2020/10/31 by А. Соколова, A. A. Sokolova, Gleb Fedorov +4 · 12 citations
Computer Science · Physics and Astronomy · #Atomic physics #Bistability #Cold Atom Physics and Bose-Einstein Condensates #Excited state #Laser #Maser #Mechanical and Optical Resonators #Metastability #Optics #Photon #Physics #Population #Population inversion #Quantum Information and Cryptography #Quantum mechanics #Qubit #Transmon #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.1103/physreva.103.013718
published in Physical Review A 103(1) (American Physical Society)
arxiv created 2020/12/21 · openalex publication_date 2021/01/14 · arxiv updated 2021/01/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 a high photon population. Finally, we observe the bistability of the steady-state Wigner function and the self-quenching effect for some parameters.