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13 papers
Interaction-free measurements by quantum Zeno stabilisation of ultracold atoms
J. Peise, B. Lücke, L. Pezzè +6
Quantum mechanics predicts that our physical reality is influenced by events that can potentially happen but factually do not occur. Interaction-free measurements (IFMs) exploit th…
Parametric amplification of vacuum fluctuations in a spinor condensate
C. Klempt, O. Topic, G. Gebreyesus +6
Parametric amplification of vacuum fluctuations is crucial in modern quantum optics, enabling the creation of squeezing and entanglement. We demonstrate the parametric amplificatio…
Dynamics of Bloch Oscillations in Disordered Lattice Potentials
T. Schulte, S. Drenkelforth, G. Kleine Büning +4
We present a detailed analysis of the dynamics of Bloch oscillations of Bose-Einstein condensates in disordered lattice potentials. Due to the disorder and the interparticle intera…
Collective excitation of Bose-Einstein condensates in the transition region between 3D and 1D
M. Kottke, T. Schulte, L. Cacciapuoti +4
We measure the frequency of the low m=0 quadrupolar excitation mode of weakly interacting Bose-Einstein condensates in the transition region from the 3D to the 1D mean-field regime…
Routes towards Anderson-Like localization of Bose-Einstein condensates in disordered optical lattices
T. Schulte, S. Drenkelforth, J. Kruse +5
We investigate, both experimentally and theoretically, possible routes towards Anderson-like localization of Bose-Einstein condensates in disordered potentials. The dependence of t…
Collisional Properties of Cold Spin-Polarized Metastable Neon Atoms
P. Spoden, M. Zinner, N. Herschbach +3
We measure the rates of elastic and inelastic two-body collisions of cold spin-polarized neon atoms in the metastable 3P2 state for 20^Ne and 22^Ne in a magnetic trap. From particl…