Dipolar physics: a review of experiments with magnetic quantum gases

L Chomaz, I Ferrier-Barbut, F Ferlaino… - Reports on Progress …, 2022 - iopscience.iop.org
Since the achievement of quantum degeneracy in gases of chromium atoms in 2004, the
experimental investigation of ultracold gases made of highly magnetic atoms has …

New states of matter with fine-tuned interactions: quantum droplets and dipolar supersolids

F Böttcher, JN Schmidt, J Hertkorn… - Reports on Progress …, 2020 - iopscience.iop.org
Quantum fluctuations can stabilize Bose–Einstein condensates (BEC) against the mean-
field collapse. Stabilization of the condensate has been observed in quantum degenerate …

Observation of roton mode population in a dipolar quantum gas

L Chomaz, RMW van Bijnen, D Petter, G Faraoni… - Nature physics, 2018 - nature.com
The concept of a roton, a special kind of elementary excitation forming a minimum of energy
at finite momentum, has been essential for the understanding of the properties of superfluid …

Fate of the amplitude mode in a trapped dipolar supersolid

J Hertkorn, F Böttcher, M Guo, JN Schmidt, T Langen… - Physical Review Letters, 2019 - APS
We theoretically investigate the spectrum of elementary excitations of a trapped dipolar
quantum gas across the BEC-supersolid phase transition. Our calculations reveal the …

Probing the scale invariance of the inflationary power spectrum in expanding quasi-two-dimensional dipolar condensates

SY Chä, UR Fischer - Physical review letters, 2017 - APS
We consider an analogue de Sitter cosmos in an expanding quasi-two-dimensional Bose-
Einstein condensate with dominant dipole-dipole interactions between the atoms or …

Dynamical excitation of maxon and roton modes in a Rydberg-Dressed Bose-Einstein Condensate

G McCormack, R Nath, W Li - Physical Review A, 2020 - APS
We investigate the dynamics of a three-dimensional Bose-Einstein condensate of ultracold
atomic gases with a soft-core-shaped long-range interaction, which is induced by laser …

Roton entanglement in quenched dipolar Bose-Einstein condensates

Z Tian, SY Chä, UR Fischer - Physical Review A, 2018 - APS
We study quasi-two-dimensional dipolar Bose-Einstein condensates, in which the
Bogoliubov excitation spectrum displays, at sufficiently large gas density, a deep roton …

Dynamic freezing and defect suppression in the tilted one-dimensional Bose-Hubbard model

U Divakaran, K Sengupta - Physical Review B, 2014 - APS
We study the dynamics of a tilted one-dimensional Bose-Hubbard model for two distinct
protocols using numerical diagonalization for a finite sized system (N≤ 18). The first …

Interaction quenches in Bose gases studied with a time-dependent hypernetted-chain Euler-Lagrange method

M Gartner, D Miesbauer, M Kobler, J Freund… - arxiv preprint arxiv …, 2022 - arxiv.org
We present a new variational method to study the dynamics of a closed bosonic many-body
system, the time-dependent hypernetted-chain Euler-Lagrange method, tHNC. Based on the …

Phonon and maxon instability in Bose–Einstein condensates with parity-time symmetric spin–orbit coupling

J Qin, L Zhou, G Dong - New Journal of Physics, 2023 - iopscience.iop.org
Parity-time (PT) symmetry has drawn great research interest in non-Hermitian physics.
Recently, there is an emerging model of PT-symmetric spinorbit coupling (SOC) which could …