Related papers: Overcoming photon blockade in circuit QED single-atom maser with engineered metastability and strong coupling

Overcoming photon blockade in circuit QED single-atom maser with engineered metastability and strong coupling

URL: http://arxiv.org/abs/2209.05165v1
Date: Mon, 12 Sep 2022 11:48:25 GMT
Title: Overcoming photon blockade in circuit QED single-atom maser with engineered metastability and strong coupling
Authors: A.A. Sokolova, D.A. Kalacheva, G.P. Fedorov, O.V. Astafiev
Abstract summary: In this work, we experimentally demonstrate that in a single-atom maser it is possible to pump over a dozen photons into the system. As a confirmation of lasing action, we observe conventional laser features such as the narrowing of emission linewidth and external signal amplification.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Reaching high cavity population with a coherent pump in the strong-coupling regime of a single-atom laser is impossible due to the photon blockade effect. In this work, we experimentally demonstrate that in a single-atom maser based on a transmon strongly coupled to two resonators it is possible to pump over a dozen of photons into the system. The first high-quality resonator plays a role of usual lasing cavity, and the second one presents a controlled dissipation channel, bolstering population inversion, and modifies the energy level structure to lift the blockade. As a confirmation of lasing action, we observe conventional laser features such as the narrowing of emission linewidth and external signal amplification. Additionally, we report unique single-atom features: self-quenching and several lasing thresholds.

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