Experimental observation of one-dimensional superradiance lattices in ultracold atoms

TL;DR

This paper reports the experimental observation of one-dimensional superradiance lattices in ultracold atoms, demonstrating controllable directional emission and providing a platform for studying collective effects in quantum systems.

Contribution

First experimental realization of 1D superradiance lattices in ultracold atoms with controllable emission spectra and band structure.

Findings

Directional superradiant emission observed

Emission spectra depend on laser parameters

Platform for studying collective Lamb shift

Abstract

We measure the superradiant emission in a one-dimensional (1D) superradiance lattice (SL) in ultracold atoms. Resonantly excited to a superradiant state, the atoms are further coupled to other collectively excited states, which form a 1D SL. The directional emission of one of the superradiant excited states in the 1D SL is measured. The emission spectra depend on the band structure, which can be controlled by the frequency and intensity of the coupling laser fields. This work provides a platform for investigating the collective Lamb shift of resonantly excited superradiant states in Bose-Einstein condensates and paves the way for realizing higher dimensional superradiance lattices.