Quantum Sciences Seminar - Xuedong Hu, University of Buffalo - Optimizing Electron-spin-cavity coupling via a double quantum dot
We investigate how to couple an electron spin in a semiconductor double
quantum dot to a microwave cavity via the electrically driven spin
resonance technique. Spin degree of freedom is accessed here through
either the spin-orbit interaction or an inhomogeneous magnetic field.
We derive the effective spin-photon coupling Hamiltonian, and assess the
coupling strength from the cavity and quantum dot parameters. We also
calculate the spin relaxation rate in the regime when spin-photon coupling
is strong. We show that a tunnel coupled double dot with a single
confined electron presents an intriguing system to reach the strong
coupling limit between the electron spin and the cavity photons, and
identify Si as a good candidate material for this purpose.
We thank support by NSA/LPS through ARO.
Location: Joseph Henry Room
Date/Time: 03/29/12 at 2:00 pm - 03/29/12 at 3:30 pm
Category: Quantum Sciences Seminar Series
Department: Physics