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Direct measurement of two-qubit phononic entangled states via optomechanical interactions |
| A-Peng Liu(刘阿鹏)1,†, Liu-Yong Cheng(程留永)2, Qi Guo(郭奇)3, Shi-Lei Su(苏石磊)4, Hong-Fu Wang(王洪福)5, and Shou Zhang(张寿)5,‡ |
1 Shanxi Institute of Technology, Yangquan 045000, China;
2 School of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030032, China;
3 College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, China;
4 School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China;
5 Department of Physics, College of Science, Yanbian University, Yanji 133002, China |
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Abstract We propose schemes of direct concurrence measurement for two-qubit phononic states from quantized mechanical vibration. By combining the Mach-Zehnder interferometer with the optomechanical cross-Kerr nonlinear effect, direct concurrence measurement schemes for two-qubit phononic entangled states are achieved with the help of photon detection with respect to the output of the interferometer. For different types of entangled states, diversified quantum devices and operations are designed accordingly. The final analysis shows reasonable performance under the current parameter conditions. Our schemes may be useful for potential phonon-based quantum computation and information in the future.
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Received: 05 October 2021
Revised: 17 February 2022
Accepted manuscript online: 14 March 2022
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PACS:
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03.67.-a
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(Quantum information)
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03.67.Hk
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(Quantum communication)
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61801280, 11604190, 11747096, 11804308, and 61465013), the Science and Technologial Innovation Programs of Higher Education Institutions in Shanxi Province, China (Grant Nos. 2019L0988 and 2019L0043), the Fund for Shanxi "1331 Project" Key Subjects Construction (Grant No. 2019XF-04), and the Applied Fundamental Research Project of Yangquan (Grant No. 2019G24). |
Corresponding Authors:
A-Peng Liu, Shou Zhang
E-mail: apliu@sxit.edu.cn;szhang@ybu.edu.cn
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Cite this article:
A-Peng Liu(刘阿鹏), Liu-Yong Cheng(程留永), Qi Guo(郭奇), Shi-Lei Su(苏石磊), Hong-Fu Wang(王洪福), and Shou Zhang(张寿) Direct measurement of two-qubit phononic entangled states via optomechanical interactions 2022 Chin. Phys. B 31 080307
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