Quenched dynamics of the momentum distribution of the unitary Bose gas

Abstract

We study the quenched dynamics of the momentum distribution of a unitary Bose gas under isotropic harmonic confinement within a time-dependent density functional approach based on our recently calculated Monte Carlo (MC) bulk equation of state. In our calculations the inter-atomic s-wave scattering length of the trapped bosons is suddenly increased to a very large value and the real-time evolution of the system is studied. Prompted by the very recent experimental data of ${}^{85}$Rb atoms at unitarity [Nature Phys. 10, 116 (2014)] we focus on the momentum distribution as a function of time. Our results suggest that at low momenta, a quasi-stationary momentum distribution is reached after a long transient, contrary to what found experimentally for large momenta which equilibrate on a time scale shorter than the one for three body losses.

8 pages, 4 figures, submitted to a Special Issue of Few-Body Systems "Systems on the verge of the stability"

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Cited by in corpus (9)

• Universal few-body physics and cluster formation
• Strongly correlated Bose gases
• Universal Dynamics of a Degenerate Bose Gas Quenched to Unitarity
• Early-time dynamics of Bose gases quenched into the strongly interacting regime
• High Temperature Virial Expansion to Universal Quench Dynamics
• Pair formation in quenched unitary Bose gases
• Harmonically Trapped Four-Boson System
• Maximum Energy Growth Rate in Dilute Quantum Gases
• Evolution of the unitary Bose gas for broad to narrow Feshbach resonances