Two-body physics in the Su-Schrieffer-Heeger model
| Autor: | Alessio Recati, C. Menotti, M. Di Liberto, Iacopo Carusotto |
|---|---|
| Jazyk: | francouzština |
| Rok vydání: | 2016 |
| Předmět: |
Physics
education.field_of_study Condensed Matter - Mesoscale and Nanoscale Physics Continuum (measurement) Scattering Physique Population FOS: Physical sciences Quantum simulator 01 natural sciences 010305 fluids & plasmas Bloch oscillation optical lattice energy- bands quantum states phase Quantum Gases (cond-mat.quant-gas) Quantum mechanics Lattice (order) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Bound state Boundary value problem Condensed Matter - Quantum Gases 010306 general physics education Boson |
| Zdroj: | Physical Review A, 94 Physical review. A (Online) 94 (2016): 062704–062704. doi:10.1103/PhysRevA.94.062704 info:cnr-pdr/source/autori:Di Liberto, M.; Recati, A.; Carusotto, I.; Menotti, C./titolo:Two-body physics in the Su-Schrieffer-Heeger model/doi:10.1103%2FPhysRevA.94.062704/rivista:Physical review. A (Online)/anno:2016/pagina_da:062704/pagina_a:062704/intervallo_pagine:062704–062704/volume:94 |
| Popis: | We consider two interacting bosons in a dimerized Su-Schrieffer-Heeger (SSH) lattice. We identify a rich variety of two-body states. In particular, for open boundary conditions and moderate interactions, edge bound states (EBS) are present even for the dimerization that does not sustain single-particle edge states. Moreover, for large values of the interactions, we find a breaking of the standard bulk-boundary correspondence. Based on the mapping of two interacting particles in one dimension onto a single particle in two dimensions, we propose an experimentally realistic coupled optical fibers setup as quantum simulator of the two-body SSH model. This setup is able to highlight the localization properties of the states as well as the presence of a resonant scattering mechanism provided by a bound state that crosses the scattering continuum, revealing the closed-channel population in real time and real space. Comment: 14 pages; 14 figures |
| Databáze: | OpenAIRE |
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