Interacting adiabatic quantum motor

Article

关键词: LUTTINGER-LIQUID;    TRANSPORT;    MOLECULE;    CONDUCTANCE;    PARTICLE;    SYSTEMS;    MODEL;    EDGE;   

DOI  :  10.1103/PhysRevB.97.195411

来源: SCIE

【 摘 要 】

We present a field-theoretic treatment of an adiabatic quantum motor. We explicitly discuss a motor called the Thouless motor which is based on a Thouless pump operating in reverse. When a sliding periodic potential is considered to be the motor degree of freedom, a bias voltage applied to the electron channel sets the motor in motion. We investigate a Thouless motor whose electron channel is modeled as a Luttinger liquid. Interactions increase the gap opened by the periodic potential. For an infinite Luttinger liquid the coupling-induced friction is enhanced by electron-electron interactions. When the Luttinger liquid is ultimately coupled to Fermi liquid reservoirs, the dissipation reduces to its value for a noninteracting electron system for a constant motor velocity. Our results can also be applied to a motor based on a nanomagnet coupled to a quantum spin Hall edge.

【 授权许可】

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