Superconducting phase qubits

Superconducting phase qubits Experimental progress is reviewed for superconducting phase qubit research at the University of California, Santa Barbara. The phase qubit has a potential advantage of scalability, based on the low impedance of the device and the ability to microfabricate complex “quantum integrated circuits”. Single and coupled qubit experiments, including qubits coupled to resonators, are reviewed along with a discussion of the strategy leading to these experiments. All currently known sources of qubit decoherence are summarized, including energy decay (T 1), dephasing (T 2), and measurement errors. A detailed description is given for our fabrication process and control electronics, which is directly scalable. With the demonstration of the basic operations needed for quantum computation, more complex algorithms are now within reach. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Superconducting phase qubits

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Publisher
Springer Journals
Copyright
Copyright © 2009 by The Author(s)
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/s11128-009-0105-1
Publisher site
See Article on Publisher Site

Abstract

Experimental progress is reviewed for superconducting phase qubit research at the University of California, Santa Barbara. The phase qubit has a potential advantage of scalability, based on the low impedance of the device and the ability to microfabricate complex “quantum integrated circuits”. Single and coupled qubit experiments, including qubits coupled to resonators, are reviewed along with a discussion of the strategy leading to these experiments. All currently known sources of qubit decoherence are summarized, including energy decay (T 1), dephasing (T 2), and measurement errors. A detailed description is given for our fabrication process and control electronics, which is directly scalable. With the demonstration of the basic operations needed for quantum computation, more complex algorithms are now within reach.

Journal

Quantum Information ProcessingSpringer Journals

Published: Feb 18, 2009

References

  • Implementing qubits with superconducting integrated circuits
    Devoret, M.H.; Martinis, J.M.
  • Generation of fock states in a superconducting quantum circuit
    Hofheinz, M.; Weig, E.M.; Ansmann, M.; Bialczak, R.C.; Lucero, E.; Neeley, M.; O’Connell, A.D.; Wang, H.; Martinis, J.M.; Cleland, A.N.
  • Microwave dielectric loss at single photon energies and millikelvin temperatures
    O’Connell, A.D.; Ansmann, M.; Bialczak, R.C.; Hofheinz, M.; Katz, N.; Lucero, E.; McKenney, C.; Neeley, M.; Wang, H.; Weig, E.M.; Cleland, A.N.; Martinis, J.M.
  • Low-frequency noise in dc superconducting quantum interference devices below 1 k
    Wellstood, F.C.; Urbina, C.; Clarke, J.

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