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Continuous wave single photon transistor based on a superconducting circuit

February 26, 2016 - 12:10pm
Dr. Oleksandr Kyriienko
Niels Bohr Institute, Copenhagen, Denmark

The development of an efficient single microwave photon detector represents the open challenge of circuit QED and typically relies on the time-variation of the control field. Searching for the simple ready-to-go setup, we propose a microwave frequency single photon transistor device which can operate under continuous wave probing. It can be realized using an impedance-matched system of a three level artificial atom coupled to two microwave cavities both connected to input/output waveguides. Using an additional classical drive for the upper transition, we find the parameter space where a single photon control pulse can be fully absorbed by hybridized excited states. This subsequently leads to series of quantum jumps in the upper manifold and appearance of a photon flux leaving the second cavity through a separate input/output port. The resulting device is robust to dephasing processes and possesses low dark count rate.

PSC 2136
College Park, MD 20742