Coupling and Entangling of Quantum States in Quantum Dot Molecules
Top Cited Papers
- 19 January 2001
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 291 (5503) , 451-453
- https://doi.org/10.1126/science.291.5503.451
Abstract
We demonstrate coupling and entangling of quantum states in a pair of vertically aligned, self-assembled quantum dots by studying the emission of an interacting electron-hole pair (exciton) in a single dot molecule as a function of the separation between the dots. An interaction-induced energy splitting of the exciton is observed that exceeds 30 millielectron volts for a dot layer separation of 4 nanometers. The results are interpreted by mapping the tunneling of a particle in a double dot to the problem of a single spin. The electron-hole complex is shown to be equivalent to entangled states of two interacting spins.Keywords
This publication has 30 references indexed in Scilit:
- Determination of the size, shape, and composition of indium-flushed self-assembled quantum dots by transmission electron microscopyJournal of Applied Physics, 2000
- Single-electron tunnelling in two vertically coupled quantum dotsJournal of Physics: Condensed Matter, 1999
- Manipulating the energy levels of semiconductor quantum dotsPhysical Review B, 1999
- Coulomb-coupling in vertically aligned self-assembled InAs quantum dotsNanotechnology, 1999
- Formation of a Coherent Mode in a Double Quantum DotPhysical Review Letters, 1998
- Quantum Wires Formed from Coupled InAs/GaAs Strained Quantum DotsPhysical Review Letters, 1998
- Quantum computation with quantum dotsPhysical Review A, 1998
- Coupled quantum dots as quantum exclusive-OR gateSuperlattices and Microstructures, 1997
- Electronic structure and magneto-optics of self-assembled quantum dotsPhysical Review B, 1996
- Role of strain and growth conditions on the growth front profile of InxGa1−xAs on GaAs during the pseudomorphic growth regimeApplied Physics Letters, 1988