Superradiance during Bragg diffraction with lattice structure control

Richard H. Parker, C. X. Yu, Weicheng Zhong +2 more

P. V. Zinov’ev, Nataliya B. Silaeva, Yu. E. Sheǐbut

Bo Lü, Thibault Vogt, Xinxing Liu +3 more

Correlations of a Bose gas released from an optical lattice are measured using superradiant scattering. Conditions are chosen so that, after initial incident light pumping at the Bragg angle for diffraction, superradiant scattering into the Bragg diffracted mode is preponderant due to matter-wave amplification and mode competition. A temporal analysis of the superradiant scattering gain reveals periodical oscillations and damping due to the initial lack of coherence between lattice sites. Such damping is used for characterizing first-order spatial correlations in our system with a precision of one lattice period.

Thibault Vogt, Bo Lu, Xinxing Liu +3 more

Superradiant Rayleigh scattering in a Bose gas released from an optical lattice is analyzed with incident light pumping at the Bragg angle for resonant light diffraction. We show that competition between superradiance scattering into the Bragg mode and into end-fire modes clearly leads to suppression of the latter at even relatively low lattice depths. A quantum light-matter interaction model is proposed for qualitatively explaining this result.

Igor Ferrier-Barbut

Vincenzo Gino Benza, E. Montaldi, Mikael Ciftan