Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects

Q 30.74: Poster

Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais

Generating Mesoscopic Bell States via Collisions of Distinguishable Quantum Bright SolitonsBettina Gertjerenken1, Thomas Billam2, Caroline Blackley3, Ruth Le Sueur3, Lev Khaykovich4, Simon Cornish5, and •Christoph Weiss51Carl von Ossietzky Universität, Oldenburg, Germany — 2Department of Physics, University of Otago, Dunedin, New Zealand — 3Department of Chemistry, JQC Durham-Newcastle, Durham University, Durham, United Kingdom — 4Department of Physics, Bar-Ilan University, Ramat-Gan, Israel — 5Department of Physics, JQC Durham-Newcastle, Durham University, Durham, United Kingdom

We investigate numerically the collisions of two distinguishable quantum matter-wave bright solitons in a one-dimensional harmonic trap. We show that such collisions can be used to generate mesoscopic Bell states that can reliably be distinguished from statistical mixtures. Calculation of the relevant s-wave scattering lengths predicts that such states could potentially be realized in quantum-degenerate mixtures of 85Rb and 133Cs. In addition to fully quantum simulations for two distinguishable two-particle solitons, we use a mean-field description supplemented by a stochastic treatment of quantum fluctuations in the soliton’s center of mass: we demonstrate the validity of this approach by comparison to a mathematically rigorous effective potential treatment of the quantum many-particle problem.

[1] B. Gertjerenken et al., Phys. Rev. Lett. 111 100406 (2013)

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