Decay rates of N-electron resonant states in a double-barrier quantum dot under the influence of electric and magnetic fields

Resonant energies and decay rates of interacting electrons in a double-barrier quantum dot subjected to parallel electric and magnetic fields are investigated via a complex coordinate rotation method. We show that the decay rate increases monotonically with the electric field, but changes discontinuously with the magnetic field. The discontinuous jumps correspond to changes in the orbital angular momentum and spin.