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Search Publications by: Eric A. Cornell ()

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Displaying 76 - 100 of 129

Experiments in Dilute Atomic Bose-Einstein Condensation

November 1, 1999
Author(s)
Eric A. Cornell, J R. Ensher, C E. Wieman
Why BEC? - In the month we began writing this paper, fourteen papers on the explicit topic of Bose-Einstein condensation (BEC) in a dilute gas appeared in the pages of Physical Review. Both theoretical and experimental activity in BEC has expanded

Towards Quantum Degeneracy of Bosonic and Fermionic Potassium Atoms

November 1, 1999
Author(s)
F S. Cataliotti, Eric A. Cornell, C Fort, M Inguscio, M Prevedelli, G M. Tino
These notes are devoted to a discussion of the results we obtained during the last two years in experiments of confinement and cooling of bosonic and fermionic potassium atoms towards quantum degeneracy. Further details on these experiments can be found in

Vortices in a Bose-Einstein Condensate

September 1, 1999
Author(s)
M R. Matthews, B P. Anderson, P C. Haljan, C E. Wieman, Eric A. Cornell
We have created vortices in two-component Bose-einstein condensates. The vortex state was created through a coherent process involving the spatial and temporal control of interconversion between the two components. Using an interference technique, we map

External Radiative Quantum Efficiency of 96 % from a GaAs/GaInP Heterostructure

March 1, 1999
Author(s)
H G. Gauck, T H. Gforerer, M J. Renn, Eric A. Cornell, Kristine A. Bertness
GaAs/GaInP double heterostructures are index matched with ZnSe hemispheres to increase the coupling of photoluminescence out of the device. We measure external quantum efficiencies as large as 96 % using a bolometric calibration technique. When the

Trapping and Cooling of Potassium Isotopes in a Double-Magneto-Optical-Trap Apparatus

January 1, 1999
Author(s)
M Prevedelli, F S. Cataliotti, Eric A. Cornell, J R. Ensher, C Fort, L Ricci, G M. Tino, M Inguscio
We report on teh efficient operation of a double-magneto-optical-trap (MOT) apparatus for potassium isopes. Mechanisms for the cooling and the transfer between the two MOTs are studied. A magnetic quadrupole trap has been loaded from the second MOT

Resonant Magnetic Field Control of Elastic Scattering in Cold 85Rb

December 1, 1998
Author(s)
J L. Roberts, N R. Claussen, J P. Burke, C H. Greene, Eric A. Cornell, C E. Wieman
A magnetic field-dependent Feshbach resonance has been observed in the elastic scattering collision rate between stoms in the F = 2, M = -2 state of 85Rb. Changing the magnetic field by several Gauss caused the collision rate to vary by a factor of 10 4

Dynamical Response of a Bose-Einstein Condensate to a Discontinuous Change in Internal State

July 1, 1998
Author(s)
M R. Matthews, D S. Hall, D S. Jin, J R. Ensher, C E. Wieman, Eric A. Cornell, F Dalfovo, C Minniti, S Stringari
A two photon transition is used to rapidly convert an arbitrary fraction of 87Rb atoms from a [F=1, m f=-1>condenstate to the [F=2,n f=2>state. Transferring the entire population imposes a discontinuous change on the condensate's mean-field repulsion

Magneto-Optical Trapping of Fermionic Potassium Atoms

February 1, 1998
Author(s)
F S. Cataliotti, Eric A. Cornell, C Fort, M Inguscio, F Marin, M Prevedelli, G M. Tino
We have trapped 40K in a vapor-cell magneto-optical trap starting from a natural abundance sample. This rare, weakly radioactive atom is a Fermion. The number of trapped atoms is approximately 8000 with a density of approximately equal to} 10 8 atoms/cm 3