Quantum dynamics of a resonator driven by a superconducting single-electron transistor: a solid-state analogue of the micromaser

TL;DR

This paper explores how a quantum resonator coupled to a superconducting single-electron transistor exhibits micromaser-like dynamics, including non-classical states, transitions, and multistability, advancing understanding of solid-state quantum systems.

Contribution

It demonstrates that a superconducting single-electron transistor can induce micromaser-like quantum dynamics in a resonator, revealing new regimes of non-classical states and multistability.

Findings

Resonator exhibits non-classical states of self-sustained oscillation.

Transitions between different dynamical regimes are observed.

Regions of multistability occur at higher coupling strengths.

Abstract

We investigate the behavior of a quantum resonator coupled to a superconducting single-electron transistor tuned to the Josephson quasiparticle resonance and show that the dynamics is similar in many ways to that found in a micromaser. Coupling to the SSET can drive the resonator into non-classical states of self-sustained oscillation via either continuous or discontinuous transitions. Increasing the coupling further leads to a sequence of transitions and regions of multistability.