Finite-size corrections to quantized particle transport in topological charge pumps
Li R, Fleischhauer M (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 96
Article Number: 085444
Journal Issue: 8
DOI: 10.1103/PhysRevB.96.085444
Abstract
We investigate the quantization of adiabatic charge transport in the insulating ground state of finite systems. Topological charge pumps are used in experiments as an indicator of topological order. In the thermodynamic limit, the transport can be related to a topological Berry phase and is thus strictly quantized. This is no longer true for finite systems. We derive finite-size corrections to the transport for both noninteracting and interacting systems and relate them to analytic properties of the single- and many-body Berry curvature. We find that they depend on the details of experimental realizations of the pumps. While they can be non-negligible even in large systems, a proper choice of the pumping protocol can suppress these corrections.
Involved external institutions
Germany (DE)How to cite
APA:
Li, R., & Fleischhauer, M. (2017). Finite-size corrections to quantized particle transport in topological charge pumps. Physical Review B, 96(8). https://dx.doi.org/10.1103/PhysRevB.96.085444
MLA:
Li, Rui, and Michael Fleischhauer. "Finite-size corrections to quantized particle transport in topological charge pumps." Physical Review B 96.8 (2017).
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