TY  - JOUR
AU  - Willsch, D.
AU  - Nocon, M.
AU  - Jin, F.
AU  - De Raedt, H.
AU  - Michielsen, K.
TI  - Gate-error analysis in simulations of quantum computers with transmon qubits
JO  - Physical review / A
VL  - 96
IS  - 6
SN  - 2469-9926
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2017-07939
SP  - 062302
PY  - 2017
AB  - In the model of gate-based quantum computation, the qubits are controlled by a sequence of quantum gates. In superconducting qubit systems, these gates can be implemented by voltage pulses. The success of implementing a particular gate can be expressed by various metrics such as the average gate fidelity, the diamond distance, and the unitarity. We analyze these metrics of gate pulses for a system of two superconducting transmon qubits coupled by a resonator, a system inspired by the architecture of the IBM Quantum Experience. The metrics are obtained by numerical solution of the time-dependent Schrödinger equation of the transmon system. We find that the metrics reflect systematic errors that are most pronounced for echoed cross-resonance gates, but that none of the studied metrics can reliably predict the performance of a gate when used repeatedly in a quantum algorithm.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000416845600004
DO  - DOI:10.1103/PhysRevA.96.062302
UR  - https://juser.fz-juelich.de/record/840407
ER  -