Phys. Rev. Lett. 89, 170403 (2002) [4 pages]Ground States of SU(2)-Symmetric Confined Bose Gas: Quantum Superposition of the Phase-Separated Classical CondensatesReceived 6 March 2002; published 8 October 2002 Conservation of the total isotopic spin S of a two-component Bose gas—such as 87Rb—has a dramatic impact on the structure of the ground state. In the case when S is much smaller than the total number of particles N, the condensation of each of the two components occurs into at least two single-particle modes. The quantum wave function of such a ground state is a quantum superposition of the phase separated classical condensates, the most “probable” state in the superposition corresponding to the classical ground state in the sector of given N and S. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.170403
DOI:
10.1103/PhysRevLett.89.170403
PACS:
03.75.Fi
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