Quantum state tomography of a single electron spin in diamond with Wigner function reconstruction

被引：25

作者：

Chen, Bing ^{[1
,2
]}

Geng, Jianpei ^{[1
]}

Zhou, Feifei ^{[1
]}

Song, Lingling ^{[1
]}

Shen, Heng ^{[3
]}

Xu, Nanyang ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Elect Sci & Appl Phys, Hefei 230009, Anhui, Peoples R China

[2] Shanxi Univ, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Shanxi, Peoples R China

[3] Univ Oxford, Clarendon Lab, Pk Rd, Oxford OX1 3PU, England

来源：

APPLIED PHYSICS LETTERS | 2019年 / 114卷 / 04期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

ENTANGLEMENT;

D O I：

10.1063/1.5082878

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present the experimental reconstruction of the Wigner function of an individual electronic spin qubit associated with a nitrogen-vacancy center in diamond at room temperature. This spherical Wigner function contains the same information as the density matrix for arbitrary spin systems. As an example, we exactly characterize the quantum state of a single qubit undergoing a nearly pure dephasing process by the Wigner function. The fidelities and purities during this process are extracted from the experimentally reconstructed Wigner functions, whose dynamics agree with the theoretical prediction. Published under license by AIP Publishing.

引用

页数：5

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