Observation of a Superradiant Mott Insulator in the Dicke-Hubbard Model.
- J. Klinder, H. Keßler, M. Bakhtiari, M. Thorwart, A. Hemmerich
- PhysicsPhysical Review Letters
- 3 November 2015
By implementing an optical lattice inside of a high-finesse optical cavity, both models are merged such that an extended Hubbard model with cavity-mediated infinite range interactions arises.
Dynamical phase transition in the open Dicke model
- J. Klinder, H. Keßler, M. Wolke, L. Mathey, A. Hemmerich
- PhysicsProceedings of the National Academy of Sciences
- 5 September 2014
In well-controlled sweeps across the Hepp–Lieb–Dicke phase transition, hysteretic dynamics showing power-law scaling with respect to the transition time suggests an interpretation in terms of a Kibble–Zurek mechanism, and indicates the possibility of universal behavior in the presence of dissipation.
Steering matter wave superradiance with an ultranarrow-band optical cavity.
The instability boundary for the onset of matter wave superradiance is recorded and its main features are explained by a mean field model.
Optomechanical atom-cavity interaction in the sub-recoil regime
We study the optomechanical interaction of a Bose–Einstein condensate with a single longitudinal mode of an ultra-high finesse standing wave optical resonator. As a unique feature the resonator…
In situ observation of optomechanical Bloch oscillations in an optical cavity
It is shown experimentally that a Bose–Einstein condensate inside an optical cavity, operating in the regime of strong cooperative coupling, responds to an external force by an optomechanical Bloch…
Bloch oscillations of a Bose-Einstein condensate in a cavity-induced optical lattice
This article complements previous work on the nondestructive observation of Bloch oscillations of a Bose-Einstein condensate in an optical lattice formed inside a high-finesse optical cavity [H.…
Observation of a Dissipative Time Crystal.
- H. Keßler, Phatthamon Kongkhambut, Christoph Georges, L. Mathey, Jayson G. Cosme, A. Hemmerich
- PhysicsPhysical Review Letters
- 16 December 2020
The first experimental realization of a time crystal stabilized by dissipation is presented, demonstrating the robustness of this dynamical phase against system parameter changes and temporal perturbations of the driving.
From a continuous to a discrete time crystal in a dissipative atom-cavity system
- H. Keßler, Jayson G. Cosme, Christoph Georges, L. Mathey, A. Hemmerich
- PhysicsNew Journal of Physics
- 30 April 2020
We propose the dynamical stabilization of a nonequilibrium order in a driven dissipative system comprised an atomic Bose–Einstein condensate inside a high finesse optical cavity, pumped with an…
Cavity Cooling Below the Recoil Limit
An atom-cavity system is reported, combining a Purcell factor above 40 with a cavity bandwidth below the recoil frequency associated with the kinetic energy transfer in a single photon scattering event, which lets us access a yet-unexplored regime of atom- cavity interactions, in which the atomic motion can be manipulated by targeted dissipation with sub-recoil resolution.
Emergent limit cycles and time crystal dynamics in an atom-cavity system
- H. Keßler, Jayson G. Cosme, M. Hemmerling, L. Mathey, A. Hemmerich
- PhysicsPhysical Review A
- 7 May 2019
We propose an experimental realization of a time crystal using an atomic Bose-Einstein condensate in a high finesse optical cavity pumped with laser light detuned to the blue side of the relevant…