiabatic passage[J]. Chin. Phys. B, 2018, 27(10): 100307-100307.

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Implementation of quantum phase gate between two atoms via Rydberg antiblockade and adiabatic passage

Implementation of quantum phase gate between two atoms via Rydberg antiblockade and adiabatic passage

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