Floquet scattering theory for current and heat noise in large amplitude adiabatic pumps

[摘要] We discuss the statistical correlation properties of currents and energy flows generated by an adiabatic quantum pump. Our approach emphasizes the important role of quantized energy exchange between the sea of electrons and the oscillating scatterer. The frequency omega of oscillations introduces a natural energy scale homega. In the low-temperature limit k(B)Thomega the pump produces a thermal-like noise due to ac currents generated by the pump. We predict that with increasing temperature the frequency dependence of the noise changes. The current noise is linear in omega at low temperatures, is quadratic at intermediate temperatures, and is linear again at high temperatures. Similarly, in the same temperature regions, the heat flow noise is proportional to omega(3), omega(2), and omega.

[发布日期] 2004-12-01

[关键词] RESONANT TRANSMISSION;TRAVERSAL TIME;QUANTUM;TRANSPORT;STATISTICS;CONDUCTORS;DRIVEN