487 citations · 6.8k across the 143 of their papers we have counts for
141 papers
Structure and Dynamics of Bose Polarons across the Mott-Insulator to Superfluid Transition
Ragheed Alhyder, Alessio Recati, Georg M. Bruun
A mobile impurity particle immersed in a quantum degenerate gas leads to the formation of a quasiparticle, which can serve as a sensor for its environment. Here, we develop a unifi…
Fermionic pairs, from the surface to the bulk
Sandra Brandstetter, Carl Heintze, Fabian Brauneis +4
Fermion pairing underlies collective quantum phenomena across widely different forms of matter. In extended systems such as ultracold Fermi gases, pairing is commonly understood th…
The moving Fermi polaron
Johanna Hennebichler, Ruben Erlenstedt, Erich Dobler +5
The Fermi polaron, formed by an impurity interacting with a surrounding Fermi sea, exemplifies the canonical quasiparticle concept as a cornerstone in our description of quantum ma…
Scale invariance of the polaron energy at the Mott-superfluid critical point
Matija Čufar, Ragheed Alhyder, C. J. Bradly +4
Continuous quantum phase transitions are characterized by an order parameter and correlation functions that are often challenging to access experimentally or in direct numerical si…
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…
Hole and spin dynamics in an anti-ferromagnet close to half filling
Magnus Callsen, Jens H. Nyhegn, Kristian Knakkergaard Nielsen +1
The interplay between charge and spin dynamics is at the heart of strongly correlated materials. Inspired by recent quantum simulation experiments, we develop a conserving diagramm…