Phys. Rev. A 78, 010305(R) (2008) [4 pages]

Maximally entangling tripartite protocols for Josephson phase qubits

Abstract

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Andrei Galiautdinov^*
Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602, USA

John M. Martinis^†
Department of Physics, University of California, Santa Barbara, California 93106, USA

Received 15 April 2008; published 9 July 2008

We introduce a suit of simple entangling protocols for generating tripartite Greenberger-Horne-Zeilinger and W states in systems with anisotropic exchange interaction g(XX+YY)+g̃ZZ. An interesting example is provided by macroscopic entanglement in Josephson phase qubits with capacitive (g̃=0) and inductive (0<∣g̃∕g∣<0.1) couplings.

URL:

http://link.aps.org/doi/10.1103/PhysRevA.78.010305

DOI:

10.1103/PhysRevA.78.010305

PACS:

03.67.Bg, 03.67.Lx, 85.25.−j

^*ag@physast.uga.edu

^†martinis@physics.ucsb.edu

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Phys. Rev. A 78, 010305(R) (2008) [4 pages]

Maximally entangling tripartite protocols for Josephson phase qubits