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Quantized Pumping and Topology of the Phase Diagram for a System of Interacting Bosons
2011
Physical Review Letters
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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[Phys. Rev. Lett. 97, 260401 (2006)]. 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
doi:10.1103/physrevlett.106.110405
pmid:21469847
fatcat:zeeqc4t3xjfvfbzqp7s5dahxzi