Macroscopic Greenberger-Horne-Zeilinger and W states in flux qubits

Kim, Mun Dae and Cho, Sam Young (2008) Macroscopic Greenberger-Horne-Zeilinger and W states in flux qubits. Physical Review B, 77 10: Article Number: 100508. doi:10.1103/PhysRevB.77.100508

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Author Kim, Mun Dae
Cho, Sam Young
Title Macroscopic Greenberger-Horne-Zeilinger and W states in flux qubits
Formatted title
Macroscopic Greenberger-Horne-Zeilinger and W states in flux qubits
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
Publication date 2008-03-26
Sub-type Article (original research)
DOI 10.1103/PhysRevB.77.100508
Open Access Status File (Publisher version)
Volume 77
Issue 10
Start page Article Number: 100508
Total pages 4
Editor P.D. Adams
Place of publication College Park, Maryland, USA
Publisher American Physical Society
Language eng
Subject C1
970102 Expanding Knowledge in the Physical Sciences
020699 Quantum Physics not elsewhere classified
Abstract We investigate two types of genuine three-qubit entanglement, known as the Greenberger-Horne-Zeilinger (GHZ) and W states, in a macroscopic quantum system. Superconducting flux qubits are theoretically considered in order to generate such states. A phase coupling is proposed to offer enough strength of interactions between qubits. While an excited state can be the W state, the GHZ state is formed at the ground state of the three flux qubits. The GHZ and W states are shown to be robust against external flux fluctuations for feasible experimental realizations.
Keyword excited states
ground states
Josephson effect
quantum computing
quantum entanglement
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 23 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 25 times in Scopus Article | Citations
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Created: Tue, 31 Mar 2009, 21:09:46 EST by Jo Hughes on behalf of School of Mathematics & Physics