Berlin 2014 – scientific programme
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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
Tuesday, March 18, 2014, 16:30–18:30, Spree-Palais
Generating Mesoscopic Bell States via Collisions of Distinguishable Quantum Bright Solitons — Bettina Gertjerenken1, Thomas Billam2, Caroline Blackley3, Ruth Le Sueur3, Lev Khaykovich4, Simon Cornish5, and •Christoph Weiss5 — 1Carl 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)