Realization of entanglement-assisted qubit-covariant symmetric-informationally-complete positive-operator-valued measurements

被引：18

作者：

Du, Jiangfeng ^{[1
]}

Sun, Min

Peng, Xinhua

Durt, Thomas

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 Dortmund, Fachbereich Phys, D-44221 Dortmund, Germany

[4] Free Univ Brussels, TONA TENA, B-1050 Brussels, Belgium

来源：

PHYSICAL REVIEW A | 2006年 / 74卷 / 04期

关键词：

22;

D O I：

10.1103/PhysRevA.74.042341

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We realize NMR optimal tomography of a single qubit by coupling it to an ancilla, letting them interact, and measuring properties of the joint system. Among other advantages, this approach reduces the number of counting rates that are necessary for establishing tomography of the qubit, due to the fact that this number (equal to 4) is equal to the number of real parameters of the density matrix. Connections with the discrete Wigner distribution are emphasized and discussed.

引用

页数：4

共 33 条

[31] Realization of positive-operator-valued measures using measurement-assisted programmable quantum processors (vol 72, pg 022343, 2005)
Ziman, M
Buzek, V
PHYSICAL REVIEW A, 2005, 72 (03):
[32] On approximately symmetric informationally complete positive operator-valued measures and related systems of quantum states -: art. no. 082104
Klappenecker, A
Rötteler, M
Shparlinski, IE
Winterhof, A
JOURNAL OF MATHEMATICAL PHYSICS, 2005, 46 (08)
[33] Measuring the local efficiency of symmetric informationally complete positive operator-valued measures in two-level systems with the density of quantum states
Xing, Hai-Jun
PHYSICAL REVIEW A, 2025, 111 (02)

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