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Quantum logical gates with four-level superconducting quantum interference devices coupled to a superconducting resonator

Source: Phys. Rev. A 82, 024301 (2010); doi:10.1103/PhysRevA.82.024301

Published 4 August 2010

PACS
  • 03.67.Lx
    Quantum computation architectures and implementations
  • 42.50.Dv
    Quantum state engineering and measurements (quantum optics)
  • 85.25.Dq
    Superconducting quantum interference devices (SQUIDs)
  • YEAR: 2010
PUBLICATION DATA
Publisher:
AIP is a member of CrossRef APS
Xiao-Ling He,1 Chui-Ping Yang,2 Sheng Li,3 Jun-Yan Luo,1 and Siyuan Han4
1School of Science, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023, China
2Department of Physics, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
3Department of Physics, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
4Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA
We propose a way for realizing a two-qubit controlled phase gate with superconducting quantum interference devices (SQUIDs) coupled to a superconducting resonator. In this proposal, the two lowest levels of each SQUID serve as the logical states and two intermediate levels of each SQUID are used for the gate realization. We show that neither adjustment of SQUID level spacings during the gate operation nor uniformity in SQUID parameters is required by this proposal. In addition, this proposal does not require the adiabatic passage or a second-order detuning and thus the gate is much faster. ©2010 The American Physical Society
History: Received 21 April 2010; revised 8 July 2010; published 4 August 2010
Permalink: http://link.aps.org/abstract/PRA/v82/e024301
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