Superradiant Cooling, Trapping, and Lasing of Dipole-Interacting Clock Atoms

Abstract

A cold atomic gas with an inverted population on a transition coupled to a field mode of an optical resonator constitutes a generic model of a laser. For quasi-continuous operation, external pumping, trapping and cooling of the atoms is required to confine them in order to achieve enough gain inside the resonator. As inverted atoms are high-field seekers in blue detuned light fields, tuning the cavity mode to the blue side of the atomic gain transition allows for combining lasing with stimulated cavity cooling and dipole trapping of the atoms at the antinodes of the laser field. We study such a configuration using a semiclassical description of particle motion along the cavity axis. In extension of earlier work we include free space atomic and cavity decay as well as atomic dipole-dipole interactions and their corresponding forces. We show that for a proper choice of parameters even in the bad cavity limit the atoms can create a sufficiently strong field inside the resonator such that they are trapped and cooled via the superradiant lasing action with less than one photon on average inside the cavity.

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Cited by in corpus (13)

• Cavity QED with Quantum Gases: New Paradigms in Many-Body Physics
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• A Nanoscale Coherent Light Source
• Subradiant-to-Subradiant Phase Transition in the Bad Cavity Laser
• Superradiant lasing in inhomogeneously broadened ensembles with spatially varying coupling
• Superradiant optomechanical phases of cold atomic gases in optical resonators
• Continuous multi-step pumping of the optical clock transition in alkaline-earth atoms with minimal perturbation
• Prospects of a superradiant laser based on a thermal or guided beam of Sr-88
• Observation of Light-Induced Dipole-Dipole Forces in Ultracold Atomic Gases
• Continuous narrowband lasing with coherently driven V-level atoms
• Collective emission of an atomic beam into an off-resonant cavity mode
• Mean-field Floquet theory for a three-level cold-atom laser
• Photoionization cross sections of ultracold ${}^{88}$Sr in ${}^1$P${}_1$ and ${}^3$S${}_1$ states at 390 nm and the resulting blue-detuned magic wavelength optical lattice clock constraints