University of Arkansas, Fayetteville


As the size and proximity of components on modern computer chips approaches quantum mechanical limits, various novel solutions have been proposed to ensure further increases in processing speed and reliability. Of these, small semiconductor devices called quantum dots may constitute the logic gates of future quantum computers - processors taking advantage of phenomena such as entanglement and quantum teleportation to enable ultra-fast computation speeds. Quantum dots behave much like designer atoms in that their absorption/emission energies can be adjusted lo desired values. A quantum mechanical model of semiconductor quantum dots having equal size and interacting with a single-mode electric field tuned to some fraction of the transition frequency has been developed Due to the similarities between two-level atoms and quantum dots, techniques common in quantum optics have been employed to describe the time evolution of the resulting exciton-field system. it is assumed that the quantum dots are initially prepared in a Bell entangled state and that the field is in a coherent state. Collapse and revivals in the entanglement are found when the mean photon number of the coherent state is very large.