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Rotonlike Instability and Pattern Formation in Spinor Bose-Einstein Condensates

Matuszewski, Michal


We show that metastable phases of an antiferromagnetic spin-1 condensate in a simple model with pure contact interactions can exhibit a rotonlike minimum in the excitation spectrum. The introduction of a magnetic field gives rise to the instability of roton modes, which can lead to spontaneous emergence of regular periodic, polygonal, polyhedral, or crystalline patterns, as shown in numerical simulations within the truncated Wigner approximation. An explanation of the occurrence of rotonlike...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.105.020405


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