Topological charge pumping of bound bosonic pairs

Abstract

Experiments with bosonic atoms in optical superlattices allow for the interesting possibility to study the adiabatic quantized pumping of bosonic atoms in the presence of interactions. We investigate this exotic phenomenon for bound bosonic pairs in the paradigmatic Su-Schrieffer-Heeger model where the ground state exhibits topological phase transitions due to dimerized hoppings. At unit filling we show that there exist crossovers and phase transitions to bond-order phases of paired bosons known as pair-bond-order phase as a function of attractive interactions. The pair bond order phase is found to exhibit effective topological properties such as the presence of polarized paired edge states. This is further analyzed by studying the emergence and breakdown of the Thouless charge pumping of this bound bosonic pairs by a parametric extension to the famous Rice-Mele model. Finally we discuss how the pumping of paired bosons or different regimes of breakdown of charge pumping can be probed by state-of-the art experiments with repulsively bound bosons.

arXiv comment10+ pages including supplementary materials. arXiv admin note: text overlap with arXiv:1812.07880

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• Effect of disorder on topological charge pumping in the Rice-Mele model
• Splitting of topological charge pumping in an interacting two-component fermionic Rice-Mele Hubbard model
• Interaction Induced Topological Charge Pump
• Arbitrary entangled state transfer via a topological qubit chain
• Interactions enable Thouless pumping in a nonsliding lattice
• Topological inheritance in half-SSH Hubbard models
• Realizing a symmetry protected topological phase through dimerized interactions
• Stabilization of Hubbard-Thouless pumps through nonlocal fermionic repulsion
• Nonlinear Thouless Pumping of Solitons Across an Impurity
• Phonon-induced breakdown of Thouless pumping in the Rice-Mele-Holstein model
• Transport of Vector Solitons in Spin-Dependent Nonlinear Thouless Pumps
• Topological pump and bulk-edge-correspondence in an extended Bose-Hubbard model
• Plateau transitions of spin pump and bulk-edge correspondence
• Anomalous pumping in the non-Hermitian Rice-Mele model
• Quantized Thouless pumps protected by interactions in dimerized Rydberg tweezer arrays
• Interaction driven topological phase transitions of hardcore bosons on a two-leg ladder
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• Anomalous bulk-edge correspondence of nonlinear Rice-Mele model
• Topological pump of $SU(Q)$ quantum chain and Diophantine equation
• Topologically protected quantized changes of the distance between atoms
• Absence of disordered Thouless pumps at finite frequency
• Topological phases of bosons with local parity coupling on a dimerized lattice