Preparation and entanglement purification of qubits through Zeno-like measurements

被引：52

作者：

Nakazato, H ^{[1
]}

Unoki, M ^{[1
]}

Yuasa, K ^{[1
]}

机构：

[1] Waseda Univ, Dept Phys, Tokyo 1698555, Japan

来源：

PHYSICAL REVIEW A | 2004年 / 70卷 / 01期

基金：

日本学术振兴会;

关键词：

D O I：

10.1103/PhysRevA.70.012303

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A method of purification, purification through Zeno-like measurements [ H. Nakazato, T. Takazawa, and K. Yuasa, Phys. Rev. Lett. 90, 060401 (2003) ], is discussed extensively and applied to a few simple qubit systems. It is explicitly demonstrated how it works and how it is optimized. As possible applications, schemes for initialization of multiple qubits and entanglement purification are presented, and their efficiency is investigated in detail. Simplicity and flexibility of the idea allow us to apply it to various kinds of settings in quantum information and computation, and would provide us with useful and practical methods of state preparation.

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收藏

页码：012303 / 1

页数：12

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