Phys. Rev. Lett. 85, 5488–5491 (2000)Implications of SU(2) Symmetry on the Dynamics of Population Difference in the Two-Component Atomic VaporReceived 17 August 2000; published in the issue dated 25 December 2000 We present an exact many-body solution for the dynamics of the population difference N2-N1 induced by an rf field in the two-component atomic cloud characterized by equal scattering lengths. We show that no intrinsic decoherence occurs for N2-N1, provided that the exact intrinsic SU(2) symmetry holds. Decoherence for N2-N1 arises when deviations from the symmetry exist either in the scattering lengths or in the confining potentials. We suggest testing the evolution of N2-N1 by conducting echo-type experiments. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.5488
DOI:
10.1103/PhysRevLett.85.5488
PACS:
03.75.Fi, 05.30.Jp
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