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Displaying records 161 to 167.
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161. Laser Cooling and Trapping Group - WWW Home Page
Published: Date unknown
Authors: Paul D Lett, Kristian Helmerson, William D Phillips
Abstract: The laser cooling and trapping group studies the physics of laser cooling, electromagnetic trapping and other radiative manipulation of neutral atoms and dielectric particles. These fundamental studies are used to develop applications to new kinds o ...

162. Observation of Persistent Flow of a Bose-Einstein Condensate in a Toroidal Trap
Published: Date unknown
Authors: Changhyun Ryu, Mikkel Andersen, Pierre Clade, Vasant Natarajan, Kristian Helmerson, William D Phillips
Abstract: We have observed the persistent flow of Bose-condensed atoms in a toroidal trap. The flow persists without decay for up to 10 s, limited only by experimental factors such as drift and trap lifetime. The quantized rotation was initiated by transferr ...

163. Quantized Rotation of Atoms From Photons With Orbital Angular Momentum
Published: Date unknown
Authors: Mikkel Andersen, Changhyun Ryu, Pierre Clade, Vasant Natarajan, A Vaziri, Kristian Helmerson, William D Phillips
Abstract: Light can carry two kinds of angular momentum: Spin angular momentum (SAM) associated with its polarization and orbital angular momentum (OAM) associated with its spatial mode [1, 2]. The coupling of optical SAM to atoms has been known for over a cen ...

164. Study of a 1D Interacting Quantum Bose Gas
Published: Date unknown
Authors: B Laburthe, K M O'Hara, J H Huckans, M Anderlini, James V Porto, S L. Rolston, William D Phillips
Abstract: The loading of a Bose-Einstein condensate into a deep 2D optical lattice provides a unique way to study 1D Bose gases: the strong radial confinement freezes any motion in two dimensions, and for deep enough lattices, the system can be seen as an arra ...

165. Subwavelength Addressibility and Spin-Dependent Transport in a Double-Well Optical Lattice
Published: Date unknown
Authors: Patricia J. Lee, M Anderlini, Ben L. Brown, Jennifer Sebby-Strabley, William D Phillips, James V Porto
Abstract: We report the experimental demonstration of site-selective RF addressing of atoms with sub-wavelength resolution in a spin-dependent optical lattice of double wells. We also show spin-dependent transport: coherent spatial separation of atomic wave pa ...

166. The Mott Insulator Transition in a Two Dimensional Atomic Bose Gas
Published: Date unknown
Authors: Ian B Spielman, William D Phillips, James V Porto
Abstract: Cold atoms confined in periodic potentials are remarkably versatile quantum systems for implementing simple models prevalent in condensed matter theory. Here we realize the 2D Bose-Hubbard model by loading a Bose-Einstein condensate into an optical l ...

167. Transport of Atoms in a Quantum Conveyor Belt
Published: Date unknown
Authors: A Browaeys, H H ffnert, C R McKenzie, S L. Rolston, Kristian Helmerson, William D Phillips
Abstract: We have performed experiments using a 3D-Bose-Einstein condensate of sodium atoms in a 1D optical lattice to explore some unusual properties of band-structure. In particular, we investigate the loading of a condensate into a moving lattice and find ...

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