Critical velocity for superfluid flow across the BEC-BCS crossover (2007)
Miller, D. E., Chin, J. K., Stan, C. A., Liu, Y., Setiawan, W., Sanner, C., ...
Critical velocities have been observed in an ultracold superfluid Fermi gas throughout the BEC-BCS crossover. A pronounced peak of the critical velocity at unitarity demonstrates that superfluidity...
Fractional-period excitations in continuum periodic systems (2006)
Nistazakis, H. E., Porter, Mason A., Kevrekidis, P. G., Frantzeskakis, D. J., Nicolin, A., Chin, J. K.
We investigate the generation of fractional-period states in continuum periodic systems. As an example, we consider a Bose-Einstein condensate confined in an optical-lattice potential. We show that...
Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice (2006)
Chin, J. K., Miller, D. E., Liu, Y., Stan, C., Setiawan, W., Sanner, C., ...
The study of superfluid fermion pairs in a periodic potential has important ramifications for understanding superconductivity in crystalline materials. Using cold atomic gases, various condensed...
Observation of Strong Quantum Depletion in a Gaseous Bose-Einstein Condensate (2006)
Xu, K., Liu, Y., Miller, D. E., Chin, J. K., Setiawan, W., Ketterle, W.
We studied quantum depletion in a gaseous Bose-Einstein condensate. An optical lattice enhanced the atomic interactions and modified the dispersion relation resulting in strong quantum depletion. The...
Fractional-Period Excitations in Continuum Periodic Systems (2005)
Nistazakis, H. E., Porter, Mason A., Kevrekidis, P. G., Frantzeskakis, D. J., Nicolin, A., Chin, J. K.
We investigate the generation of fractional-period states in continuum periodic systems. As an example, we consider a Bose-Einstein condensate confined in an optical-lattice potential. We show that...
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}$...
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...
Chin, J. K., Vogels, J. M., Ketterle, W.
We study the collapse of large homogeneous Bose-Einstein condensates due to intrinsic attractive interactions. We observe the amplification of a local instability by seeding a momentum state $\bf{p}$...
Coherent Collisions between Bose-Einstein Condensates (2002)
Vogels, J. M., Chin, J. K., Ketterle, W.
We study the non-degenerate parametric amplifier for matter waves, implemented by colliding two Bose-Einstein condensates. The coherence of the amplified waves is shown by observing high contrast...
Liver/spleen scintigraphy for diagnosis of splenic infarction in cirrhotic patients.
Chin, J. K., McCormick, P. A., Hilson, A. J., Burroughs, A. K., McIntyre, N.
Splenic infarction is rare in cirrhotic patients. The diagnosis of the condition is based on clinical findings and splenic imaging. In recent years, ultrasonography and computed tomographic scan have...