Entangling two distinguishable quantum bright solitons via collisions

22nd International Laser Physics Workshop

Billam, Thomas P^1 ; Blackley, Caroline L^2 ; Gertjerenken, Bettina^3 ; Cornish, Simon L^4 ; Weiss, Christoph^4

Jack Dodd Center for Quantum Technology, Department of Physics, University of Otago, Dunedin 9016, New Zealand^1

Joint Quantum Centre (JQC) Durham-Newcastle, Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom^2

Institut für Physik, Carl von Ossietzky Universität, D-26111 Oldenburg, Germany^3

Joint Quantum Centre (JQC) Durham-Newcastle, Department of Physics, Durham University, Durham DH1 3LE, United Kingdom^4

关键词: Atomic species;    Bright solitons;    Centre of mass;    Effective potentials;    Feshbach resonances;    Hyperfine state;    Parameter regimes;    S-wave scattering lengths;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/497/1/012033/pdf
DOI  :  10.1088/1742-6596/497/1/012033

来源: IOP

【 摘 要 】

The generation of mesoscopic Bell states via collisions of distinguishable bright solitons has been suggested in Phys. Rev. Lett. 111, 100406 (2013). Here, we extend our former proposal to two hyperfine states of85Rb instead of two different atomic species, thus simplifying possible experimental realisations. A calculation of the s-wave scattering lengths for the hyperfine states (f,mf) (2, +2) and (3, +2) identifies parameter regimes suitable for the creation of Bell states with an advantageously broad Feshbach resonance. We show the generation of Bell states using the truncated Wigner method for the soliton's centre of mass and demonstrate the validity of this approach by a comparison to a mathematically rigorous effective potential treatment of the quantum many-particle problem.