Measurement of the Beta-Neutrino Correlation of Sodium-21 using Shakeoff Electrons (2008)
Vetter, P. A., Abo-Shaeer, J. R., Freedman, S. J., Maruyama, R.
The beta-neutrino correlation coefficient, $a_{\beta\nu}$, is measured in sodium-21 by detecting the time-of-flight of the recoil nucleus detected in coincidence with the atomic electrons shaken off...
Sodium Bose-Einstein Condensates in an Optical Lattice (2005)
Xu, K., Liu, Y., Abo-Shaeer, J. R., Mukaiyama, T., Chin, J. K., Miller, D. E., ...
The phase transition from a superfluid to a Mott insulator has been observed in a $^{23}$Na Bose-Einstein condensate. A dye laser detuned $\approx 5$nm red of the Na $3^2$S$ \to 3^2$P$_{1/2}$...
Vortices and Superfluidity in a Strongly Interacting Fermi Gas (2005)
Zwierlein, M. W., Abo-Shaeer, J. R., Schirotzek, A., Schunck, C. H., Ketterle, W.
Quantum-degenerate Fermi gases provide a remarkable opportunity to study strongly interacting fermions. In contrast to other Fermi systems, such as superconductors, neutron stars or the quark-gluon...
High-Contrast Interference in a Thermal Cloud of Atoms (2004)
Miller, D. E., Anglin, J. R., Abo-Shaeer, J. R., Xu, K., Chin, J. K., Ketterle, W.
The coherence properties of a gas of bosonic atoms above the BEC transition temperature were studied. Bragg diffraction was used to create two spatially separated wave packets, which interfere during...
Coherent Molecular Optics using Sodium Dimers (2004)
Abo-Shaeer, J. R., Miller, D. E., Chin, J. K., Xu, K., Mukaiyama, T., Ketterle, W.
Coherent molecular optics is performed using two-photon Bragg scattering. Molecules were produced by sweeping an atomic Bose-Einstein condensate through a Feshbach resonance. The spectral width of...
Dissociation and Decay of Ultra-cold Sodium Molecules (2003)
Mukaiyama, T., Abo-Shaeer, J. R., Xu, K., Chin, J. K., Ketterle, W.
The dissociation of ultracold molecules is studied by ramping an external magnetic field through a Feshbach resonance. The observed dissociation energy shows non-linear dependence on the ramp speed...
Formation of Quantum-Degenerate Sodium Molecules (2003)
Xu, K., Mukaiyama, T., Abo-Shaeer, J. R., Chin, J. K., Miller, D. E., Ketterle, W.
Ultra-cold sodium molecules were produced from an atomic Bose-Einstein condensate by ramping an applied magnetic field across a Feshbach resonance. More than $10^5$ molecules were generated with a...
Experimental observation of the Bogoliubov transformation for a Bose-Einstein condensed gas (2001)
Vogels, J. M., Xu, K., Raman, C., Abo-Shaeer, J. R., Ketterle, W.
Phonons with wavevector $q/\hbar$ were optically imprinted into a Bose-Einstein condensate. Their momentum distribution was analyzed using Bragg spectroscopy with a high momentum transfer. The...
Formation and Decay of Vortex Lattices in Bose-Einstein Condensates at Finite Temperatures (2001)
Abo-Shaeer, J. R., Raman, C., Ketterle, W.
The dynamics of vortex lattices in stirred Bose-Einstein condensates have been studied at finite temperatures. The decay of the vortex lattice was observed non-destructively by monitoring the...
Vortex Nucleation in a Stirred Bose-Einstein Condensate (2001)
Raman, C., Abo-Shaeer, J. R., Vogels, J. M., Xu, K., Ketterle, W.
We studied the nucleation of vortices in a Bose-Einstein condensate stirred by a laser beam. We observed the vortex cores using time-of-flight absorption imaging. By varying the size of the stirrer,...
Realization of Bose-Einstein condensates in lower dimensions (2001)
Gorlitz, A., Vogels, J. M., Leanhardt, A. E., Raman, C., Gustavson, T. L., Abo-Shaeer, J. R., ...
Bose-Einstein condensates of sodium atoms have been prepared in optical and magnetic traps in which the energy-level spacing in one or two dimensions exceeds the interaction energy between atoms,...
Dissipationless flow and superfluidity in gaseous Bose-Einstein condensates (2000)
Raman, C., Onofrio, R., Vogels, J. M., Abo-Shaeer, J. R., Ketterle, W.
We study dissipation in a dilute Bose gas induced by the motion of a macroscopic object. A blue-detuned laser beam focused on the center of a trapped gas of sodium atoms was scanned both above and...