TY  - JOUR
AU  - Mehl, Sebastian
AU  - DiVincenzo, David
TI  - Inverted singlet-triplet qubit coded on a two-electron double quantum dot
JO  - Physical review / B
VL  - 90
IS  - 19
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2014-06200
SP  - 195424
PY  - 2014
AB  - The sz=0 spin configuration of two electrons confined at a double quantum dot (DQD) encodes the singlet-triplet qubit (STQ). We introduce the inverted STQ (ISTQ) that emerges from the setup of two quantum dots (QDs) differing significantly in size and out-of-plane magnetic fields. The strongly confined QD has a two-electron singlet ground state, but the weakly confined QD has a two-electron triplet ground state in the sz=0 subspace. Spin-orbit interactions act nontrivially on the sz=0 subspace and provide universal control of the ISTQ together with electrostatic manipulations of the charge configuration. GaAs and InAs DQDs can be operated as ISTQs under realistic noise conditions
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000345465200005
DO  - DOI:10.1103/PhysRevB.90.195424
UR  - https://juser.fz-juelich.de/record/172757
ER  -