Collective atom-cavity coupling and non-linear dynamics with atoms with multilevel ground states

Abstract

We investigate experimentally and theoretically the collective coupling between atoms with multilevel ground state manifolds and an optical cavity mode. In our setup the cavity field optically pumps populations among the ground states. The ensuing dynamics can be conveniently described by means of an effective dynamical atom-cavity coupling strength that depends on the occupation of the individual states and their coupling strengths with the cavity mode. This leads to a dynamical backaction of the atomic populations on the atom-cavity coupling strength which results in a non-exponential relaxation dynamics. We experimentally observe this effect with laser-cooled ${}^{87}$Rb atoms, for which we monitor the collective normal-mode splitting in real time. Our results show that the multilevel structure of electronic ground states can significantly alter the relaxation behavior in atom-cavity settings as compared to ensembles of two-level atoms.

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Cited by in corpus (11)

• Ground state bistability of cold atoms in a cavity
• Non-Gaussian dynamics of quantum fluctuations and mean-field limit in open quantum central spin systems
• Quantum resonant optical bistability with a narrow atomic transition: bistability phase diagram in the bad cavity regime
• Loading atoms from a large magnetic trap to a small intra-cavity dipole trap
• Spin self-organization in an optical cavity facilitated by inhomogeneous broadening
• Genuine Quantum effects in Dicke-type Models at large atom numbers
• Dissipative phase transition: from qubits to qudits
• Deep quantum Monte Carlo approach for polaritonic chemistry
• Quantum bistability in the hyperfine ground state of atoms
• Demonstration of strong coupling of a subradiant atom array to a cavity vacuum
• Superquantization rule for multistability in driven-dissipative quantum systems