Ideal n-body correlations with massive particles

Abstract

In 1963 Glauber introduced the modern theory of quantum coherence, which extended the concept of first-order (one-body) correlations, describing phase coherence of classical waves, to include higher-order (n-body) quantum correlations characterizing the interference of multiple particles. Whereas the quantum coherence of photons is a mature cornerstone of quantum optics, the quantum coherence properties of massive particles remain largely unexplored. To investigate these properties, here we use a uniquely correlated source of atoms that allows us to observe n-body correlations up to the sixth-order at the ideal theoretical limit (n!). Our measurements constitute a direct demonstration of the validity of one of the most widely used theorems in quantum many-body theory--Wisck's theorem--for a thermal ensemble of massive particles. Measurements involving n-body correlations may play an important role in the understanding of thermalization of isolated quantum systems and the thermodynamics of exotic many-body systems, such as Efimov trimers.

10 pages, 3 figures, plus Supplementary Information

References in corpus (3)

• Camparison of the Hanbury Brown-Twiss effect for bosons and fermions
• Characterization of the non-classical nature of conditionally prepared single photons
• Two-body momentum correlations in a weakly interacting one-dimensional Bose gas

Cited by in corpus (8)

• Ghost Imaging with Atoms
• Proposal for a motional-state Bell inequality test with ultracold atoms
• Fast production of Bose-Einstein condensates of metastable Helium
• Exact results for polaron and molecule in one-dimensional spin-1/2 Fermi gas
• Temporal and spatio-temporal correlation functions for trapped Bose gases
• Quantum Correlations of Ideal Bose and Fermi Gases in the Canonical Ensemble
• Interferometry with Atoms
• Effect of Pauli blocking on coherent states of composite bosons