Ideal two-mode phase sensitive quantum amplifier: theory

ORAL

Abstract

Quantum-limited amplifiers are crucial for the processing of sensitive quantum information in the microwave world. The textbook (phase-sensitive) quantum-limited amplifier is a degenerate parametric amplifier with just a single mode, which comes with the disadvantage of having a fixed gain-bandwidth product and of no separation between input and output ports. One would think that adding a second mode to get separation between these ports would always be detrimental, as one introduces an extra degree of freedom and therewith extra noise. Here, we show this is not the case: one can have a two-mode phase-sensitive amplifier that is ideal with respect to a number of metrics: it has distinct input and output ports, no reflection gain, is quantum-limited and it does not suffer from a gain-bandwidth limit. Consequently it is more robust to pump-depletion effects. In addition, the here presented phase-sensitive amplifier produces squeezed output light with an enhanced bandwidth compared to single-mode squeezing setups. The proposed setup could easily be implemented in a range of different superconducting circuit architectures.

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Presenters

  • Anja Metelmann

    Physics, Freie Universitaet Berlin, Dahlem Center for Complex Quantum Systems and Department of Physics, Free University Berlin, Princeton University, Physics, Free University Berlin

Authors

  • Anja Metelmann

    Physics, Freie Universitaet Berlin, Dahlem Center for Complex Quantum Systems and Department of Physics, Free University Berlin, Princeton University, Physics, Free University Berlin

  • Olivia Lanes

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh

  • Tzu-Chiao Chien

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Xi Cao

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Gangqiang Liu

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Chenxu Liu

    Department of Physics and Astronomy, University of Pittsburgh

  • David Pekker

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Jose Aumentado

    NIST Boulder, Boulder, National Institute of Standards and Technology

  • Michael Hatridge

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Aashish Clerk

    Institute for Molecular Engineering, University Of Chicago, Molecular Engineering, Institute for Molecular Engineering at the University of Chicago, Institute for Molecular Engineering, University of Chicago, University of Chicago