Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Vassen, Wim"'
Publikováno v:
Eur. Phys. J. D (2017) 71: 49
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 cooling in a dual-species magneto-optical trap, simultaneous MW- and RF-ind
Externí odkaz:
http://arxiv.org/abs/1611.01430
Publikováno v:
Phys. Rev. A 94, 050701 (2016)
In an ultracold, optically trapped mixture of $^{87}$Rb and metastable triplet $^4$He atoms we have studied trap loss for different spin-state combinations, for which interspecies Penning ionization is the main two-body loss process. We observe long
Externí odkaz:
http://arxiv.org/abs/1609.01098
Publikováno v:
Appl. Phys. B 121, 391 (2015)
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 3 W. Our scheme is based on RF-induced evaporative cooling in a quadr
Externí odkaz:
http://arxiv.org/abs/1508.04019
Publikováno v:
Eur. Phys. J. D 69, 52 (2015)
We have realized Bose-Einstein condensation (BEC) of 87Rb in the F=2, m_F=2 hyperfine substate in a hybrid trap, consisting of a quadrupole magnetic field and a single optical dipole beam. The symmetry axis of the quadrupole magnetic trap coincides w
Externí odkaz:
http://arxiv.org/abs/1411.7628
Publikováno v:
Physical Review A 90, 052508 (2014)
We have calculated ac polarizabilities of the $2 \ ^3S$ and $2 \ ^1S$ states of both $^4$He and $^3$He in the range 318 nm to 2.5 $\mu$m and determined the magic wavelengths at which these polarizabilities are equal for either isotope. The calculatio
Externí odkaz:
http://arxiv.org/abs/1410.3242
Autor:
Notermans, Remy, Vassen, Wim
Publikováno v:
Phys. Rev. Lett. 112, 253002 (2014)
We have measured the forbidden 2 3S1 - 2 1P1 transition at 887 nm in a quantum degenerate gas of metastable He-4 atoms confined in an optical dipole trap. The determined transition frequency is 338 133 594.4 (0.5) MHz, from which we obtain an ionizat
Externí odkaz:
http://arxiv.org/abs/1404.1759
Autor:
Vassen, Wim Null, Cohen-Tannoudji, Claude, Leduc, Michèle, Boiron, Denis, Westbrook, Christoph I, Truscott, Andrew, Baldwin, Ken, Birkl, Gerhard, Cancio, Pablo, Trippenbach, Marek
Publikováno v:
Reviews of Modern Physics 84, 1 (2012) 175
We review experimental and theoretical work on cold, trapped metastable noble gases. We em- phasize the aspects which distinguish work with these atoms from the large body of work on cold, trapped atoms in general. These aspects include detection tec
Externí odkaz:
http://arxiv.org/abs/1110.1361
Autor:
Vassen, Wim
Publikováno v:
Science, 2017 Oct 01. 358(6359), 39-40.
Externí odkaz:
https://www.jstor.org/stable/26399972
Autor:
Jeltes, Tom, McNamara, John M., Hogervorst, Wim, Vassen, Wim, Krachmalnicoff, Valentina, Schellekens, Martijn, Perrin, Aurélien, Chang, Hong, Boiron, Denis, Aspect, Alain, Westbrook, Christoph I.
Publikováno v:
Nature 445 (2007) 402
Fifty years ago, Hanbury Brown and Twiss (HBT) discovered photon bunching in light emitted by a chaotic source, highlighting the importance of two-photon correlations and stimulating the development of modern quantum optics . The quantum interpretati
Externí odkaz:
http://arxiv.org/abs/cond-mat/0612278
Autor:
Westbrook, Christoph I., Schellekens, Martijn, Perrin, Aurélien, Krachmalnicoff, Valentina, Gomes, Jose Carlos Viana, Trebbia, Jean-Baptiste, Estève, Jérôme, Chang, Hong, Bouchoule, Isabelle, Boiron, Denis, Aspect, Alain, Jeltes, Tom, McNamara, John, Hogervorst, Wim, Vassen, Wim
Publikováno v:
AIP Conference Proceedings Vol. 869, Autriche (2006) 181-190
We discuss experiments to produce and detect atom correlations in a degenerate or nearly degenerate gas of neutral atoms. First we treat the atomic analog of the celebrated Hanbury Brown Twiss experiment, in which atom correlations result simply from
Externí odkaz:
http://arxiv.org/abs/quant-ph/0609019