1.8k citations · 5.6k across the 41 of their papers we have counts for
20 papers · 1 filter
Electric-field control of atom-molecule Feshbach resonances
Mara Meyer zum Alten Borgloh, Jule Heier, Fritz von Gierke +4
Ultracold molecules provide opportunities for exploring quantum matter, chemical dynamics and information processing thanks to their rich interactions, which can be controlled by e…
Formation of ultracold triatomic molecules by electric microwave association
Baraa Shammout, Leon Karpa, Silke Ospelkaus +2
A theoretical model is proposed for the formation of ultracold ground-state triatomic molecules in weakly bound energy levels. The process is driven by the electric component of a…
Blue-detuned molecular magneto-optical trap schemes based on bayesian optimization
S. Xu, R. Li, Y. Zhai +3
Direct laser cooling and trapping of molecules to temperature below Doppler limit and density exceeding are challenging due to the sub-Doppler heating effects of molecular m…
Engineering the sub-Doppler force in molecular magneto-optical traps
S. Xu, P. Kaebert, M. Stepanova +3
Current dual-frequency magneto-optical traps for ultracold molecules are plagued by sub-Doppler heating effects, making them vastly inferior to standard atomic MOTs. Here we demons…
Hyperfine dependent atom-molecule loss analyzed by the analytic solution of few-body loss equations
Kai K. Voges, Philipp Gersema, Torsten Hartmann +2
We prepare mixtures of ultracold K atoms in various hyperfine spin states and NaK molecules in an optical dipole trap at a fixed magnetic field and study inela…
Characterizing the Zeeman slowing force for CaF molecules
P. Kaebert, M. Stepanova, T. Poll +4
In this paper we investigate the feasibility of Zeeman slowing calcium monofluoride (CaF) molecules originating from a cryogenic buffer gas cell. We measure the $A^2Π_{1/2} (v=0, J…
Maximizing the capture velocity of molecular magneto-optical traps with Bayesian optimization
S Xu, P Kaebert, M Stepanova +3
Magneto-optical trapping (MOT) is a key technique on the route towards ultracold molecular ensembles. However, the realization and optimization of magneto-optical traps with their…
Probing photoinduced two-body loss of ultracold non-reactive bosonic NaRb and NaK molecules
P. Gersema, K. K. Voges, M. Meyer zum Alten Borgloh +7
We probe photo-induced loss for chemically stable bosonic NaRb and NaK molecules in chopped optical dipole traps where the molecules spend a significant…
Prospect for precision quantum logic spectroscopy of vibrational overtone transitions in molecular oxygen ions
Fabian Wolf, Jan C. Heip, Maximilian J. Zawierucha +3
Precision spectroscopy has been the driving force for progress of our physical understanding and still is a promising tool for the investigation of new physics. Molecules offer tra…
Beyond Born-Oppenheimer approximation in ultracold atomic collisions
Eberhard Tiemann, Philipp Gersema, Kai K. Voges +3
We report on deviations beyond the Born-Oppenheimer approximation in the potassium inter-atomic potentials. Identifying three up-to-now unknown -wave Feshbach resonances, we sig…
Type-II Zeeman slowing: Characterization and comparison to conventional radiative beam slowing schemes
Maurice Petzold, Paul Kaebert, Philipp Gersema +4
We describe a novel Zeeman slowing method reported in (Petzold et al (2018 New J. Phys. 20 042001)) and compare it to conventional radiative beam slowing schemes. The scheme is des…
Feshbach resonances in mixtures and refined molecular potentials for the NaK molecule
Torsten Hartmann, Torben A. Schulze, Kai K. Voges +5
We present a detailed study of interspecies Feshbach resonances of the bosonic mixture for magnetic fields up to in various…
Laser and Fourier transform spectroscopy of KCa
Julia Gerschmann, Erik Schwanke, Asen Pashov +3
KCa was produced in a heatpipe oven and its thermal emission spectrum around 8900 cm was recorded by a high resolution Fourier transform spectrometer. In addition, many sele…
Laser and Fourier transform spectroscopy of LiSr
Erik Schwanke, Horst Knöckel, Asen Pashov +3
LiSr was produced in a heat-pipe oven and its thermal emission spectrum around 9300 cm was recorded by a high resolution Fourier transform spectrometer. In addition, selecte…
A Zeeman slower for diatomic molecules
Maurice Petzold, Paul Kaebert, Philipp Gersema +2
We present a novel slowing scheme for beams of laser-coolable diatomic molecules reminiscent of Zeeman slowing of atomic beams. The scheme results in efficient compression of the 1…
Multi-channel modeling and two photon coherent transfer paths in NaK
T. A. Schulze, I. I. Temelkov, M. W. Gempel +4
We explore possible pathways for the creation of ultracold polar NaK molecules in their absolute electronic and rovibrational ground state starting from ultracold Feshbach molecule…
Quantum-State Controlled Chemical Reactions of Ultracold KRb Molecules
S. Ospelkaus, K. -K. Ni, D. Wang +7
How does a chemical reaction proceed at ultralow temperatures? Can simple quantum mechanical rules such as quantum statistics, single scattering partial waves, and quantum threshol…
Controlling the hyperfine state of rovibronic ground-state polar molecules
S. Ospelkaus, K. -K. Ni, G. Quemener +6
Ultracold molecules offer entirely new possibilities for the control of quantum processes due to their rich internal structure. Recently, near quantum degenerate gases of molecules…
Ultracold polar molecules near quantum degeneracy
S. Ospelkaus, K. -K. Ni, M. H. G. de Miranda +6
We report the creation and characterization of a near quantum-degenerate gas of polar K-Rb molecules in their absolute rovibrational ground state. Starting from weakl…
Ultracold dense gas of deeply bound heteronuclear molecules
S. Ospelkaus, A. Pe'er, K. -K. Ni +6
Recently, the quest for an ultracold and dense ensemble of polar molecules has attracted strong interest. Polar molecules have bright prospects for novel quantum gases with long-ra…