Crosstalk and Coherence Analysis for Superconducting Quantum Processors
Title: Crosstalk and Coherence Analysis for Superconducting Quantum Processors
DNr: NAISS 2023/23-209
Project Type: NAISS Small Storage
Principal Investigator: Sandoko Kosen <>
Affiliation: Chalmers tekniska högskola
Duration: 2023-03-30 – 2023-10-01
Classification: 10304


The worldwide development of quantum computers based on superconducting circuits has gone beyond the 100-qubits milestone recently. At Wallenberg Center for Quantum Technology (Chalmers), we are developing our own quantum processors in house, with a state-of-the-art few tens of qubits currently operational in our measurement facilities at Chalmers. To further improve the performance of the quantum processors, we're working on understanding the signal crosstalk and qubit coherence properties in large chips. In particular, we employ commercial electromagnetic solvers like ANSYS electronic desktop and COMSOL to simulate these parameters. The combination of very small design features (few micrometers in size) and a large chip area (few millimeters) has made it extremely difficult to run the simulations on office workstations that we have. We have several types of problem that will benefit from large RAM capacity and occasionally more number of cores. The resources allowed by this small compute project proposal will allow us to achieve our goal towards understanding limits of our processor design, which will in turn enables us to contribute to the burgeoning quantum hardware engineering discipline worldwide.