Time-averaged optical potentials for Bose-Einstein condensates

We report on our progress towards realization of a toroidal trap for Bose-Einstein condensates (BECs) of 87Rb using a time-averaged optical dipole potential. To achieve BEC we utilize a 20 W laser operating at 1064 nm to form an optical dipole trap in which we evaporatively cool the gas . Loading of the dipole trap is achieved by overlapping the dipole beams with a standard magnetic optical trap. Evaporative cooling is first performed in a single beam trap, followed by compression and additional confinement with a second orthogonal beam. This prevents stagnation of the evaporative cooling cycle, and allows the gain of 105 in phase space density necessary to achieve quantum degeneracy.We report on our progress towards realization of a toroidal trap for Bose-Einstein condensates (BECs) of 87Rb using a time-averaged optical dipole potential. To achieve BEC we utilize a 20 W laser operating at 1064 nm to form an optical dipole trap in which we evaporatively cool the gas . Loading of the dipole trap is achieved by overlapping the dipole beams with a standard magnetic optical trap. Evaporative cooling is first performed in a single beam trap, followed by compression and additional confinement with a second orthogonal beam. This prevents stagnation of the evaporative cooling cycle, and allows the gain of 105 in phase space density necessary to achieve quantum degeneracy.

Jan 1, 20110 citations

Time-averaged optical dipole traps for Bose-Einstein condensates

Leif Humbert, Mark A. Baker, D. Sigle +5 more

We report on our progress towards realization of a toroidal trap for Bose-Einstein condensates (BECs) of 87Rb using a time-averaged optical dipole potential. To achieve BEC we utilize a 20 W laser operating at 1064 nm to form an optical dipole trap in which we evaporatively cool the gas. Loading of the dipole trap is achieved by overlapping the dipole beams with a standard magnetic optical trap. Evaporative cooling is first performed in a single beam trap, followed by compression and additional confinement with a second orthogonal beam. This prevents stagnation of the evaporative cooling cycle, and allows the gain of 105 in phase space density necessary to achieve quantum degeneracy.We report on our progress towards realization of a toroidal trap for Bose-Einstein condensates (BECs) of 87Rb using a time-averaged optical dipole potential. To achieve BEC we utilize a 20 W laser operating at 1064 nm to form an optical dipole trap in which we evaporatively cool the gas. Loading of the dipole trap is achieved by overlapping the dipole beams with a standard magnetic optical trap. Evaporative cooling is first performed in a single beam trap, followed by compression and additional confinement with a second orthogonal beam. This prevents stagnation of the evaporative cooling cycle, and allows the gain of 105 in phase space density necessary to achieve quantum degeneracy.

Aug 1, 20111 citation

Weakly interacting Bose-Einstein condensate in a disordered optical potential

Theodore A. Corcovilos, D. Dries, J. M. Hitchcock +3 more

APSMay 1, 20080 citations

Bose-Einstein condensation of large numbers of atoms in a magnetic time-averaged orbiting potential trap

D. J. Han, R. H. Wynar, Ph. W. Courteille +1 more

We have observed Bose-Einstein condensation of large numbers of ${}^{87}\mathrm{Rb}$ atoms in a magnetic time-averaged orbiting potential (TOP) trap. Over $1.5\ifmmode\times\else\texttimes\fi{}{10}^{9}$ atoms are captured in the trap and evaporatively cooled to produce condensates containing up to $2\ifmmode\times\else\texttimes\fi{}{10}^{5}$ atoms. We discuss special considerations relating to the production of large Bose-Einstein condensates in a TOP trap, and present measurements of the condensate fraction for this case.We have observed Bose-Einstein condensation of large numbers of ${}^{87}\mathrm{Rb}$ atoms in a magnetic time-averaged orbiting potential (TOP) trap. Over $1.5\ifmmode\times\else\texttimes\fi{}{10}^{9}$ atoms are captured in the trap and evaporatively cooled to produce condensates containing up to $2\ifmmode\times\else\texttimes\fi{}{10}^{5}$ atoms. We discuss special considerations relating to the production of large Bose-Einstein condensates in a TOP trap, and present measurements of the condensate fraction for this case.

Physical Review AJun 1, 199872 citations

Atom Optics with Bose-Einstein Condensation Using Optical Potentials

Nadav Y. Katz, Eitan E. Rowen, Roee Ozeri +3 more

NATO science series. Series II, Mathematics, physics and chemistryJan 1, 20050 citations

We have observed Bose-Einstein condensation of large numbers of

{}^{87}\mathrm{Rb}

atoms in a magnetic time-averaged orbiting potential (TOP) trap. Over $1.5\ifmmode\times\else\texttimes\fi{}{10}^{9}$ atoms are captured in the trap and evaporatively cooled to produce condensates containing up to $2\ifmmode\times\else\texttimes\fi{}{10}^{5}$ atoms. We discuss special considerations relating to the production of large Bose-Einstein condensates in a TOP trap, and present measurements of the condensate fraction for this case.