Two-body bound and edge states in the extended SSH Bose-Hubbard model

Volume: 226, Issue: 12, Pages: 2751 - 2762
Published: Jul 1, 2017
Abstract
We study the bosonic two-body problem in a Su-Schrieffer-Heeger dimerized chain with on-site and nearest-neighbor interactions. We find two classes of bound states. The first, similar to the one induced by on-site interactions, has its center of mass on the strong link, whereas the second, existing only thanks to nearest-neighbors interactions, is centered on the weak link. We identify energy crossings between these states and analyse them using...
Paper Details
Title
Two-body bound and edge states in the extended SSH Bose-Hubbard model
Published Date
Jul 1, 2017
Volume
226
Issue
12
Pages
2751 - 2762
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