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Generation of Fock states in a superconducting quantum circuit

Author

Listed:
  • Max Hofheinz

    (University of California, Santa Barbara, California 93106, USA)

  • E. M. Weig

    (University of California, Santa Barbara, California 93106, USA
    Present address: Ludwig-Maximilians-Universität, Geschwister-Scholl-Platz 1, 80539 München, Germany.)

  • M. Ansmann

    (University of California, Santa Barbara, California 93106, USA)

  • Radoslaw C. Bialczak

    (University of California, Santa Barbara, California 93106, USA)

  • Erik Lucero

    (University of California, Santa Barbara, California 93106, USA)

  • M. Neeley

    (University of California, Santa Barbara, California 93106, USA)

  • A. D. O’Connell

    (University of California, Santa Barbara, California 93106, USA)

  • H. Wang

    (University of California, Santa Barbara, California 93106, USA)

  • John M. Martinis

    (University of California, Santa Barbara, California 93106, USA)

  • A. N. Cleland

    (University of California, Santa Barbara, California 93106, USA)

Abstract

Cavity quantum electrodynamics: Fock states represent quantum purity In cavity quantum electrodynamics (QED), light–matter interactions between a single emitter (an atom or an atom-like system with discrete energy levels) and a resonant optical cavity are investigated at a fundamental level. Recent advances in solid-state implementations, which offer great design flexibility, have given this field considerable momentum. An outstanding important question has been which features in such a system show true quantum behaviour and cannot be explained with classical models. Hofheinz et al. study a 'circuit' QED system where a superconducting qubit acts as an atom-like two-energy level system and is embedded in a microwave transmission circuit, acting as the optical cavity. They demonstrate in this system the creation of pure quantum states, known as Fock states, which give specific numbers of energy quanta, in this case photons. Fock states with up to six photons are prepared and analysed. The results are important because cavity QED is expected to play a crucial role in the development of quantum information processing and communication applications.

Suggested Citation

  • Max Hofheinz & E. M. Weig & M. Ansmann & Radoslaw C. Bialczak & Erik Lucero & M. Neeley & A. D. O’Connell & H. Wang & John M. Martinis & A. N. Cleland, 2008. "Generation of Fock states in a superconducting quantum circuit," Nature, Nature, vol. 454(7202), pages 310-314, July.
    • Handle: RePEc:nat:nature:v:454:y:2008:i:7202:d:10.1038_nature07136
    DOI: 10.1038/nature07136
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    Cited by:

    1. Axel M. Eriksson & Théo Sépulcre & Mikael Kervinen & Timo Hillmann & Marina Kudra & Simon Dupouy & Yong Lu & Maryam Khanahmadi & Jiaying Yang & Claudia Castillo-Moreno & Per Delsing & Simone Gasparine, 2024. "Universal control of a bosonic mode via drive-activated native cubic interactions," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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