Quantum correlations in dipolar droplets: Time-dependent Hartree-Fock-Bogoliubov theory
@article{Boudjema2020QuantumCI, title={Quantum correlations in dipolar droplets: Time-dependent Hartree-Fock-Bogoliubov theory}, author={Abdel{\^a}ali Boudjem{\^a}a and Nadia Guebli}, journal={Physical Review A}, year={2020}, volume={102} }
We investigate the effects of quantum correlations on dipolar quantum droplets. To this end,we derive self-consistent time-dependent Hartree-Fock-Bogoliubov equations that fairly describe the dynamics of the order parameter, the normal, and anomalous quantum correlations of the droplet. We analyze the density profiles, the critical number of particles, the condensate depletion, and the pair correlation function. Our predictions are compared with very recent experimental and Quantum Monte-Carlo…
4 Citations
Novel soliton in dipolar BEC caused by the quantum fluctuations
- PhysicsThe European Physical Journal D
- 2021
Solitons in the extended hydrodynamic model of the dipolar Bose–Einstein condensates with the quantum fluctuations are considered. This model includes the continuity equation for the scalar field of…
Many-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures
- PhysicsScientific Reports
- 2021
At finite temperature, it is shown that the droplet emerges at temperatures well below the Berezinskii–Kosterlitz–Thouless transition temperature, and the critical temperature strongly depends on the interspecies interactions.
Characterization of the energy level-structure of a trapped dipolar Bose gas via mean-field parametric resonances
- PhysicsPhysica Scripta
- 2021
Analyzing the energy levels of a trapped Bose–Einstein condensate (BEC) can be difficult when dipole-dipole interactions (DDIs) are present. To address this issue, this study focuses on the…
Self-bound droplets in quasi-two-dimensional dipolar condensates
- Education, Physics
- 2021
Yuqi Wang, 2 Tao Shi, 3, ∗ and Su Yi 2, 3, 4, † CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China School of Physical…
86 References
Dilute dipolar quantum droplets beyond the extended Gross-Pitaevskii equation
- PhysicsPhysical Review Research
- 2019
Dipolar quantum droplets are exotic quantum objects that are self-bound due to the subtle balance of attraction, repulsion and quantum correlations. Here we present a systematic study of the critical…
Two-dimensional quantum droplets in dipolar Bose gases
- PhysicsNew Journal of Physics
- 2019
We calculate analytically the quantum and thermal fluctuations corrections of a dilute quasi-two-dimensional Bose-condensed dipolar gas. We show that these fluctuations may change their character…
Fluctuations and quantum self-bound droplets in a dipolar Bose-Bose mixture
- PhysicsPhysical Review A
- 2018
We systematically investigate the properties of three-dimensional dipolar binary Bose mixture at low temperatures. A set of coupled self-consistent equations of motion are derived for the two…
Quantum fluctuations in dipolar Bose gases
- Physics
- 2011
We investigate the influence of quantum fluctuations upon dipolar Bose gases by means of the Bogoliubov-de Gennes theory. Thereby, we make use of the local density approximation to evaluate the…
Droplets of Trapped Quantum Dipolar Bosons.
- PhysicsPhysical review letters
- 2016
By adding a repulsive two-body potential, this work finds a narrow window of interaction parameters leading to stable ground-state configurations of droplets in a crystalline arrangement without resorting to additional stabilizing mechanisms or specific three-body forces.
Observation of Quantum Droplets in a Strongly Dipolar Bose Gas.
- PhysicsPhysical review letters
- 2016
By systematic measurements on individual droplets it is demonstrated quantitatively that quantum fluctuations mechanically stabilize them against the mean-field collapse, and the interference of several droplets indicating that this stable many-body state is phase coherent.
Collective Excitations of Self-Bound Droplets of a Dipolar Quantum Fluid.
- PhysicsPhysical review letters
- 2017
The filament-shaped droplets act as a quasi-one-dimensional waveguide along which low-angular-momentum phonons propagate and the crossover from a trap-bound condensate to a self-bound droplet is quantified.
Theory of excitations of dipolar Bose–Einstein condensate at finite temperature
- Physics
- 2013
We present a systematic study of dilute three-dimensional dipolar Bose gas employing a finite temperature perturbation theory (beyond the mean field). We analyze in particular the behavior of the…
Temperature-dependent density profiles of dipolar droplets
- PhysicsPhysical Review A
- 2019
Recently, trapped dipolar gases were observed to form high density droplets in a regime where mean field theory predicts collapse. These droplets present a novel form of equilibrium where quantum…