Ramsey interference in quantum mesoscopic systems

TYPECondensed Matter Seminar
Speaker:Tal Goren
Location:Lidow Nathan Rosen (300)
We provide a method to probe dynamics in quantum mesoscopic systems which yields new results. Using Ramsey interference allows us to explore the time-dependence of dephasing effects of quasi-particles in a mesoscopic conductor. We investigated the dephasing effects of an ohmic environment on an electron-hole pair in a tunnel junction and found that the crossover between high and low impedance corresponds to the crossover between the ballistic and diffusive motion of a  quantum brownian particle.