Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série LPA
Domaines cond-mat
Date Mercredi 15 Novembre 2017
Heure 13:30
Institut LPA
Salle L363-365
Nom de l'orateur Lin
Prenom de l'orateur Zhirong
Addresse email de l'orateur
Institution de l'orateur RIKEN, JAPAN
Titre Single microwave-photon detector using an artificial \lambda-type three-level system
Résumé Single-photon detection is a requisite technique in quantum-optics experiments in both the optical and the microwave domains. However, the energy of microwave quanta are four to five orders of magnitude less than their optical counterpart, making the efficient detection of single microwave photons extremely challenging. Here we demonstrate the detection of a single microwave photon propagating through a waveguide. The detector is implemented with an impedance-matched artificial Λ system comprising the dressed states of a driven superconducting qubit coupled to a microwave resonator. Each signal photon deterministically induces a Raman transition in the Λ system and excites the qubit. The subsequent dispersive readout of the qubit produces a discrete ‘click’. We attain a high single-photon-detection efficiency of 0.66±0.06 with a low dark-count probability of 0.014±0.001 and a reset time of ∼400 ns. This detector can be exploited for various applications in quantum sensing, quantum communication and quantum information processing.
Numéro de preprint arXiv
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