355 citations · 1.3k across the 12 of their papers we have counts for
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Matter-wave recombiners for trapped Bose-Einstein condensates
Tarik Berrada, Sandrine van Frank, Robert Bücker +5
Interferometry with trapped atomic Bose-Einstein condensates (BECs) requires the development of techniques to recombine the two paths of the interferometer and map the accumulated…
Bogoliubov theory for atom scattering into separate regions
T. Wasak, P. Szankowski, R. Bücker +2
We review the Bogoliubov theory in the context of recent experiments, where atoms are scattered from a Bose-Einstein Condensate into two well-separated regions. We find the full dy…
Integrated Mach-Zehnder interferometer for Bose-Einstein condensates
Tarik Berrada, Sandrine van Frank, Robert Bücker +3
Particle-wave duality enables the construction of interferometers for matter waves, which complement optical interferometers in precision measurement devices. This requires the dev…
Vibrational state inversion of a Bose-Einstein condensate: optimal control and state tomography
Robert Bücker, Tarik Berrada, Sandrine van Frank +6
We present theoretical and experimental results on high-fidelity transfer of a trapped Bose-Einstein condensate into its first vibrationally excited eigenstate. The excitation is d…
Dynamics of parametric matter wave amplification
Robert Bücker, Ulrich Hohenester, Tarik Berrada +7
We develop a model for parametric amplification, based on a density matrix approach, which naturally accounts for the peculiarities arising for matter waves: significant depletion…
Hanbury Brown and Twiss correlations across the Bose-Einstein condensation threshold
Aurélien Perrin, Robert Bücker, Stephanie manz +5
Hanbury Brown and Twiss (HBT) correlations, i.e. correlations in far-field intensity fluctuations, yield fundamental information on the quantum statistics of light sources, as high…
Twin-atom beams
Robert Bücker, Julian Grond, Stephanie Manz +7
We present highly efficient emission of twin-atom beams into a single transversal mode of a waveguide potential. The source is a one-dimensional degenerate Bose gas in the first ra…
Two-point phase correlations of a one-dimensional bosonic Josephson junction
Thomas Betz, Stephanie Manz, Robert Bücker +8
We realize a one-dimensional Josephson junction using quantum degenerate Bose gases in a tunable double well potential on an atom chip. Matter wave interferometry gives direct acce…
Two-point density correlations of quasicondensates in free expansion
S. Manz, R. Bücker, T. Betz +8
We measure the two-point density correlation function of freely expanding quasicondensates in the weakly interacting quasi-one-dimensional (1D) regime. While initially suppressed i…