Quantum Pump for Spin and Charge Transport in a Luttinger Liquid

2000/11/01 by Prashant Sharma, Claudio Chamon · 5 citations
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.87.096401

4 pages, 2eps figures included

arxiv created 2000/11/01 · openalex publication_date 2001/08/10 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study two different parametric pumps--one for pumping spin currents, the other for charge currents--in interacting quantum wires. We find that, as a function of pumping frequency, the spin or charge pumped per cycle has a nonuniversal crossover--depending on pumping details--between two universal fixed point values of 0 and twice the electronic spin or charge quantum number. The direction of flow between these two fixed points depends on whether the interactions are repulsive or attractive, while the quantization itself is a signature of interactions.

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• Zeeman ratchets: pure spin current generation in mesoscopic conductors with non-uniform magnetic fields