Vibrational spectroscopy of polar molecules with superradiance

TL;DR

This paper explores how superradiance affects vibrational transitions in polar molecules, showing that cooperative effects can significantly accelerate decay processes in ultracold molecular systems.

Contribution

It demonstrates the importance of superradiant effects in vibrational and rotational states of polar molecules, supported by theoretical calculations matching experimental data.

Findings

Superradiance accelerates vibrational decay in polar molecules.

Dipole-dipole interactions induce inter-particle coherence.

Theoretical results align with recent experimental observations.

Abstract

We investigate cooperative phenomena and superradiance for vibrational transitions in polar molecule spectroscopy when a high optical-depth (OD) sample is studied. Such cooperativity comes from the build-up of inter-particle coherence through dipole-dipole interactions and leads to the speed-up of decay process. We compare our calculation to recent work [Deiglmayr et al., Eur. Phys. J. D 65, 99 (2011)] and find very good agreement, suggesting that superradiant effects need to be included in a wide variety of ultracold molecule setups including vibrational and rotational states.