Perfect Microwave Photodetection in Circuit QED

Details Perfect Microwave Photodetection in Circuit QED Perfect Microwave Photodetection in Circuit QED

2010-12-29

arxiv.org/abs/1101.0016v1

Phys. Rev. A 84, 063834 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevA.84.063834

In this work we propose a microwave photon detector which successfully reaches 100% efficiency with only one absorber. Our design consists of a metastable quantum circuit coupled to a semi-infinite transmission line which performs highly efficient photodetection in a simplified manner as compared to previous proposals. We extensively study the scattering properties of realistic wavepackets against this device, thereby computing the efficiency of the detector. We find that the detector has many operating modes, can detect detuned photons, is robust against design imperfections and can be made broadband by using more than one absorbing element in the design.

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