Triggered Superradiance and Inversion Storage in a Hybrid Quantum System

Abstract

We study the superradiant emission of an inverted spin ensemble strongly coupled to a superconducting cavity. After fast inversion, we detune the spins from the cavity and store the inversion for tens of milliseconds, during which the remaining transverse spin components disappear. Switching back on resonance enables us to study the onset of superradiance. A weak trigger pulse of a few hundred photons shifts the superradiant burst to earlier times and imprints its phase onto the emitted radiation. For long hold times, the inversion decreases below the threshold for spontaneous superradiance. There, the energy stored in the ensemble can be used to amplify microwave pulses passing through the cavity.

References in corpus (5)

• Superabsorption in an organic microcavity: towards a quantum battery
• Depolarization dynamics in a strongly interacting solid-state spin ensemble
• A photonic quantum engine driven by superradiance
• Dissipative superradiant spin amplifier for enhanced quantum sensing
• Observation of coherent coupling between super- and subradiant states of an ensemble of cold atoms collectively coupled to a single propagating optical mode

Cited by in corpus (5)

• Dicke superradiance in ordered arrays of multilevel atoms
• Quantum Fluctuation Dynamics of Dispersive Superradiant Pulses in a Hybrid Light-Matter System
• Self-Induced Superradiant Masing
• Quantum correlated steady states under competing collective and individual decay
• Initiation of Superradiance from Different Collective-Spin States