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Q: Fachverband Quantenoptik und Photonik
Q 18: Quantum gases: Mixtures, spinor gases, disorder effects
Q 18.1: Talk
Monday, March 18, 2013, 16:30–16:45, E 001
Entangling two distinguishable matter-wave bright solitons via collisions — Bettina Gertjerenken1, Thomas Billam2, Caroline Blackley3, Ruth Le Sueur3, Lev Khaykovich4, Simon Cornish5, and •Christoph Weiss5 — 1Institut für Physik,Carl von Ossietzky Universität, D-26111 Oldenburg, Germany — 2Jack Dodd Center for Quantum Technology, Department of Physics, University of Otago, Dunedin 9016, New Zealand — 3Joint Quantum Centre (JQC) Durham–Newcastle, Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom — 4Department of Physics, Bar-Ilan University, Ramat-Gan, 52900 Israel — 5Joint Quantum Centre (JQC) Durham–Newcastle, Department of Physics, Durham University, Durham DH1 3LE, 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 which can reliably be distinguished from statistical mixtures. Calculation of the relevant s-wave scattering lengths reveals that such states could potentially be realized in quantum-degenerate mixtures of 85Rb and 133Cs. In addition to fully quantum simulations for two distinguishable dimers, 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 an effective potential treatment of the quantum many-particle problem.