期刊论文

Xinwen Wang

英文

Photonics

2304-6732

2022

9

8

583-

10.3390/photonics9080583

Conceptualization, S.T.; methodology, S.T.; software, X.J.; validation, S.T., X.J. and X.Z.; formal analysis, S.T.; investigation, S.T. and X.J.; resources, S.T.; data curation, X.J.; writing—original draft preparation, S.T.; writing—review and editing, X.W. and X.Z.; supervision, X.W. and X.Z.; project administration, S.T.; funding acquisition, S.T. All authors have read and agreed to the published version of the manuscript. This work is supported by the Hunan Provincial Natural Science Foundation of China under Grant Nos. 2020JJ4146 and 2020JJ4002, the Open Fund project of the Key Laboratory of Optoelectronic Control and Detection Technology of University of Hunan Province under Grant No. PC20K02, the open fund project of the Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education under Grant No. QSQC1907, and the Science and Technology Plan Project of Hunan Province under Grant No. 2016TP1020.

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We propose a theoretical model for realizing a photonic two-qubit phase gate in cavity QED using a one-step process. The fidelity and probability of success of the conditional quantum phase gate is very high in the presence of cavity decay. Our scheme only employs one two-level atom, and thus is much simpler than other schemes involving multi-level atoms. This proposal can also be applied to generate two-mode squeezed states; therefore, we give three examples, i.e., the two-mode squeezed vacuum state, two-mode squeezed odd coherent state, and t...