AC transport with reservoirs of finite width

AC transport with reservoirs of finite width

The linear response conductance coefficients are calculated in the scattering approach at finite frequency, damping and magnetic field for a microstructure in which the reservoirs are modeled as quantum wire leads of infinite length but finite width. Independently of frequency, inelastic scattering causes subbands with large group velocity to contribute more strongly to the conductance than cha...

1 O ct 1 99 7 AC transport with reservoirs of finite width

The linear response conductance coefficients are calculated in the scattering approach at finite frequency, damping and magnetic field for a microstructure in which the reservoirs are modeled as quantum wire leads of infinite length but finite width. Independently of frequency, inelastic scattering causes sub-bands with large group velocity to contribute more strongly to the conduc-tance than c...

Transport through a finite Hubbard chain connected to reservoirs

The dc conductance, gN , through a finite Hubbard chain of size N (= 1, 2, 3, . . .) connected to reservoirs is studied at T = 0 in an electron-hole symmetric case. We calculate a spatial dependence of the self energy analytically at ω = 0 within the second order in U , and obtain an inter-site Green’s function GN1, from which gN can be determined, via the Dyson equation. The results depend str...

An analysis of electromagnetic scattering from finite-width strips

Full Software AC Servo Controllers with Dynamic Pulse Width Modulation

Full software AC servo controllers have been developed with special real time software in the Windows NT operating system. The full software AC servo controllers are able to control multiple AC servomotors with the CPU of a personal computer. The controller handles 1 00s commutation and current feedback, 200s velocity feedback, and 1 ms position feedback. The full software AC servo controllers ...