Dilute Fluid Governed by Quantum Fluctuations
arXiv:1810.11339 · doi:10.1103/PhysRevLett.121.173403
Abstract
Understanding the effects of interactions in complex quantum systems beyond the mean-field paradigm constitutes a fundamental problem in physics. Here, we show how the atom numbers and interactions in a Bose-Bose mixture can be tuned to cancel mean-field interactions completely. The resulting system is entirely governed by quantum fluctuations -- specifically the Lee-Huang-Yang correlations. We derive an effective one-component Gross-Pitaevskii equation for this system, which is shown to be very accurate by comparison with a full two-component description. This allows us to show how the Lee-Huang-Yang correlation energy can be accurately measured using two powerful probes of atomic gases: collective excitations and radio-frequency spectroscopy. Importantly, the behavior of the system is robust against deviations from the atom number and interaction criteria for canceling the mean-field interactions. This shows that it is feasible to realize a setting where quantum fluctuations are not masked by mean-field forces, allowing investigations of the Lee-Huang-Yang correction at unprecedented precision.
References in corpus (21)
- Theory of Bose-Einstein condensation in trapped gases
- Quantum Mechanical Stabilization of a Collapsing Bose-Bose Mixture
- Quantum liquid droplets in a mixture of Bose-Einstein condensates
- Observation of quantum droplets in a strongly dipolar Bose gas
- Observing the Rosensweig instability of a quantum ferrofluid
- Self-bound quantum droplets in atomic mixtures
- Self-bound droplets of a dilute magnetic quantum liquid
- Quantum-fluctuation-driven crossover from a dilute Bose-Einstein condensate to a macro-droplet in a dipolar quantum fluid
- Observation of Attractive and Repulsive Polarons in a Bose-Einstein Condensate
- Bright soliton to quantum droplet transition in a mixture of Bose-Einstein condensates
- The Equation of State of a Low-Temperature Fermi Gas with Tunable Interactions
- Contact Measurements on Atomic BEC
- Precision Measurements of Collective Oscillations in the BEC-BCS Crossover
- Effect of cold collisions on spin coherence and resonance shifts in a magnetically trapped ultra-cold gas
- Bragg spectroscopy of a strongly interacting 85Rb Bose-Einstein condensate
- Quasiparticle properties of a mobile impurity in a Bose-Einstein condensate
- Dynamics and Thermodynamics of the Low-Temperature Strongly Interacting Bose Gas
- Realization of a strongly interacting Bose-Fermi mixture from a two-component Fermi gas
- Collective oscillations of a Fermi gas in the unitarity limit: Temperature effects and the role of pair correlations
- Quantum Corrections to the Ground State of a Trapped Bose-Einstein Condensate
- Effective interactions in a quantum Bose-Bose mixture
Cited by in corpus (45)
- Collisions of self-bound quantum droplets
- Modulational instability, inter-component asymmetry and formation of quantum droplets in one-dimensional binary Bose gases
- Lee-Huang-Yang effects in the ultracold mixture of Na and Rb with attractive interspecies interactions
- Observation of a Lee-Huang-Yang Fluid
- Non-degenerate Bound State Solitons in Multi-component Bose-Einstein Condensates
- Consistent theory of self-bound quantum droplets with bosonic pairing
- Microscopic pairing theory of a binary Bose mixture with interspecies attractions: bosonic BEC-BCS crossover and ultradilute low-dimensional quantum droplets
- Formation and quench of homonuclear and heteronuclear quantum droplets in one dimension
- Quantum solitons in spin-orbit-coupled Bose-Bose mixtures
- Thermal instability, evaporation and thermodynamics of one-dimensional liquids in weakly-interacting Bose-Bose mixtures
- Strongly anisotropic vortices in dipolar quantum droplets
- Finite-range effects in ultradilute quantum drops
- Suppression of the quasi-two-dimensional quantum collapse in the attraction field by the Lee-Huang-Yang effect
- Tunable three-body interactions in driven two-component Bose-Einstein condensates
- Spinor-Induced Instability of Kinks, Holes and Quantum Droplets
- Effective expression of the Lee-Huang-Yang energy functional for heteronuclear mixtures
- Breathing mode in two-dimensional binary self-bound Bose gas droplets
- Dark quantum droplets and solitary waves in beyond-mean-field Bose-Einstein condensate mixtures
- Spectrum and quench-induced dynamics of spin-orbit coupled quantum droplets
- Magnetic stripe soliton and localized stripe wave in spin-1 Bose-Einstein condensates
- Ground-state Properties and Bogoliubov Modes of a Harmonically Trapped One-Dimensional Quantum Droplet
- Quantum Criticality of Liquid-Gas Transition in a Binary Bose Mixture
- Singular mean-field states: A brief review of recent results
- Supersolid Stacks in Antidipolar Bose-Einstein Condensates
- Towards a QMC-based density functional including finite-range effects: excitation modes of a K quantum droplet
- Quantum droplets in three-dimensional Bose-Einstein condensates
- Collective excitations in two-dimensional harmonically trapped quantum droplets
- On Solving Cubic-Quartic Nonlinear Schrödinger Equation in a Cnoidal Trap
- Effects of quantum fluctuations on macroscopic quantum tunneling and self-trapping of BEC in a double well trap
- Classical linear chain behavior from dipolar droplets to supersolids
- The Effective Single-mode model of a Binary Boson Mixture in the Quantum Droplet Region
- Modulational instability and discrete quantum droplets in a deep quasi-one-dimensional optical lattice
- Suppression of Bogoliubov momentum pairing and emergence of non-Gaussian correlations in ultracold interacting Bose gases
- Effect of beyond mean-field interaction on the structure and dynamics of the one-dimensional quantum droplet
- One-dimensional purely Lee-Huang-Yang fluids dominated by quantum fluctuations in two-component Bose-Einstein condensates
- Large- expansion for condensation and stability of Bose-Bose mixtures at finite temperatures
- Singular and regular vortices on top of a background pulled to the center
- Quantum corrections to a spin-orbit coupled Bose-Einstein Condensate
- Magnetoroton in a two-dimensional Bose-Bose mixture
- A new form of liquid matter: quantum droplets
- Quantum-droplet interferometry
- Supersonic Flow Past an Obstacle in a Quasi-Two-Dimensional Lee-Huang-Yang Quantum Fluid
- Modulational instability and quantum droplets in a two-dimensional Bose-Einstein condensate
- Ab-initio Quantum Monte Carlo study of ultracold atomic mixtures
- Self-evaporation dynamics of quantum droplets in a 41K-87Rb mixture