English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Topological quantum pumps are topologically equivalent to the quantum Hallstate: In these systems, the charge pumped during each pumping cycle isquantized and coincides with the Chern invariant. However, differently fromquantum Hall insulators, quantum pumps can exhibit novel phenomena such as thefractional quantization of the charge transport, as a consequence of theirdistinctive symmetries in parameter space. Here, we report the analogousfractional quantization of the spin transport in a topological spin pumprealized in a one-dimensional lattice via a periodically modulated Zeemanfield. In the proposed model, which is a spinfull generalization of theHarper-Hofstadter model, the amount of spin current pumped during well-definedfractions of the pumping cycle is quantized as fractions of the spin Chernnumber. This fractional quantization of spin is topological, and is a directconsequence of the additional symmetries ensuing from the commensuration of theperiodic field with the underlying lattice.

Fractional quantization of charge and spin in topological quantum pumps