Connected correlations in cold atom experiments

• URL: http://arxiv.org/abs/2511.00448v1
• Date: Sat, 01 Nov 2025 08:29:56 GMT
• Title: Connected correlations in cold atom experiments
• Authors: Thomas Chalopin, Igor Ferrier-Barbut, Thierry Lahaye, Antoine Browaeys, David Clément,
• Abstract summary: This article illustrates the significance of connected correlations in characterizing ensembles of interacting quantum particles.<n>Non-zero connected correlations of order n > 2 unambiguously identify non-Gaussian quantum states.<n>The ability to identify such multi-particle clusters offers a an interesting perspective on strongly correlated quantum states of matter at the microscopic scale.
• Score: 0.054370502121390864
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The recent development of single-atom-resolved probes has made full counting statistics measurements accessible in quantum gas experiments. This capability provides access to high-order moments of physical observables, from which cumulants, or equivalently connected correlations, can be precisely determined. Through a selection of recent cold atom experiments, this article illustrates the significance of connected correlations in characterizing ensembles of interacting quantum particles. First, non-zero connected correlations of order n > 2 unambiguously identify non-Gaussian quantum states. Second, connected correlations of order n identify clusters made of n elements whose statistical properties are irreducible to combinations of smaller clusters. The ability to identify such multi-particle clusters offers a an interesting perspective on strongly correlated quantum states of matter at the microscopic scale.

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