Tuning the quantum tunneling and quantum information properties among the trion states in coupled quantum dots

Abstract

Quantum transition and information properties of the Coulomb coupled trion (electron-electron-hole) in the double quantum dots under the influence of the time-dependent electric field have been studied. Tuning the Hubbard interaction strength amongst the states of electron-hole complexes and the parameters of the ac field, two strikingly different kinds of approximate qubit can be constructed within the eight trion states. The similarity and difference between the electron dynamic entanglement and overlapping of the wavefunction with the Bell state have been elucidated through analyzing these two kinds of qubit.

10 figures, 16pages

References in corpus (4)

• Optical Read-Out and Initialization of an Electron Spin in a Single Quantum Dot
• Theory of fast optical spin rotation in a quantum dot based on geometric phases and trapped states
• Limitation of entanglement due to spatial qubit separation
• Coherent control of interacting electrons in quantum dots via navigation in the energy spectrum