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arXiv · 1512.06939

Quantum efficiency of a microwave photon detector based on a double quantum dot

Clement H. Wong·Maxim G. Vavilov
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Abstract

Motivated by recent interest in implementing circuit quantum electrodynamics with semiconducting quantum dots, we consider a double quantum dot (DQD) capacitively coupled to a superconducting resonator that is driven by the microwave field of a superconducting transmission line. We analyze the DQD current response using input-output theory and show that the resonator-coupled DQD is a sensitive microwave single photon detector. Using currently available experimental parameters of DQD-resonator coupling and dissipation, including the effects of $1/f$ charge noise and phonon noise, we determine the parameter regime for which incident photons are completely absorbed and near unit $\gtrsim$ 98\% efficiency can be achieved. We show that this regime can be reached by using very high quality resonators with quality factor $Q\simeq 10^5$.

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Clement H. Wong, Maxim G. Vavilov. 2016-06-15. Quantum efficiency of a microwave photon detector based on a double quantum dot. https://doi.org/10.1103/physreva.95.012325

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