Special Colloquium
Department of Physics, NCU
Quantum Manipulation in Mesoscopic Systems
Speaker
Dr. SHUN-TSUNG LO(羅舜聰)
National Cheng Kung University
Date 2018.02.05 (Mon)
Time 11:00
Place S4-625
Abstract:
Coupling of electron spins to an electromagnetic field has long been tantalizing for fundamental research and targeted for various applications particularly in quantum bits. The quantum platform, which can host electron spins with controllable on-chip electromagnetic field, is thus advantageous for such investigations. In the beginning, I will briefly introduce my work on studying charge transport in different low-dimensional systems including semiconductors, superconducting films, and two-dimensional crystals. Later on, I will focus on the control of charge and spin dynamics in semiconductor nanostructures.
Previously, the inability to spatially separate electrons with up and down spins has limited the ability to track and use their individual spin dynamics. Here we demonstrate that the spatial spin splitting of a coherent beam of electrons can be realized using the interplay between an external magnetic field and spin-orbit interactions. Also, we study the correlation between two spatially separated spins in coupled quantum dot-wire systems and show the existence of bound spin states in a quantum wire. These findings pave a promising route to decorate electron spins with specific quantum information.