Observation of geometric phase in a dispersively coupled resonator-qutrit system

doi:10.1088/1674-1056/27/7/070303

中国物理B ›› 2018, Vol. 27 ›› Issue (7): 70303-070303.doi: 10.1088/1674-1056/27/7/070303

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

Observation of geometric phase in a dispersively coupled resonator-qutrit system

Libo Zhang(张礼博), Chao Song(宋超), H Wang(王浩华), Shi-Biao Zheng(郑仕标)

1 Department of Physics, Zhejiang University, Hangzhou 310027, China;
2 Fujian Key Laboratory of Quantum Information and Quantum Optics, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, China

收稿日期:2018-03-04 修回日期:2018-04-26 出版日期:2018-07-05 发布日期:2018-07-05
通讯作者: H Wang, Shi-Biao Zheng E-mail:hhwang@zju.edu.cn;t96034@fzu.edu.cn
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2014CB921201) and the National Natural Science Foundation of China (Grant Nos. 11434008 and 11574380).

Observation of geometric phase in a dispersively coupled resonator-qutrit system

Libo Zhang(张礼博)¹, Chao Song(宋超)¹, H Wang(王浩华)¹, Shi-Biao Zheng(郑仕标)²

1 Department of Physics, Zhejiang University, Hangzhou 310027, China;
2 Fujian Key Laboratory of Quantum Information and Quantum Optics, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, China

Received:2018-03-04 Revised:2018-04-26 Online:2018-07-05 Published:2018-07-05
Contact: H Wang, Shi-Biao Zheng E-mail:hhwang@zju.edu.cn;t96034@fzu.edu.cn
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2014CB921201) and the National Natural Science Foundation of China (Grant Nos. 11434008 and 11574380).

摘要/Abstract

摘要：

We present an experiment of observing the geometric phase in a superconducting circuit where the resonator and the qutrit energy levels are dispersively coupled. The drive applied to the resonator displaces its state components associated with the qutrit's ground state and first-excited state along different circular trajectories in phase space. We identify the resonator's phase-space trajectories by Wigner tomography using an ancilla qubit, following which we observe the difference between the geometric phases associated with these trajectories using Ramsey interferometry. This geometric phase is further used to construct the single-qubit π-phase gate with a process fidelity of 0.851±0.001.

关键词: geometric phase, superconducting circuit, Wigner tomography

Abstract:

Key words: geometric phase, superconducting circuit, Wigner tomography

中图分类号: (Phases: geometric; dynamic or topological)

03.65.Vf

03.67.Lx (Quantum computation architectures and implementations) 42.50.Pq (Cavity quantum electrodynamics; micromasers)

张礼博, 宋超, 王浩华, 郑仕标. Observation of geometric phase in a dispersively coupled resonator-qutrit system[J]. 中国物理B, 2018, 27(7): 70303-070303.

Libo Zhang(张礼博), Chao Song(宋超), H Wang(王浩华), Shi-Biao Zheng(郑仕标). Observation of geometric phase in a dispersively coupled resonator-qutrit system[J]. Chin. Phys. B, 2018, 27(7): 70303-070303.

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Observation of geometric phase in a dispersively coupled resonator-qutrit system

Observation of geometric phase in a dispersively coupled resonator-qutrit system

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