Composite fermionization of 1-D Bose-Bose mixtures

Details Composite fermionization of 1-D Bose-Bose mixtures Composite fermionization of 1-D Bose-Bose mixtures

2008-05-06

arxiv.org/abs/0805.0738v1

Phys. Rev. A 78, 013629 (2008)

Physics

Condensed Matter

Other Condensed Matter

9 pages, 9 figures

Scientific paper

10.1103/PhysRevA.78.013629

We study the ground states of one-dimensional Bose-Bose mixtures under harmonic confinement. As we vary the inter-species coupling strength up to the limit of infinite repulsion, we observe a generalized, composite-fermionization crossover. The initially coexisting phases demix as a whole (for weak intra-species interactions) and separate on an atomic level (for strong intra-species repulsion). By symmetry, the two components end up with strongly overlapping profiles, albeit sensitive to symmetry-breaking perturbations. Different pathways emerge in case the two components have different atom numbers, different intra-species interactions, or different masses and/or trap frequencies.

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