Optimizing quantum process tomography with unitary 2-designs

被引：85

作者：

Scott, A. J. ^{[1
,2
]}

机构：

[1] Griffith Univ, Ctr Quantum Dynam, Brisbane, Qld 4111, Australia

[2] Griffith Univ, Ctr Quantum Comp Technol, Brisbane, Qld 4111, Australia

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL | 2008年 / 41卷 / 05期

关键词：

D O I：

10.1088/1751-8113/41/5/055308

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that weighted unitary 2-designs define optimal measurements on the system-ancilla output state for ancilla-assisted process tomography of unital quantum channels. Examples include complete sets of mutually unbiased unitary-operator bases. Each of these specifies a minimal series of optimal orthogonal measurements. General quantum channels are also considered.

引用

页数：26

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