Synthetic spin-orbit coupling for ultracold atoms

  • Event Date: 2017-11-06
  • AMO/QIS/CMT
  • Speaker: Prof. Gediminas Juzeliūnas (Institute of Theoretical Physics and Astronomy, Vilnius University, Lithuania)  /  Host: Prof. Chih-Sung Chuu (National Tsing Hua University)
    Place: Lecture Room A of NCTS, 4F, 3rd General Building, Nat'l Tsing Hua Univ.

 Currently there is a great deal of activities in studying the spin-orbit coupling (SOC) for ultracold atoms. One of the challenges is to experimentally produce a two-dimensional (2D) SOC of the Rashba type, as well as a 3D Weyl SOC for the center of mass motion of ultracold atoms [1]. In particular, it was proposed that the 2D and 3D SOC can be generated using a periodic sequence of magnetic gradient pulses [2]. We shall also discuss another way of creating the 2D SOC using ultracold atoms confined in a bilayer structure. An interplay between the inter-layer tunneling, intra-layer Raman coupling and intra-layer atom-atom interaction gives rise to an effective 2D SOC providing a diverse ground-state configurations for bilayer Bose-Einstein condensates (BEC) [3] and degenerate Fermi gases [4].

Ref:

1. N. Goldman, G. Juzeliūnas, P. Öhberg and I. B. Spielman, Rep. Prog. Phys. 77, 126401 (2014).

2. B. M. Anderson, I. B. Spielman, and G. Juzeliūnas, Phys. Rev. Lett. 111, 125301 (2013).

3. S.-W. Su, S.-C. Gou, Q. Sun, L. Wen, W.-M. Liu, A.-C. Ji, J. Ruseckas, and G. Juzeliūnas, Phys. Rev. A 93, 053630 (2016).

4. L.-L. Wang, Q. Sun, W.-M. Liu, G. Juzeliūnas and A.-C. Ji, Phys. Rev. A 95, 053628 (2017).

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