Non-linear quantum state transformation of spin-1/2

被引：31

作者：

Bechmann-Pasquinucci, H ^{[1
]}

Huttner, B ^{[1
]}

Gisin, N ^{[1
]}

机构：

[1] Univ Geneva, Appl Phys Grp, CH-1211 Geneva 4, Switzerland

来源：

PHYSICS LETTERS A | 1998年 / 242卷 / 4-5期

关键词：

non-linear quantum state transformation; quantum state identification; quantum state purification;

D O I：

10.1016/S0375-9601(98)00189-3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A non-linear quantum scare transformation is presented. The transformation, which operates on pairs of spin-1/2, can be used to distinguish optimally between two non-orthogonal states. Similar transformations applied locally on each component of an entangled pair of spin-1/2 can be used to transform a mixed non-local state into a quasi-pure maximally entangled singlet state. In both cases the transformation makes use of the basic building block of the quantum computer, namely the quantum-XOR gale. (C) 1998 Elsevier Science B.V.

引用

页码：198 / 204

页数：7

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