Publications (10)
Bragg spectroscopy of a superfluid Bose-Hubbard gas
X. Du, Shoupu Wan, Emek Yesilada +4
Bragg spectroscopy is used to measure excitations of a trapped, quantum-degenerate gas of 87Rb atoms in a 3-dimensional optical lattice. The measurements are carried out over a ran…
Quantized Rotation of Atoms From Photons with Orbital Angular Momentum
M. F. Andersen, C. Ryu, Pierre Clade +4
We demonstrate the coherent transfer of the orbital angular momentum of a photon to an atom in quantized units of hbar, using a 2-photon stimulated Raman process with Laguerre-Gaus…
Experimental demonstration of painting arbitrary and dynamic potentials for Bose-Einstein condensates
K. Henderson, C. Ryu, C. MacCormick +1
There is a pressing need for robust and straightforward methods to create potentials for trapping Bose-Einstein condensates which are simultaneously dynamic, fully arbitrary, and s…
Experimental realization of Josephson junctions for an Atom SQUID
C. Ryu, A. A. Blinova, P. W. Blackburn +1
We report the creation of a pair of Josephson junctions on a toroidal dilute gas Bose-Einstein condensate (BEC), a configuration that is the cold atom analog of the well-known dc s…
Observation of a 2D Bose-gas: from thermal to quasi-condensate to superfluid
P. Cladé, C. Ryu, A. Ramanathan +2
We present experimental results on a Bose gas in a quasi-2D geometry near the Berezinskii, Kosterlitz and Thouless (BKT) transition temperature. By measuring the density profile, \…
Raman-induced oscillation between an atomic and a molecular quantum gas
C. Ryu, X. Du, Emek Yesilada +4
It has recently been demonstrated that quantum degenerate gases of very weakly bound molecules can be produced by atomic gases with Feshbach resonances. More strongly bound molecul…