Multimode-polariton superradiance via Floquet engineering

We consider an ensemble of ultracold bosonic atoms within a near-planar cavity, driven by a far detuned laser whose phase is modulated at a frequency comparable to the transverse cavity mode spacing. We show that a strong, dispersive atom-photon coupling can be reached for many transverse cavity modes at once. The resulting Floquet polaritons involve a superposition of a set of cavity modes with a density excitation of the atomic cloud. The mutual interactions between these modes lead to distinct avoided crossings between the polaritons. Increasing the laser drive intensity, a low-lying multimode Floquet polariton softens and eventually becomes undamped, corresponding to the transition to a superradiant, self-organized phase. We demonstrate the stability of the stationary state for a broad range of parameters..

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:12

Enthalten in:

SciPost Physics - 12(2022), 3, p 094

Sprache:

Englisch

Beteiligte Personen:

Christian Høj Johansen, Johannes Lang, Andrea Morales, Alexander Baumgärtner, Tobias Donner, Francesco Piazza [VerfasserIn]

Links:

doi.org [kostenfrei]
doaj.org [kostenfrei]
scipost.org [kostenfrei]
Journal toc [kostenfrei]

Themen:

Physics

doi:

10.21468/SciPostPhys.12.3.094

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

DOAJ075359456