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5 papers · 2 filters
Plasticity-induced structural anisotropy of silica glass
Cindy Linn Rountree, Damien Vandembroucq, Mehdi Talamali +2
Amorphous silica density at ambient pressure is known to depend on thermal history (through the quenching rate) but also, at room temperature, on the maximum pressure applied in th…
Stable Bloch oscillations of cold atoms with time-dependent interaction
C. Gaul, R. P. A. Lima, E. Diaz +2
We investigate Bloch oscillations of interacting cold atoms in a mean-field framework. In general, atom-atom interaction causes dephasing and destroys Bloch oscillations. Here, we…
Manipulation of quantum particles in rapidly oscillating potentials by inducing phase hops
Armin Ridinger, Christoph Weiss
Analytical calculations show that the mean-motion of a quantum particle trapped by a rapidly oscillating potential can be significantly manipulated by inducing phase hops, i.e., by…
Photon-assisted tunneling in optical lattices: Ballistic transport of interacting boson pairs
Christoph Weiss, Heinz-Peter Breuer
In a recent experiment [PRL 100, 040404 (2008)] an analog of photon-assisted tunneling has been observed for a Bose-Einstein condensate in an optical lattice subject to a constant…
Unified picture of superfluidity: From Bogoliubov's approximation to Popov's hydrodynamic theory
N. Dupuis
Using a non-perturbative renormalization-group technique, we compute the momentum and frequency dependence of the anomalous self-energy and the one-particle spectral function of tw…