Generation of multipartite entangled states in Josephson architectures

Rosanna Migliore, Kazuya Yuasa, Hiromichi Nakazato, and Antonino Messina
Phys. Rev. B 74, 104503 – Published 5 September 2006

Abstract

We propose and analyze a scheme for the generation of multipartite entangled states in a system of inductively coupled Josephson flux qubits. The qubits have fixed eigenfrequencies during the whole process in order to minimize decoherence effects and their inductive coupling can be turned on and off at will by tuning an external control flux. Within this framework, we will show that a W state in a system of three or more qubits can be generated by exploiting the sequential one by one coupling of the qubits with one of them playing the role of an entanglement mediator.

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  • Received 11 April 2006

DOI:https://doi.org/10.1103/PhysRevB.74.104503

©2006 American Physical Society

Authors & Affiliations

Rosanna Migliore1,*, Kazuya Yuasa2,†, Hiromichi Nakazato2,‡, and Antonino Messina3,§

  • 1CNR-INFM, MIUR, and Dipartimento di Scienze Fisiche ed Astronomiche dell’Università di Palermo, Via Archirafi 36, I-90123 Palermo, Italy
  • 2Department of Physics, Waseda University, Tokyo 169-8555, Japan
  • 3MIUR and Dipartimento di Scienze Fisiche ed Astronomiche dell’Università di Palermo, Via Archirafi 36, I-90123 Palermo, Italy

  • *Electronic address: rosanna@fisica.unipa.it
  • Present address: Research Center for Information Security, National Institute of Advanced Industrial Science and Technology (AIST), 1-18-13 Sotokanda, Chiyoda-ku, Tokyo 101-0021, Japan; Electronic address: kazuya.yuasa@aist.go.jp
  • Electronic address: hiromici@waseda.jp
  • §Electronic address: messina@fisica.unipa.it

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Issue

Vol. 74, Iss. 10 — 1 September 2006

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