Pump-probe spectroscopy of two-body correlations in ultracold gases

TL;DR

This paper proposes a pump-probe spectroscopy method to investigate pair correlations in ultracold gases, enabling the spectral analysis of pair dynamics and correlations through transient signals.

Contribution

It introduces a novel pump-probe technique specifically designed to measure and analyze pair correlations in ultracold atomic gases.

Findings

Demonstrates how a short laser pulse creates a localized 'hole' in pair density.

Shows that the transient signal reveals spectral information about pair correlations.

Provides a method to map out pair correlation functions in ultracold gases.

Abstract

We suggest pump-probe spectroscopy to study pair correlations that determine the many-body dynamics in weakly interacting, dilute ultracold gases. A suitably chosen, short laser pulse depletes the pair density locally, creating a 'hole' in the electronic ground state. The dynamics of this non-stationary pair density is monitored by a time-delayed probe pulse. The resulting transient signal allows to spectrally decompose the 'hole' and to map out the pair correlation functions.