464 citations · 3.9k across the 57 of their papers we have counts for
24 papers · 1 filter
Observation of low-lying impurity states in Bose-Einstein condensates
A. M. Morgen, S. S. Balling, M. T. Strøe +6
Impurities embedded in a Bose-Einstein Condensate (BEC) of 39K atoms are investigated with a pump-probe ejection spectroscopy sequence. The spectroscopic signal exhibits a strong f…
Scissors modes in generalized Gross-Pitaevskii equations
Oleksandr V. Marchukov, Neelam Shukla, Bastien Humbert +3
We investigate scissors modes in nonlinear systems with arbitrary power-law dependence of the nonlinear term. Through analytical derivation, we establish a general expression demon…
Quantum beat spectroscopy of repulsive Bose polarons
A. M. Morgen, S. S. Balling, K. Knakkergaard Nielsen +3
The physics of impurities in a bosonic quantum environment is a paradigmatic and challenging many-body problem that remains to be understood in its full complexity. Here, this prob…
Life and death of the Bose polaron
Magnus G. Skou, Kristian Knakkergaard Nielsen, Thomas G. Skov +6
Spectroscopic and interferometric measurements complement each other in extracting the fundamental properties of quantum many-body systems. While spectroscopy provides precise meas…
Mediated interactions between ions in quantum degenerate gases
Shanshan Ding, Michael Drewsen, Jan J. Arlt +1
We explore the interaction between two trapped ions mediated by a surrounding quantum degenerate Bose or Fermi gas. Using perturbation theory valid for weak atom-ion interaction, w…
Remote multi-user control of the production of Bose-Einstein condensates for research and education
J S Laustsen, R Heck, O Elíasson +3
Remote control of experimental systems allows for improved collaboration between research groups as well as unique remote educational opportunities accessible by students and citiz…