439 citations · 744 across the 15 of their papers we have counts for
15 papers
Optical spectroscopy of Bose-Einstein condensates at finite temperature
R. M. F. Andersen, L. N. Stokholm, I. Zebergs +4
We report on optical spectroscopic measurements of ultracold and partially condensed 87Rb gases, which show distinct spectral features due to the thermal and the Bose condensed com…
Cloud parameter estimation for interacting BEC after time-of-flight
Rasmus Malthe Fiil Andersen, Stine Frederiksen, Laurits Stokholm +4
Experiments on Bose-Einstein condensates at finite temperature typically extract the system parameters, such as temperature, atom number, and condensed fraction from time-of-flight…
On the fluctuations of the number of atoms in the condensate
Maciej B. Kruk, Piotr Kulik, Malthe F. Andersen +6
Bose-Einstein condensation represents a remarkable phase transition, characterized by the formation of a single quantum subsystem. As a result, the statistical properties of the co…
Polarons in atomic gases and two-dimensional semiconductors
Pietro Massignan, Richard Schmidt, Grigori E. Astrakharchik +4
In this work we provide a comprehensive review of theoretical and experimental studies of the properties of polarons formed by mobile impurities strongly interacting with quantum m…
Atom Number Fluctuations in Bose Gases -- Statistical analysis of parameter estimation
Toke Vibel, Mikkel Berg Christensen, Rasmus Malthe Fiil Andersen +5
The investigation of the fluctuations in interacting quantum systems at finite temperatures showcases the ongoing challenges in understanding complex quantum systems. Recently, ato…
Spatial calibration of high-density absorption imaging
Toke Vibel, Mikkel Berg Christensen, Mick Althoff Kristensen +4
The accurate determination of atom numbers is an ubiquitous problem in the field of ultracold atoms. For modest atom numbers, absolute calibration techniques are available, however…
Observation of Microcanonical Atom Number Fluctuations in a Bose-Einstein Condensate
M. B. Christensen, T. Vibel, A. J. Hilliard +6
Quantum systems are typically characterized by the inherent fluctuation of their physical observables. Despite this fundamental importance, the investigation of the fluctuations in…
Observation of Atom Number Fluctuations in a Bose-Einstein Condensate
M. A. Kristensen, M. B. Christensen, M. Gajdacz +7
Fluctuations are a key property of both classical and quantum systems. While the fluctuations are well understood for many quantum systems at zero temperature, the case of an inter…
Semi-classical Dynamics of Superradiant Rayleigh Scattering in a Bose-Einstein Condensate
J. H. Müller, D. Witthaut, R. le Targat +3
Due to its coherence properties and high optical depth, a Bose-Einstein condensate provides an ideal setting to investigate collective atom-light interactions. Superradiant light s…
A simple laser locking system based on a field-programmable gate array
Nils B. Jørgensen, Danny Birkmose, Kristian Trelborg +5
Frequency stabilization of laser light is crucial in both scientific and industrial applications. Technological developments now allow analog laser stabilization systems to be repl…
Universal three-body physics in ultracold KRb mixtures
L. J. Wacker, N. B. Jørgensen, D. Birkmose +5
Ultracold atomic gases have recently become a driving force in few-body physics due to the observation of the Efimov effect. While initially observed in equal mass systems, one exp…
Interaction-free measurements by quantum Zeno stabilisation of ultracold atoms
J. Peise, B. Lücke, L. Pezzè +6
Quantum mechanics predicts that our physical reality is influenced by events that can potentially happen but factually do not occur. Interaction-free measurements (IFMs) exploit th…
Twin matter waves for interferometry beyond the classical limit
Bernd Lücke, Manuel Scherer, Jens Kruse +10
Interferometers with atomic ensembles constitute an integral part of modern precision metrology. However, these interferometers are fundamentally restricted by the shot noise limit…
Extended coherence time on the clock transition of optically trapped Rubidium
G. Kleine Büning, J. Will, W. Ertmer +6
Optically trapped ensembles are of crucial importance for frequency measurements and quantum memories, but generally suffer from strong dephasing due to inhomogeneous density and l…
Parametric amplification of matter waves in dipolar spinor Bose-Einstein condensates
F. Deuretzbacher, G. Gebreyesus, O. Topic +6
Spin-changing collisions may lead under proper conditions to the parametric amplification of matter waves in spinor Bose-Einstein condensates. Magnetic dipole-dipole interactions,…