Interplay between Zeeman Coupling and Swap Action in Spin-Based Quantum Computer Models: Error Correction in Inhomogeneous Magnetic Fields
Abstract
We consider theoretically the interplay between Zeeman coupling and exchange-induced swap action in spin-based quantum dot quantum computer models in the presence of inhomogeneous magnetic fields, which are invariably present in real systems. We estimate quantitatively swap errors caused by the inhomogeneous field, establishing that error correction would, in principle, be possible in the presence of nonuniform magnetic fields in realistic structures.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2001
- DOI:
- 10.1103/PhysRevLett.86.918
- arXiv:
- arXiv:cond-mat/0004459
- Bibcode:
- 2001PhRvL..86..918H
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Quantum Physics
- E-Print:
- Revised version. To appear in Phys. Rev. Lett