392 citations · 1.2k across the 29 of their papers we have counts for
29 papers
Precision spectroscopy of helium in a magic wavelength optical dipole trap
R. J. Rengelink, Y. van der Werf, R. P. M. J. W. Notermans +4
Improvements in both theory and frequency metrology of few-electron systems such as hydrogen and helium have enabled increasingly sensitive tests of quantum electrodynamics (QED),…
An ultracold, optically trapped mixture of {87}Rb and metastable {4}He atoms
Adonis Silva Flores, Hari Prasad Mishra, Wim Vassen +1
We report on the realization of an ultracold (<25~muK) mixture of rubidium ({87}Rb) and metastable triplet helium ({4}He) in an optical dipole trap. Our scheme involves laser cooli…
Quantum-State Controlled Penning Ionization Reactions between Ultracold Alkali and Metastable Helium Atoms
Adonis Silva Flores, Wim Vassen, Steven Knoop
In an ultracold, optically trapped mixture of Rb and metastable triplet He atoms we have studied trap loss for different spin-state combinations, for which interspecies…
Comparison of spectral linewidths for quantum degenerate bosons and fermions
R. P. M. J. W. Notermans, R. J. Rengelink, W. Vassen
We observe a dramatic difference in optical line shapes of a Bose-Einstein condensate and a degenerate Fermi gas by measuring the 1557-nm …
A simple 2 W continuous-wave laser system for trapping ultracold metastable helium atoms at the 319.8 nm magic wavelength
R. J. Rengelink, R. P. M. J. W. Notermans, W. Vassen
High precision spectroscopy on the transition is possible in ultracold optically trapped helium but the accuracy is limited by the ac-Stark shift in…
Simple method for producing Bose-Einstein condensates of metastable helium using a single beam optical dipole trap
Adonis Silva Flores, Hari Prasad Mishra, Wim Vassen +1
We demonstrate a simple scheme to reach Bose-Einstein condensation (BEC) of metastable triplet helium atoms using a single beam optical dipole trap with moderate power of less than…