Projects / Programmes
Carbon nanotube based spin qubits
| Code |
Science |
Field |
Subfield |
| 1.02.00 |
Natural sciences and mathematics |
Physics |
|
| Code |
Science |
Field |
| P260 |
Natural sciences and mathematics |
Condensed matter: electronic structure, electrical, magnetic and optical properties, supraconductors, magnetic resonance, relaxation, spectroscopy |
Quantum information processing, nano-techology, new materials, carbon nanotubes, fullerenes.
Researchers (6)
Organisations (1)
| no. |
Code |
Research organisation |
City |
Registration number |
No. of publicationsNo. of publications |
| 1. |
0106 |
Jožef Stefan Institute |
Ljubljana |
5051606000 |
92,024 |
Abstract
We propose a research project devoted to modelling of quantum control of electron spins in new carbon nanomaterials. We will exploit quantum phenomena such as coherent superposition of quantum states, non-locality, and entanglement to create devices for tasks that would not be feasible using classical phenomena alone, but are essential ingredients for quantum information processing devices. Working alongside some of the theorists who have contributed to the development of these concepts, and together with other experimentalists (University of Oxford and QinetiQ, UK), the project will pursue a program of modelling the electrical detection of quantum entanglement and the transfer of quantum information along spin-chains and between one form and another on devices whose primary construction elements are carbon nanotubes and fullerenes.
Significance for science
The project has contributed in an important way to the understanding of the magnetic
properties of the smallest nanostructures for the storage and processing of quantum
information. We have namely explored the interplay of the magnetic anisotropy effects and the
coupling of the magnetic moment with the conduction-band electrons. Formerly, the majority of
theoretical models were derives assuming isotropy in the spin space, in spite of the fact that in
systems with strongly reduced symmetry (which is the case for single magnetic atoms on
surfaces of conducting materials and in the interior of nanostructures) the magnetic anisotropy
effects are very large. The results of our calculations are in good agreement with recent
measurements of magnetic properties of single atoms using tunneling microscopes, perfomed in the facilities of IBM Research, Almaden, USA. Better understanding of the magnetic anisotropty in single atoms sheds new light on the magnetism of nanostructures, which is of major importance for continued miniaturization of electronic devices; if the magnetic anisotropy would be increased for another order of magnitude, for example by exchange coupling between strongly anisotropic atoms, it would be conceivable to perform experiments at temperatures approaching the root temperature (today the experiments are performed in cryogenic environment).
Significance for the country
The results of the project are significant for the perception of Slovenia in the international
community, as they have established Slovenia's position among the countries with well
developed methods and procedures for studying some of the most demanding problems in the
field of spin physics in nanostructures.
Most important scientific results
Annual report
2008,
2009,
final report,
complete report on dLib.si
Most important socioeconomically and culturally relevant results
Annual report
2008,
2009,
final report,
complete report on dLib.si
