4.5 Article

Quantum Metamaterial for Broadband Detection of Single Microwave Photons

Journal

PHYSICAL REVIEW APPLIED
Volume 15, Issue 3, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.15.034074

Keywords

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Funding

  1. Australian Research Council (ARC) via Centre of Excellence in Engineered Quantum Systems (EQUS) [CE170100009]
  2. Australian Research Council (ARC) via Discovery Early Career Researcher Award [DE190100380]
  3. Army Research Office [W911NF-15-1-0421]
  4. NSERC
  5. Vanier Canada Graduate Scholarship
  6. Canada First Research Excellence Fund
  7. MIT Center for Quantum Engineering from the Laboratory for Physical Sciences [H9823019-C-0292]
  8. Australian Research Council [DE190100380] Funding Source: Australian Research Council

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The paper introduces a single-photon detector design operating in the microwave domain, based on weakly nonlinear metamaterial for high-accuracy single-photon detection and large detection bandwidth. This design offers promising possibilities for the development of quantum information processing, quantum optics, and metrology.
Detecting traveling photons is an essential primitive for many quantum-information processing tasks. We introduce a single-photon detector design operating in the microwave domain, based on a weakly nonlinear metamaterial where the nonlinearity is provided by a large number of Josephson junctions. The combination of weak nonlinearity and large spatial extent circumvents well-known obstacles limiting approaches based on a localized Kerr medium. Using numerical many-body simulations we show that the single-photon detection fidelity increases with the length of the metamaterial to approach one at experimentally realistic lengths. A remarkable feature of the detector is that the metamaterial approach allows for a large detection bandwidth. The detector is nondestructive and the photon population wavepacket is minimally disturbed by the detection. This detector design offers promising possibilities for quantum information processing, quantum optics and metrology in the microwave frequency domain.

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