Dressed-state engineering for continuous detection of itinerant microwave photons
Kazuki Koshino, Zhirong Lin, Kunihiro Inomata, Tsuyoshi Yamamoto, and, Yasunobu Nakamura
TL;DR
This paper introduces a superconducting circuit scheme for continuous, high-efficiency detection of traveling microwave photons using a dispersively coupled qubit and resonators, achieving 90% efficiency.
Contribution
It presents a novel impedance-matched Lambda system design for deterministic photon capture and continuous monitoring in circuit QED.
Findings
Detection efficiency reaches 0.9 with realistic parameters
Bandwidth of about ten megahertz
Enables continuous microwave photon detection
Abstract
We propose a scheme for continuous detection of itinerant microwave photons in circuit quantum electrodynamics. In the proposed device, a superconducting qubit is coupled dispersively to two resonators: one is used to form an impedance-matched system that deterministically captures incoming photons, and the other is used for continuous monitoring of the event. The present scheme enables efficient photon detection: for realistic system parameters, the detection efficiency reaches 0.9 with a bandwidth of about ten megahertz.
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum Computing Algorithms and Architecture · Quantum and electron transport phenomena