Single-atom maser with engineered circuit for population inversion
- URL: http://arxiv.org/abs/2010.04975v3
- Date: Mon, 21 Dec 2020 21:10:55 GMT
- Title: Single-atom maser with engineered circuit for population inversion
- Authors: A.A. Sokolova, G.P. Fedorov, E.V. Il'ichev and O.V. Astafiev
- Abstract summary: We present a blueprint for a maser with a single three-level transmon superconducting artificial atom.
The system can be pumped coherently via a two-photon process, and to achieve high population inversion, the relaxation rate of the metastable state is increased via an auxiliary low-Q cavity.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We present a blueprint for a maser with a single three-level transmon
superconducting artificial atom. The system can be pumped coherently via a
two-photon process, and to achieve high population inversion, the relaxation
rate of the metastable state is increased via an auxiliary low-Q cavity coupled
to a transition between the transmon excited states. We show numerically that
such a maser can operate both in the intermediate coupling regime with
super-Poissonian photon statistics and in the strong coupling regime, where the
statistics is sub-Poissonian. For the former, the maser exhibits thresholdless
behavior and for the latter, there is a well-defined pumping threshold. A
useful side-effect of the auxiliary resonator is that it allows to overcome the
photon blockade effect for the pump, which would otherwise prevent high photon
population. Finally, we observe the bistability of the steady-state Wigner
function and the self-quenching effect for some parameters.
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