Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Berrada, Tarik"'
Autor:
Pigneur, Marine, Berrada, Tarik, Bonneau, Marie, Schumm, Thorsten, Demler, Eugene, Schmiedmayer, Jörg
Publikováno v:
Phys. Rev. Lett., 120, 173601 (2018)
We present an experimental study on the non-equilibrium tunnel dynamics of two coupled one-dimensional Bose-Einstein quasi-condensates deep in the Josephson regime. Josephson oscillations are initiated by splitting a single one-dimensional condensate
Externí odkaz:
http://arxiv.org/abs/1711.06635
Autor:
Berrada, Tarik, van Frank, Sandrine, Bücker, Robert, Schumm, Thorsten, Schaff, Jean-François, Schmiedmayer, Jörg, Julía-Díaz, Bruno, Polls, Artur
Publikováno v:
Phys. Rev. A 93, 063620 (2016)
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 phase difference to a measurable atom number difference. We have imple
Externí odkaz:
http://arxiv.org/abs/1512.08127
Publikováno v:
Phys. Rev. A 92, 053632 (2016)
We theoretically investigate the creation of squeezed states of a Bose-Einstein Condensate (BEC) trapped in a magnetic double well potential. The number or phase squeezed states are created by modulating the tunnel coupling between the two wells peri
Externí odkaz:
http://arxiv.org/abs/1511.03146
Autor:
Gring, Michael, Gerlich, Stefan, Eibenberger, Sandra, Nimmrichter, Stefan, Berrada, Tarik, Arndt, Markus, Ulbricht, Hendrik, Hornberger, Klaus, Müri, Marcel, Mayor, Marcel, Böckmann, Marcus, Doltsinis, Nikos
Publikováno v:
Phys. Rev. A 81, 031604(R) (2010)
We investigate the influence of thermally activated internal molecular dynamics on the phase shifts of matter waves inside a molecule interferometer. While de Broglie physics generally describes only the center-of-mass motion of a quantum object, our
Externí odkaz:
http://arxiv.org/abs/1405.4649
Autor:
van Frank, Sandrine, Negretti, Antonio, Berrada, Tarik, Bücker, Robert, Montangero, Simone, Schaff, Jean-François, Schumm, Thorsten, Calarco, Tommaso, Schmiedmayer, Jörg
Publikováno v:
Nature Communications 5, 4009 (2014)
We demonstrate a two-pulse Ramsey-type interferometer for non-classical motional states of a Bose-Einstein condensate in an anharmonic trap. The control pulses used to manipulate the condensate wavefunction are obtained from Optimal Control Theory an
Externí odkaz:
http://arxiv.org/abs/1402.0377
Autor:
Berrada, Tarik, van Frank, Sandrine, Bücker, Robert, Schumm, Thorsten, Schaff, Jean-François, Schmiedmayer, Jörg
Publikováno v:
Nature Communications 4, 2077
Particle-wave duality enables the construction of interferometers for matter waves, which complement optical interferometers in precision measurement devices. This requires the development of atom-optics analogs to beam splitters, phase shifters, and
Externí odkaz:
http://arxiv.org/abs/1303.1030
Autor:
Bücker, Robert, Berrada, Tarik, van Frank, Sandrine, Schaff, Jean-François, Schumm, Thorsten, Schmiedmayer, Jörg, Jäger, Georg, Grond, Julian, Hohenester, Ulrich
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 46 104012 (2013)
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 driven by mechanical motion of the trap, along a trajectory obtained fr
Externí odkaz:
http://arxiv.org/abs/1212.4173
Publikováno v:
Physical reviewA 86 (2012) 043626
We investigate the momentum distribution of weakly interacting 1D Bose gases at thermal equilibrium both experimentally and theoretically. Momentum distribution of single 1D Bose gases is measured using a focusing technique, whose resolution we impro
Externí odkaz:
http://arxiv.org/abs/1207.2855
Autor:
Bücker, Robert, Hohenester, Ulrich, Berrada, Tarik, van Frank, Sandrine, Perrin, Aurélien, Manz, Stephanie, Betz, Thomas, Grond, Julian, Schumm, Thorsten, Schmiedmayer, Jörg
Publikováno v:
Phys. Rev. A 86, 013638 (2012)
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 and explicit time-dependence of the source state population, long inte
Externí odkaz:
http://arxiv.org/abs/1203.5357