We propose to implement a hybrid multi-qubit quantum phase gate based on a setup comprising multiple microwave cavities coupled to a common superconducting transmon qutrit in the circuit quantum electrodynamics. The function of this hybrid quantum phase gate is that a phase related to the total number of cavities in non-vacuum state will be introduced when the transmon qubit is in an excited state. Furthermore, we propose an application, quantum voting machine, with this hybrid quantum gate. This scheme is scalable and simple to operate, requiring just a single step and necessitating only the reading of quantum states of one target qubit. While for quantum voting machine, it ensures the verifiability of the voting results through the measurement of the phase information of the target qubit. Additionally, the anonymity of the voters is ensured as the voting outcome is solely tied to the total number of affirmative votes. Numerical simulations indicate the feasibility of this hybrid quantum gate and quantum voting machine within the current quantum technology.
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28 October 2024
Research Article|
October 30 2024
Realization of a hybrid multi-qubit quantum phase gate in circuit QED
Yu Zhang
;
Yu Zhang
(Conceptualization, Data curation, Formal analysis, Methodology, Writing – original draft, Writing – review & editing)
1
National Laboratory of Solid State Microstructures, School of Physics, Nanjing University
, Nanjing 210093, China
2
Shishan Laboratory, Nanjing University
, Suzhou 215163, China
3
Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China
, Hefei, Anhui 230026, China
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Qiping Su
;
Qiping Su
(Data curation, Writing – review & editing)
4
School of Physics, Hangzhou Normal University
, Hangzhou 311121, China
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Yihao Kang
;
Yihao Kang
(Data curation, Writing – review & editing)
4
School of Physics, Hangzhou Normal University
, Hangzhou 311121, China
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Wen Zheng
;
Wen Zheng
(Data curation, Writing – review & editing)
1
National Laboratory of Solid State Microstructures, School of Physics, Nanjing University
, Nanjing 210093, China
2
Shishan Laboratory, Nanjing University
, Suzhou 215163, China
3
Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China
, Hefei, Anhui 230026, China
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Shaoxiong Li
;
Shaoxiong Li
a)
(Supervision, Writing – review & editing)
1
National Laboratory of Solid State Microstructures, School of Physics, Nanjing University
, Nanjing 210093, China
2
Shishan Laboratory, Nanjing University
, Suzhou 215163, China
3
Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China
, Hefei, Anhui 230026, China
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Chuiping Yang
;
Chuiping Yang
(Data curation, Writing – review & editing)
4
School of Physics, Hangzhou Normal University
, Hangzhou 311121, China
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Yang Yu
Yang Yu
a)
(Funding acquisition, Project administration, Resources, Supervision)
1
National Laboratory of Solid State Microstructures, School of Physics, Nanjing University
, Nanjing 210093, China
2
Shishan Laboratory, Nanjing University
, Suzhou 215163, China
3
Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China
, Hefei, Anhui 230026, China
5
Hefei National Laboratory
, Hefei 230088, China
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Appl. Phys. Lett. 125, 184002 (2024)
Article history
Received:
July 08 2024
Accepted:
October 23 2024
Citation
Yu Zhang, Qiping Su, Yihao Kang, Wen Zheng, Shaoxiong Li, Chuiping Yang, Yang Yu; Realization of a hybrid multi-qubit quantum phase gate in circuit QED. Appl. Phys. Lett. 28 October 2024; 125 (18): 184002. https://doi.org/10.1063/5.0227281
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