Connecting few-body inelastic decay to many-body correlations: a weakly coupled impurity in a resonant Fermi gas

Abstract

We study three-body recombination in an ultracold Bose-Fermi mixture. We first show theoretically that, for weak inter-species coupling, the loss rate is proportional to Tan's contact. Second, using a 7 Li/ 6 Li mixture we probe the recombination rate in both the thermal and dual superfluid regimes. We find excellent agreement with our model in the BEC-BCS crossover. At unitarity where the fermion-fermion scattering length diverges, we show that the loss rate is proportional the 4/3 power of the fermionic density. Our results demonstrate that impurity-induced losses can be used as a quantitative probe of many-body correlations.

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Cited by in corpus (28)

• Spectral response and contact of the unitary Fermi gas
• Few-body physics in resonantly interacting ultracold quantum gases
• Universal Scaling Laws in the Dynamics of a Homogeneous Unitary Bose Gas
• Contact and sum-rules in a near-uniform Fermi gas at unitarity
• Quantum turbulence in quantum gases
• Tan's Contact for Trapped Lieb-Liniger Bosons at Finite Temperature
• Contact and Momentum Distribution of the Unitary Fermi Gas
• Efimov Physics in Quenched Unitary Bose Gases
• Evidence for Bosonization in a three-dimensional gas of SU($N$) fermions
• Universal pair-polaritons in a strongly interacting Fermi gas
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• Thermally-robust spin correlations between two 85Rb atoms in an optical microtrap
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• Finite temperature contact for SU(2) fermions trapped in a 1D harmonic confinement
• Universal quantum dynamics of Bose polarons
• Probing Goldstino excitation through the tunneling transport in a Bose-Fermi mixture with explicitly broken supersymmetry
• Estimated values of the kinetic energy for liquid ${}^3$He
• Three-body contact for fermions. I. General relations
• Temperature dependence of $p$-wave contacts in a harmonically trapped Fermi gas
• Hybrid-pair superfluidity in a strongly driven Fermi gas
• Heuristic machinery for thermodynamic studies of SU(N) fermions with neural networks