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54 papers · 1 filter
Loss of superfluidity by fermions in the boson Hubbard model on an optical lattice
Roman M. Lutchyn, Sumanta Tewari, S. Das Sarma
The experimentally observed loss of superfluidity by introducing fermions to the boson Hubbard system on an optical lattice is explained. We show that the virtual transitions of th…
Temporal and Spatial Dependence of Quantum Entanglement from a Field Theory Perspective
Shih-Yuin Lin, B. L. Hu
We consider the entanglement dynamics between two Unruh-DeWitt detectors at rest separated at a distance . This simple model when analyzed properly in quantum field theory shows…
Feshbach Resonances in Ultracold Gases
Cheng Chin, Rudolf Grimm, Paul Julienne +1
Feshbach resonances are the essential tool to control the interaction between atoms in ultracold quantum gases. They have found numerous experimental applications, opening up the w…
Effective three-body interactions of neutral bosons in optical lattices
P. R. Johnson, E. Tiesinga, J. V. Porto +1
We show that there are effective three- and higher-body interactions generated by the two-body collisions of atoms confined in the lowest vibrational states of a 3D optical lattice…
Ultracold polar molecules near quantum degeneracy
S. Ospelkaus, K. -K. Ni, M. H. G. de Miranda +6
We report the creation and characterization of a near quantum-degenerate gas of polar K-Rb molecules in their absolute rovibrational ground state. Starting from weakl…
Lifetime measurements of the 5d states of rubidium
D. Sheng, A. Perez Galvan, L. A. Orozco
We present lifetime measurements of the and states of rubidium using the time correlated single photon counting method. We perform the experiment in a magneto…