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Engineering Rashba-Dresselhaus Spin-Orbit Coupling for Cold Atoms using a Double Tripod Setup



Ian B. Spielman, Gediminas Juzeliunas, Julius Ruseckas, Daniel Campbell


We study the center of mass of motion of cold atoms affected by laser beams. The beams couple three atomic internal states to another two states to form a double tripod scheme. By properly choosing the amplitudes and phases of the laser fields the atom-light Hamiltonian contains a pair of degenerate eigenstates. They have the lowest energy and are separated from the remaining eigenstates by a gap determined by the Rabi frequencies of the atom-light coupling. Adiabatically eliminating the excited states, the resulting Hamiltonian of the remaining two internal states in- cludes either Rashba or Dresselhaus spin-orbit (SO) coupling. Unlike earlier proposals, here the SO coupled states are the two lowest energy “dressed” spin states and are thus immune to collisional relaxation. Finally, we discuss a specific implementation of our system using Raman transitions be- tween different hyperfine states within the electronic ground state manifold of nuclear spin I = 3/2 alkali atoms.
SPIE Conference Proceedings


Bose Einstein Condensate, quantum phase transitions


Spielman, I. , Juzeliunas, G. , Ruseckas, J. and Campbell, D. (2011), Engineering Rashba-Dresselhaus Spin-Orbit Coupling for Cold Atoms using a Double Tripod Setup, SPIE Conference Proceedings (Accessed July 14, 2024)


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Created January 1, 2011, Updated February 19, 2017