School of Physics Hard Condensed Matter and AMO Seminar with Ian Spielman

Event Details

Host: Chandra Raman -

Coordinator: Alison Morain -


Summary Sentence: Guage Fields with Cold Atoms

Full Summary: Guage Fields with Cold Atoms

Here I present our experimental work synthesizing static gauge fields for ultracold neutral atoms (bosonic and fermionic alkali atoms).  I will discuss this gauge field in the language of spin-orbit coupling where it consists of an equal sum of Rashba and Dresselhaus couplings. In experiment, we couple two internal states of our alkali atoms with a pair of ``Raman'' lasers and load our degenerate quantum gas into the resulting adiabatic eigenstates.

For a Bose gas, a function of the Raman laser strength, a new exchange-driven interaction between the two dressed spins develops, which drives a (quantum) phase transition from a state where the two dressed spin states spatially mix, to one where they phase separate.   Going beyond this simple modification to the spin-dependent interaction, we show that in the limit of large laser intensity, the particles act as free atoms, but interact with contributions from higher even partial waves.

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Cold Atoms
  • Created By: Alison Morain
  • Workflow Status: Published
  • Created On: Aug 20, 2012 - 6:29am
  • Last Updated: Oct 7, 2016 - 9:59pm