We trap and cool a gas composed of ${}^{40}\mathrm{K}$ and ${}^{87}\mathrm{Rb},$ using a two-species magneto-optical trap (MOT). This trap represents the first step towards cooling the Bose-Fermi mixture to quantum degeneracy. Laser light for the MOT is derived from laser diodes and amplified with a single high-power semiconductor amplifier chip. The four-color laser system is described, and the single-species and two-species MOTs are characterized. Atom numbers of $1\ifmmode\times\else\texttimes\fi{}{10}^{7}$ ${}^{40}\mathrm{K}$ and $2\ifmmode\times\else\texttimes\fi{}{10}^{9}$ ${}^{87}\mathrm{Rb}$ are trapped in the two-species MOT. Observation of trap loss due to collisions between species is presented and future prospects for the experiment are discussed.We trap and cool a gas composed of ${}^{40}\mathrm{K}$ and ${}^{87}\mathrm{Rb},$ using a two-species magneto-optical trap (MOT). This trap represents the first step towards cooling the Bose-Fermi mixture to quantum degeneracy. Laser light for the MOT is derived from laser diodes and amplified with a single high-power semiconductor amplifier chip. The four-color laser system is described, and the single-species and two-species MOTs are characterized. Atom numbers of $1\ifmmode\times\else\texttimes\fi{}{10}^{7}$ ${}^{40}\mathrm{K}$ and $2\ifmmode\times\else\texttimes\fi{}{10}^{9}$ ${}^{87}\mathrm{Rb}$ are trapped in the two-species MOT. Observation of trap loss due to collisions between species is presented and future prospects for the experiment are discussed.

arXiv:cond-mat/0108287Physical Review AJan 3, 200284 citations

Coherent population trapping

Thomas Lindvall, Mikko Merimaa, Ilkka Juhani Tittonen

Jan 1, 20011 citation

Exoergic cold collisions in a mixture of K-Rb

Gustavo Deczka Telles, Sérgio Ricardo Muniz, Vanderlei Salvador Bagnato +1 more

Summary form only given. Several theoretical studies have recently been published, proposing a new series of experiments involving two different species of atoms trapped together: two species BEC and heteronuclear cold collisions. As in the case of single species, these experiments require that samples be obtained at high density. Therefore, an important step is the understanding and possible control of heteronuclear collisions. In this context, the study of trap loss in a binary mixture comes at the right time and is significant. We report on a measurement of cross species trap loss rate for a system composed of /sup 39/K and /sup 85/Rb, and we implement an adapted Gallagher-Pritchard model to attempt to explain the experimental observations.Summary form only given. Several theoretical studies have recently been published, proposing a new series of experiments involving two different species of atoms trapped together: two species BEC and heteronuclear cold collisions. As in the case of single species, these experiments require that samples be obtained at high density. Therefore, an important step is the understanding and possible control of heteronuclear collisions. In this context, the study of trap loss in a binary mixture comes at the right time and is significant. We report on a measurement of cross species trap loss rate for a system composed of /sup 39/K and /sup 85/Rb, and we implement an adapted Gallagher-Pritchard model to attempt to explain the experimental observations.

Quantum Electronics and Laser Science ConferenceJan 1, 20000 citations

Traps for molecules

Physics WorldOct 1, 19980 citations

Theoretical and experimental study of a novel double-well optical dipole trap for two-species of cold atoms or molecules

Lu Jun-Fa, Qi Zhou, Pan Xiao-Qing +1 more

A novel scheme based on light diffraction to generate a double-well optical trap for trapping and controlling two-species samples of cold atoms or molecules is proposed. Specialized phase modulation similar to the binary phase-grating is implemented in a diffraction device of liquid crystal spatial light modulator (LC-SLM). A continuous and reversible evolution between single-well trap and double-well trap is investigated. Corresponding experiments are performed and the results are in agreement with theories. Our results show that the proposed scheme has a controllability advantage, which is beneficial to the loading and controlling two-species samples in cold atoms or molecules experiments.A novel scheme based on light diffraction to generate a double-well optical trap for trapping and controlling two-species samples of cold atoms or molecules is proposed. Specialized phase modulation similar to the binary phase-grating is implemented in a diffraction device of liquid crystal spatial light modulator (LC-SLM). A continuous and reversible evolution between single-well trap and double-well trap is investigated. Corresponding experiments are performed and the results are in agreement with theories. Our results show that the proposed scheme has a controllability advantage, which is beneficial to the loading and controlling two-species samples in cold atoms or molecules experiments.

Acta Physica SinicaJan 1, 20133 citations

We trap and cool a gas composed of

{}^{40}\mathrm{K}

and

{}^{87}\mathrm{Rb},

using a two-species magneto-optical trap (MOT). This trap represents the first step towards cooling the Bose-Fermi mixture to quantum degeneracy. Laser light for the MOT is derived from laser diodes and amplified with a single high-power semiconductor amplifier chip. The four-color laser system is described, and the single-species and two-species MOTs are characterized. Atom numbers of $1\ifmmode\times\else\texttimes\fi{}{10}^{7}$

{}^{40}\mathrm{K}

and $2\ifmmode\times\else\texttimes\fi{}{10}^{9}$

{}^{87}\mathrm{Rb}

are trapped in the two-species MOT. Observation of trap loss due to collisions between species is presented and future prospects for the experiment are discussed.