Quantized pumping and topology of the phase diagram for a system of interacting bosons

Erez Berg, Michael Levin, Ehud Altman

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Interacting lattice bosons at integer filling can support two distinct insulating phases, which are separated by a critical point: the Mott insulator and the Haldane insulator. The critical point can be gapped out by breaking lattice inversion symmetry. Here, we show that encircling this critical point adiabatically pumps one boson across the system. When multiple chains are coupled, the two insulating phases are no longer sharply distinct, but the pumping property survives. This leads to strict constraints on the topology of the phase diagram of systems of quasi-one-dimensional interacting bosons.

Original languageEnglish
Article number110405
JournalPhysical Review Letters
Volume106
Issue number11
DOIs
StatePublished - 17 Mar 2011
Externally publishedYes

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