Controlled operations in a strongly correlated two-electron quantum ring
2009 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 79, no 11, 115318- p.Article in journal (Refereed) Published
We have analyzed the electronic spectrum and wave-function characteristics of a strongly correlated two-electron quantum ring with model parameters close to those observed in experiments. The analysis is based on an exact diagonalization of the Hamiltonian in a large B-spline basis. We propose a qubit pair for storing quantum information, where one component is stored in the total electron spin and one multivalued “quMbit” is represented by the total angular momentum. In this scheme the controlled-NOT quantum gate is demonstrated with near 100% fidelity for a realistic far-infrared electromagnetic pulse.
Place, publisher, year, edition, pages
American Physical Society , 2009. Vol. 79, no 11, 115318- p.
Quantum Rings, Quantum Dots, Electron structure, Electron correlation, Configuration Interaction, Quantum Computing, quantum gates, CNOT, Controlled operations, angular momentum, electron spin, quantum entanglement, strongly correlated electron systems, wave functions
Atom and Molecular Physics and Optics Other Physics Topics Condensed Matter Physics Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:su:diva-32133DOI: 10.1103/PhysRevB.79.115318ISI: 000264768900100OAI: oai:DiVA.org:su-32133DiVA: diva2:279548