Steady-state subradiance manipulated by the two-atom decay

Abstract

We investigate theoretically the collective radiance characteristics of an atomic ensemble with the simultaneous decay of two atoms. We show that the two-atom decay can significantly suppress the steady-state collective radiance of the atoms, expanding the region of subradiance. In the steady-state subradiance regime, the system is in an entangled state, and the mean populations of the system in the excited state and ground state of the atoms are almost equal. The processes of the two-atom decay can be demonstrated by the population distribution of the system state on the Dicke ladder. Moreover, we show the correlation property of the emitted light from the atomic ensemble, where the correlation function is rewritten in the presence of the two-atom decay. We find that the emitted photons of steady state only show bunching in the case of two-atom decay. This work broadens the realm of collective radiance, with potential applications for quantum information processing.

8 pages, 5 figures

References in corpus (17)

• Strong Coupling of a Spin Ensemble to a Superconducting Resonator
• Observation of Resonant Photon Blockade at Microwave Frequencies using Correlation Function Measurements
• A subradiant optical mirror formed by a single structured atomic layer
• Measurements of the Correlation Function of a Microwave Frequency Single Photon Source
• Storing light with subradiant correlations in arrays of atoms
• Protecting a Spin Ensemble against Decoherence in the Strong-Coupling Regime of Cavity QED
• Subradiant Bell states in distant atomic arrays
• Suppressing and restoring the Dicke superradiance transition by dephasing and decay
• Enhanced Quantum Interface with Collective Ion-Cavity Coupling
• Storage and release of subradiant excitations in a dense atomic cloud
• Generating Large Cats with Nine Lives: Long-Lived Macroscopically Distinct Superposition States in Atomic Ensembles
• Subradiance with saturated atoms: population enhancement of the long-lived states
• Subradiance and superradiance-to-subradiance transition in dilute atomic clouds
• Subradiant-to-Subradiant Phase Transition in the Bad Cavity Laser
• Observation of collective decay dynamics of a single Rydberg superatom
• Spatial Coherence of Light in Collective Spontaneous Emission
• Regular and bistable steady-state superradiant phases of an atomic beam traversing an optical cavity

Cited by in corpus (2)

• Deterministic steady-state subradiance within a single-excitation basis
• Bound states and decay dynamics in $N$-level Friedrichs model with factorizable interactions