Light-induced coherence in an atom-cavity systemChristoph Georges, Jayson G. Cosme, Ludwig Mathey, Andreas Hemmerich

20 November 2018

We demonstrate light-induced formation of coherence in a cold atomic gas system that utilizes the suppression of a competing density wave (DW) order. The condensed atoms are placed in an optical cavity and pumped by an external optical standing wave, which induces a long-range interaction, mediated by photon scattering, and DW order above a critical pump strength. We show that light induced modulation of the pump wave can suppress this DW order and restore coherence. This establishes a foundational principle of dynamical control of competing orders analogous to a hypothesized mechanism for light induced superconductivity in high-Tc cuprates.

Phys. Rev. Lett. 121, 220405 (2018)

arXiv:1807.02577

News coverage:

CUI: Light-induced increase of transition temperature in superconductors

Physics Department: Lichtinduzierte Erhöhung der Sprungtemperatur in Supraleitern

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