Coherent dynamics of coupled electron and hole spins in semiconductors

Authors
Hagele, D Hubner, J Ruhle, WW Oestreich, M
Citation
D. Hagele et al., Coherent dynamics of coupled electron and hole spins in semiconductors, SOL ST COMM, 120(2-3), 2001, pp. 73-78
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
120
Issue
2-3
Year of publication
2001
Pages
73 - 78
Database
ISI
SICI code
0038-1098(2001)120:2-3<73:CDOCEA>2.0.ZU;2-F
Abstract
We observe the coherent dynamics of coupled electron and hole spins within 2D-excitons. The dynamics are induced by the exchange interaction of electr on and hole and by an external magnetic field tilted from the plane of a 3 nm GaAs/(AlGa)As quantum well. The observed quantum beats are well describe d by a Schrodinger equation for the pair of spins in a magnetic field which is solved analytically. The results lead to a controlled not (CNOT) gate, a key element in quantum computation, realized with semiconductor nanostruc tures. (C) 2001 Elsevier Science Ltd. All rights reserved.