Directly Measuring a Multiparticle Quantum Wave Function via Quantum Teleportation

被引：16

作者：

Chen, Ming-Cheng ^{[1
,2
,3
]}

Li, Yuan ^{[1
,2
,3
]}

Liu, Run-Ze ^{[1
,2
,3
]}

Wu, Dian ^{[1
,2
,3
]}

Su, Zu-En ^{[1
,2
,3
]}

Wang, Xi-Lin ^{[1
,2
,3
]}

Li, Li ^{[1
,2
,3
]}

Liu, Nai-Le ^{[1
,2
,3
]}

Lu, Chao-Yang ^{[1
,2
,3
]}

Pan, Jian-Wei ^{[1
,2
,3
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, CAS Ctr Excellence & Synerget Innovat Ctr Quantum, Hefei 230026, Anhui, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 127卷 / 03期

基金：

中国国家自然科学基金;

关键词：

STATE; ENTANGLEMENT;

D O I：

10.1103/PhysRevLett.127.030402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a new method to directly measure a general multiparticle quantum wave function, a single matrix element in a multi-particle density matrix, by quantum teleportation. The density matrix element is embedded in a virtual logical qubit and is nondestructively teleported to a single physical qubit for readout. We experimentally implement this method to directly measure the wave function of a photonic mixed quantum state beyond a single photon using a single observable for the first time. Our method also provides an exponential advantage over the standard quantum state tomography in measurement complexity to fully characterize a sparse multiparticle quantum state.

引用

页数：5

共 40 条

[1]

[Anonymous], 2011, Contemp. Phys.

[2] Deterministic quantum teleportation of atomic qubits [J].