Abstract
Hyperradiance in which radiation rate exceeds that of superradiance has been theoretically investigated in various coherently-coupled emitter-field systems. In most cases, either proposed setups were experimentally challenging or the mean photon number in a cavity was limited. In this paper, with numerical simulations and analytic calculations, we demonstrate that significant hyperradiance with a large mean photon number can occur in a microlaser system, where pairs of two-level atoms prepared in quantum superposition states traverse a high-Q cavity in the presence of a pump field intersecting the cavity mode. Hyperradiance is induced when the intracavity-pump Rabi frequency is out of phase with respect to the atom-cavity coupling so that the reduction of atomic polarization by the atom-cavity coupling is compensated by the pump Rabi frequency in the steady state to maximize atomic photoemission.
Highlights
Hyperradiance in which radiation rate exceeds that of superradiance has been theoretically investigated in various coherently-coupled emitter-field systems
With numerical simulations and analytic calculations, we demonstrate that significant hyperradiance can occur when a pump field intersecting the cavity mode is introduced with opposite phase to the atom-cavity coupling
The pump Rabi frequency counteracts the atom-cavity coupling and keeps the atomic polarization maximized during the atom-cavity interaction time, resulting in enhanced photoemission
Summary
Hyperradiance in which radiation rate exceeds that of superradiance has been theoretically investigated in various coherently-coupled emitter-field systems. In recent years, several authors pointed out that under proper conditions the emission rate can exceed that of superradiance Emission in such circumstances is called hyperradiance and it has been theoretically studied in various physical systems such as coupled linear Josephson junctions[18,19,20,21] and atom-cavity systems[22,23,24]. With numerical simulations and analytic calculations, we demonstrate that significant hyperradiance can occur when a pump field intersecting the cavity mode is introduced with opposite phase to the atom-cavity coupling Under this condition, the pump Rabi frequency counteracts the atom-cavity coupling and keeps the atomic polarization maximized during the atom-cavity interaction time, resulting in enhanced photoemission. We confirm that the present scheme is robust to random fluctuations such as random arrival times of atoms and Scientific Reports | (2021) 11:11256
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