Interplay between exchange interaction and magnetic field gradient in a double quantum dot with two individual electron spin qubits
Abstract
We studied experimentally the coherent exchange interaction between two antiparallel electron spins in a double quantum dot with an increasing magnetic field gradient between the two dots. We observed an increase of the oscillation frequency and a reduction of the oscillation contrast. Both observations are consistent with a simple model of two spins interacting via exchange interaction. The demonstrated control of the two-electron spin states is interesting to produce gates for individual spin qubits.
- Publication:
-
Physical Review B
- Pub Date:
- August 2014
- DOI:
- 10.1103/PhysRevB.90.075436
- Bibcode:
- 2014PhRvB..90g5436T
- Keywords:
-
- 73.63.Kv;
- 03.67.-a;
- 85.75.-d;
- Quantum dots;
- Quantum information;
- Magnetoelectronics;
- spintronics: devices exploiting spin polarized transport or integrated magnetic fields