Theoretical comparison of quantum Zeno gates and logic gates based on the cross-Kerr nonlinearity

Theoretical comparison of quantum Zeno gates and logic gates based on the cross-Kerr nonlinearity Quantum logic operations can be implemented using nonlinear phase shifts (the Kerr effect) or the quantum Zeno effect based on strong two-photon absorption. Both approaches utilize three-level atoms, where the upper level is tuned on resonance for the Zeno gates and off-resonance for the nonlinear phase gates. The performance of nonlinear phase gates and Zeno gates are compared under conditions where the parameters of the resonant cavities and three-level atoms are the same in both cases. It is found that the expected performance is comparable for the two approaches despite the fundamental differences between the Zeno and Kerr effects. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Theoretical comparison of quantum Zeno gates and logic gates based on the cross-Kerr nonlinearity

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Publisher
Springer US
Copyright
Copyright © 2011 by Springer Science+Business Media, LLC
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-011-0318-y
Publisher site
See Article on Publisher Site

Abstract

Quantum logic operations can be implemented using nonlinear phase shifts (the Kerr effect) or the quantum Zeno effect based on strong two-photon absorption. Both approaches utilize three-level atoms, where the upper level is tuned on resonance for the Zeno gates and off-resonance for the nonlinear phase gates. The performance of nonlinear phase gates and Zeno gates are compared under conditions where the parameters of the resonant cavities and three-level atoms are the same in both cases. It is found that the expected performance is comparable for the two approaches despite the fundamental differences between the Zeno and Kerr effects.

Journal

Quantum Information ProcessingSpringer Journals

Published: Nov 3, 2011

References

  • Demonstration of two-qubit algorithms with a superconducting quantum processor
    DiCarlo, L.; Chow, J.M.; Gambetta, J.M.; Bishop, L.S.; Johnson, B.R.; Schuster, D.I.; Majer, J.; Blais, A.; Frunzio, L.; Girvin, S.M.; Schoelkopf, R.J.
  • Quantum computation with quantum dots
    Loss, D.; DiVincenzo, D.P.
  • Ultra-high-Q toroid microcavity on a chip
    Armani, D.K.; Kippenberg, T.J.; Spillane, S.M.; Vahala, K.J.
  • Fabrication and coupling to planar high-Q silica disk microcavities
    Kippenberg, T.J.; Spillane, S.M.; Armani, D.K.; Vahala, K.J.

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