Gelhausen, J., Buchhold, M., Rosch, A. and Strack, P. (2016). Quantum-optical magnets with competing short- and long-range interactions: Rydberg-dressed spin lattice in an optical cavity. SciPost Phys., 1 (1). AMSTERDAM: SCIPOST FOUNDATION. ISSN 2542-4653
Full text not available from this repository.Abstract
The fields of quantum simulation with cold atoms [1] and quantum optics [2] are currently being merged. In a set of recent pathbreaking experiments with atoms in optical cavities [3, 4], lattice quantum many-body systems with both, a short-range interaction and a strong interaction potential of infinite range - mediated by a quantized optical light field-were realized. A theoretical modelling of these systems faces considerable complexity at the interface of: (i) spontaneous symmetry-breaking and emergent phases of interacting many-body systems with a large number of atoms N -> infinity, (ii) quantum optics and the dynamics of fluctuating light fields, and (iii) non-equilibrium physics of driven, open quantum systems. Here we propose what is possibly the simplest, quantum-optical magnet with competing short-and long-range interactions, in which all three elements can be analyzed comprehensively: a Rydberg-dressed spin lattice [5] coherently coupled to a single photon mode. Solving a set of coupled even-odd sublattice master equations for atomic spin and photon mean-field amplitudes, we find three key results. (R1): Superradiance and a coherent photon field appears in combination with spontaneously broken magnetic translation symmetry. The latter is induced by the short-range nearest-neighbor interaction from weakly admixed Rydberg levels. (R2): This broken even-odd sublattice symmetry leaves its imprint in the light via a novel peak in the cavity spectrum beyond the conventional polariton modes. (R3): The combined effect of atomic spontaneous emission, drive, and interactions can lead to phases with anomalous photon number oscillations. Extensions of our work include nano-photonic crystals coupled to interacting atoms and multi-mode photon dynamics in Rydberg systems.
| Item Type: | Journal Article | ||||||||||||||||||||
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| URN: | urn:nbn:de:hbz:38-266034 | ||||||||||||||||||||
| DOI: | 10.21468/SciPostPhys.1.1.004 | ||||||||||||||||||||
| Journal or Publication Title: | SciPost Phys. | ||||||||||||||||||||
| Volume: | 1 | ||||||||||||||||||||
| Number: | 1 | ||||||||||||||||||||
| Date: | 2016 | ||||||||||||||||||||
| Publisher: | SCIPOST FOUNDATION | ||||||||||||||||||||
| Place of Publication: | AMSTERDAM | ||||||||||||||||||||
| ISSN: | 2542-4653 | ||||||||||||||||||||
| Language: | English | ||||||||||||||||||||
| Faculty: | Unspecified | ||||||||||||||||||||
| Divisions: | Unspecified | ||||||||||||||||||||
| Subjects: | no entry | ||||||||||||||||||||
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| Refereed: | Yes | ||||||||||||||||||||
| URI: | http://kups.ub.uni-koeln.de/id/eprint/26603 |
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