Preparation and entanglement purification of qubits through Zeno-like measurements

Hiromichi Nakazato, Makoto Unoki, and Kazuya Yuasa
Phys. Rev. A 70, 012303 – Published 2 July 2004

Abstract

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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  • Received 25 February 2004

DOI:https://doi.org/10.1103/PhysRevA.70.012303

©2004 American Physical Society

Authors & Affiliations

Hiromichi Nakazato*, Makoto Unoki, and Kazuya Yuasa

  • Department of Physics, Waseda University, Tokyo 169-8555, Japan

  • *Electronic address: hiromici@waseda.jp
  • Electronic address: yuasa@hep.phys.waseda.ac.jp

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Issue

Vol. 70, Iss. 1 — July 2004

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