TY  - JOUR
AU  - Mehl, Sebastian
AU  - Bluhm, Hendrik
AU  - DiVincenzo, David
TI  - Fault-tolerant quantum computation for singlet-triplet qubits with leakage errors
JO  - Physical review / B
VL  - 91
IS  - 8
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2015-01529
SP  - 085419
PY  - 2015
AB  - We describe and analyze leakage errors of singlet-triplet qubits. Even though leakage errors are a natural problem for spin qubits encoded using quantum dot arrays, they have obtained little attention in previous studies. We describe the realization of leakage correction protocols that can be implemented together with the quantum error correction protocol of the surface code. Furthermore we construct explicit leakage reduction units that need, in the ideal setup, as few as three manipulation steps. Our study shows that leakage errors can be corrected without the need of measurements and at the cost of only a few additional ancilla qubits and gate operations compared to standard quantum error correction codes.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000349786400008
DO  - DOI:10.1103/PhysRevB.91.085419
UR  - https://juser.fz-juelich.de/record/188051
ER  -