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Trapping of Ultracold Atoms in a Hollow-core Photonic Crystal Fiber
Caleb A. Christensen, Sebastian Will, Michele Saba +4
Ultracold sodium atoms have been trapped inside a hollow-core optical fiber. The atoms are transferred from a free space optical dipole trap into a trap formed by a red-detuned gau…
Determination of the Superfluid Gap in Atomic Fermi Gases by Quasiparticle Spectroscopy
Andre Schirotzek, Yong-il Shin, Christian H. Schunck +1
We present majority and minority radiofrequency (RF) spectra of strongly interacting imbalanced Fermi gases of Li-6. We observed a smooth evolution in the nature of pairing correla…
Making, probing and understanding ultracold Fermi gases
Wolfgang Ketterle, Martin W. Zwierlein
A review on superfluidity and the BEC-BCS crossover in ultracold Fermi gases.
Critical velocity for superfluid flow across the BEC-BCS crossover
D. E. Miller, J. K. Chin, C. A. Stan +4
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 t…
Phase diagram for a Bose-Einstein condensate moving in an optical lattice
Jongchul Mun, Patrick Medley, Gretchen K. Campbell +3
The stability of superfluid currents in a system of ultracold bosons was studied using a moving optical lattice. Superfluid currents in a very weak lattice become unstable when the…
Tomographic RF Spectroscopy of a Trapped Fermi Gas at Unitarity
Y. Shin, C. H. Schunck, A. Schirotzek +1
We present spatially resolved radio-frequency spectroscopy of a trapped Fermi gas with resonant interactions and observe a spectral gap at low temperatures. The spatial distributio…