Two-Step Production of Resonant Bose-Einstein Condensates

Abstract

Producing a substantial and stable resonant Bose-Einstein condensate (BEC) has proven to be a challenging experimental task due to heating and three-body losses that may occur even before the gas comes to thermal equilibrium. In this paper, by considering only two-body correlations, we note that a sudden quench from small to large scattering lengths may not be the best way to prepare a resonant BEC. As an alternative, we propose a two-step scheme that involves an intermediate scattering length, between $0$ and $\infty$, which serves to maximize the transfer probability of $N$ bosons of mass $m$ in a harmonic trap with frequency $\omega$. We find that the intermediate scattering length should be $a\approx 3.16N^{-2/3}\sqrt{\hslash /(m\omega )}$ to produce an optimum transition probability of $1.03N^{-1/6}$.

References in corpus (27)

• Universality in Few-body Systems with Large Scattering Length
• The unitary gas in an isotropic harmonic trap: symmetry properties and applications
• Universal dynamics of a degenerate unitary Bose gas
• Three-body recombination in Bose gases with large scattering length
• Universal Prethermal Dynamics of Bose Gases Quenched to Unitarity
• Cold Bose gases with large scattering lengths
• Two and Three-body Contacts in the Unitary Bose Gas
• Stability of a unitary Bose gas
• Quenching to unitarity: Quantum dynamics in a 3D Bose gas
• Two-body and Three-body Contacts for Identical Bosons near Unitarity
• Universal Scaling Laws in the Dynamics of a Homogeneous Unitary Bose Gas
• Observation of Efimov molecules created from a resonantly interacting Bose gas
• Potential Harmonics Expansion Method for Trapped Interacting Bosons : Inclusion of Two-Body Correlation
• Quench dynamics of a strongly interacting resonant Bose gas
• Ground State Properties of Cold Bosonic Atoms At Large Scattering Lengths
• Ground state of a resonantly interacting Bose gas
• Efimov Physics in Quenched Unitary Bose Gases
• The Universality and stability for a dilute Bose gas with a Feshbach resonance
• Monte Carlo Simulations of the Unitary Bose Gas
• Nature of 3D Bose Gases near Resonance
• Two-body correlations in N-body boson systems
• Bose Gases Near Resonance: renormalized interactions in a condensate
• Correlated N-boson systems for arbitrary scattering length
• Renormalized mean-field theory for a two-component Fermi gas with s-wave interactions
• Structure of boson systems beyond the mean-field
• Renormalized contact interaction in degenerate unitary Bose gases
• Hyperspherical-LOCV Approximation to Resonant BEC

Cited by in corpus (1)

• Bunching, clustering, and the buildup of few-body correlations in a quenched unitary Bose gas