Zobrazeno 1 - 10
of 167
pro vyhledávání: '"van Kempen, E."'
Ultracold atoms are increasingly used for high precision experiments that can be utilized to extract accurate scattering properties. This calls for a stronger need to improve on the accuracy of interatomic potentials, and in particular the usually ra
Externí odkaz:
http://arxiv.org/abs/0811.0314
Autor:
Tong, D., Farooqi, S. M., van Kempen, E. G. M., Pavlovic, Z., Stanojevic, J., Côté, R., Eyler, E. E., Gould, P. L.
We report the observation of dipole-forbidden, but quadrupole-allowed, one-photon transitions to high Rydberg states in Rb. Using pulsed UV excitation of ultracold atoms in a magneto-optical trap, we excite $5s \to nd$ transitions over a range of pri
Externí odkaz:
http://arxiv.org/abs/0809.2341
Autor:
Chevy, Frédéric, Van Kempen, E. G. M., Bourdel, T., Zhang, J., Khaykovich, L., Teichmann, M., Tarruell, L., Kokkelmans, S. J. J. M. F., Salomon, C.
We present a semi-analytical treatment of both the elastic and inelastic collisional properties near a p-wave Feshbach resonance. Our model is based on a simple three channel system that reproduces more elaborate coupled-channel calculations. We stre
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412393
Autor:
Zhang, J., Van Kempen, E. G. M., Bourdel, T., Khaykovich, L., Cubizolles, J., Chevy, F., Teichmann, M., Tarruell, L., Kokkelmans, S. J. J. M. F., Salomon, C.
We report on experiments in $^6$Li Fermi gases near Feshbach resonances. A broad s-wave resonance is used to form a Bose-Einstein condensate of weakly bound $^6$Li$_2$ molecules in a crossed optical trap. The measured molecule-molecule scattering len
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410167
Autor:
Zhang, J., Van Kempen, E. G. M., Bourdel, T., Khaykovich, L., Cubizolles, J., Chevy, F., Teichmann, M., Tarruell, L., Kokkelmans, S. J. J. M. F., Salomon, C.
We report the observation of three p-wave Feshbach resonances of $^6$Li atoms in the lowest hyperfine state $f=1/2$. The positions of the resonances are in good agreement with theory. We study the lifetime of the cloud in the vicinity of the Feshbach
Externí odkaz:
http://arxiv.org/abs/quant-ph/0406085
Publikováno v:
Phys. Rev. A 70, 012701 (2004).
Feshbach resonances are commonly described by a single-resonance Feshbach model, and open-channel resonances are not taken into account explicitly. However, an open-channel resonance near threshold limits the range of validity of this model. Such a s
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402278
Autor:
Gupta, S., Hadzibabic, Z., Zwierlein, M. W., Stan, C. A., Dieckmann, K., Schunck, C. H., van Kempen, E. G. M., Verhaar, B. J., Ketterle, W.
Publikováno v:
Science, Vol. 300, 13 June 2003: 1723-1726
Radio-frequency techniques were used to study ultracold fermions. We observed the absence of mean-field "clock" shifts, the dominant source of systematic error in current atomic clocks based on bosonic atoms. This is a direct consequence of fermionic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0307259
Publikováno v:
Phys. Rev. Lett. 89, 283202 (2002)
More than 40 Feshbach resonances in rubidium 87 are observed in the magnetic field range between 0.5 and 1260 G for various spin mixtures in the lower hyperfine ground state. The Feshbach resonances are observed by monitoring the atom loss, and their
Externí odkaz:
http://arxiv.org/abs/cond-mat/0210651
Inter-isotope determination of ultracold rubidium interactions from three high-precision experiments
Combining the measured binding energies of four of the most weakly bound rovibrational levels of the $^{87}$Rb$_2$ molecule with the results of two other recent high-precision rubidium experiments, we obtain exceptionally strong constraints on the at
Externí odkaz:
http://arxiv.org/abs/cond-mat/0110610
Publikováno v:
Epidemiology and Infection, 2000 Dec 01. 125(3), 505-522.
Externí odkaz:
https://www.jstor.org/stable/3864846
