Publications (13)
Measurement-enhanced determination of BEC phase transitions
Mark G. Bason, Robert Heck, Mario Napolitano +6
We demonstrate how dispersive atom number measurements during evaporative cooling can be used for enhanced determination of the parameter dependence of the transition to a Bose-Ein…
A hexapole-compensated magneto-optical trap on a mesoscopic atom chip
Stefan Jöllenbeck, Jan Mahnke, Richard Randoll +3
Magneto-optical traps on atom chips are usually restricted to small atomic samples due to a limited capture volume caused primarily by distorted field configurations. Here we prese…
Simulation of XXZ Spin Models using Sideband Transitions in Trapped Bosonic Gases
Anjun Chu, Johannes Will, Jan Arlt +2
We theoretically propose and experimentally demonstrate the use of motional sidebands in a trapped ensemble of Rb atoms to engineer tunable long-range XXZ spin models. We be…
Dynamical control of matter wave splitting using time-dependent optical lattices
Sung Jong Park, Henrik Kjaer Andersen, Sune Mai +2
We report on measurements of splitting Bose-Einstein condensates (BEC) by using a time-dependent optical lattice potential. First, we demonstrate the division of a BEC into a set o…
Detecting multiparticle entanglement of Dicke states
Bernd Lücke, Jan Peise, Giuseppe Vitagliano +4
Recent experiments demonstrate the production of many thousands of neutral atoms entangled in their spin degrees of freedom. We present a criterion for estimating the amount of ent…
Cold Atoms in Space: Community Workshop Summary and Proposed Road-Map
Ivan Alonso, Cristiano Alpigiani, Brett Altschul +246
We summarize the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportu…
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…
Production and manipulation of wave packets from ultracold atoms in an optical lattice
Poul L. Pedersen, Miroslav Gajdacz, Nils Winter +3
Within the combined potential of an optical lattice and a harmonic magnetic trap, it is possible to form matter wave packets by intensity modulation of the lattice. An analysis of…
Pump-probe coupling of matter wave packets to remote lattice states
Jacob F. Sherson, Sung Jong Park, Poul Pedersen +4
The coherent manipulation of wave packets is an important tool in many areas of physics. We demonstrate the experimental realization of quasi-free wave packets of ultra-cold atoms…
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…
Microcanonical and Canonical Fluctuations in Bose-Einstein Condensates -- Fock state sampling approach
Maciej BartÅomiej Kruk, Dawid Hryniuk, Mick Kristensen +4
The fluctuations of the atom number between a Bose-Einstein condensate and the surrounding thermal gas have been the subject of a long standing theoretical debate. This discussion…
Time limited optimal dynamics beyond the Quantum Speed Limit
Miroslav Gajdacz, Kunal K. Das, Jan Arlt +2
The quantum speed limit sets the minimum time required to transfer a quantum system completely into a given target state. At shorter times the higher operation speed has to be paid…
Non-destructive Faraday imaging of dynamically controlled ultracold atoms
Miroslav Gajdacz, Poul L. Pedersen, Troels Mørch +3
We describe an easily implementable method for non-destructive measurements of ultracold atomic clouds based on dark field imaging of spatially resolved Faraday rotation. The signa…