.png){kind=icon}
.png){kind=icon}
Return
Optimizing frequency allocation for superconducting quantum processors with frequency-tunable qubits
.png){kind=icon}
PRE
AI
DOI：10.1007/s11433-024-2527-3.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
As superconducting quantum processors scale, a key challenge is maintaining high coherence times and fidelity control over numerous qubits. We propose an automatic frequency allocation method for frequency-tunable qubits that equally considers coherence-limited fidelity and crosstalk-induced control errors during the allocation process. By employing a weighted average of the objective functions for coherence time and crosstalk, we numerically calculate gate fidelity to establish an open-loop optimization for determining suitable weight factors. This results in an efficient objective function for frequency optimization. We apply our method to frequency-tunable transmon qubits with tunable couplers, both theoretically and experimentally. The numerical results demonstrate significant advantages, including substantial reductions in gate errors and faster operation times, especially at higher qubit counts. Experimentally, our approach successfully achieves approximately 99.9% single-qubit fidelity on a nine-qubit chip.
Keywords:
frequency allocation
transmon qubits
superconducting processors
Journal
S
IF:
7.5
Papers:
3.9K
Citations:
7.4K