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Resolving photon number states in a superconducting circuit

Author

Listed:
  • D. I. Schuster

    (Yale University)

  • A. A. Houck

    (Yale University)

  • J. A. Schreier

    (Yale University)

  • A. Wallraff

    (Yale University
    ETH Zurich)

  • J. M. Gambetta

    (Yale University)

  • A. Blais

    (Yale University
    Université de Sherbrooke)

  • L. Frunzio

    (Yale University)

  • J. Majer

    (Yale University)

  • B. Johnson

    (Yale University)

  • M. H. Devoret

    (Yale University)

  • S. M. Girvin

    (Yale University)

  • R. J. Schoelkopf

    (Yale University)

Abstract

Count on qubits In cavity quantum electrodynamics (QED), atoms or quantum dots are made to strongly interact with single photons. Recent work showed that a regime of 'strong coupling' can be obtained, where a single photon is absorbed and re-emitted many times. Schuster et al. have built a special type of cavity QED system that is embedded within an electronic circuit; in it a superconducting quantum bit (qubit) interacts with photons from a microwave transmission line. A novel regime can be produced in this system, namely the strong dispersive limit, where a single photon has a large effect on the qubit without being absorbed. This opens the possibility of nondestructive counting of photons that are present in the cavity. This effect could be used as a basis for qubit–photon conditional logic, a requirement for quantum computing.

Suggested Citation

  • D. I. Schuster & A. A. Houck & J. A. Schreier & A. Wallraff & J. M. Gambetta & A. Blais & L. Frunzio & J. Majer & B. Johnson & M. H. Devoret & S. M. Girvin & R. J. Schoelkopf, 2007. "Resolving photon number states in a superconducting circuit," Nature, Nature, vol. 445(7127), pages 515-518, February.
    • Handle: RePEc:nat:nature:v:445:y:2007:i:7127:d:10.1038_nature05461
    DOI: 10.1038/nature05461
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    Cited by:

    1. Germain Tobar & Sreenath K. Manikandan & Thomas Beitel & Igor Pikovski, 2024. "Detecting single gravitons with quantum sensing," Nature Communications, Nature, vol. 15(1), pages 1-14, December.

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