Scientific paper: Thermal benchmarking of Cri/oFlex? for superconducting Quantum Computing

One of the Arts in quantum computing is how to provide i/o - a datalink- to the #QPU without opening noise and loss channels. Thermal noise is one of those channels that can reach your quantum processor, if your input lines are not carefully thermalized.

In this paper, preprint: https://arxiv.org/abs/2410.01053, scientists of Karlsruher Institut für Technologie (KIT) , lead by prof. Ioan Pop and prof. Wolfgang Wernsdorfer in collaboration with Delft Circuits , carefully compared the thermal properties of very carefully thermalized coaxial microwave drivelines with Cri/oFlex? by measuring the thermal population in a microwave resonator using a superconducting qubit.

They find the thermalization of the on-flex attenuators comparable to or slightly better as its coaxial counter part, whilst the Cri/oFlex? thermalization speed is twice as fast at 0.28 ms. In the graph the resonator temperature of the coaxial setup is determined to be ~30 mK and the flex line at ~26 mK.

This research, together with earlier results by Bluefors and VTT with Delft Circuits - https://arxiv.org/abs/2405.09211- showing the equivalence in qubit coherence times in comparing Cri/oFlex? with coaxial solutions, paves the way for the order of magnitude increase in channel capacity that Cri/oFlex? offers for quantum computers.

The kQbit era has begun. Do you want to power your i/o with the ultra-scalable and cutting edge Cri/oFlex? too? Check out our products at https://delft-circuits.com/product-overview/products-cryogenic-cable/.

The research was conducted in an EU funded FET-open project AVaQus lead by Pol Forn-Díaz (FET-Open AVaQus GA 899561).

The authors of the paper are: Patrick Paluch Martin Spiecker Nicolas Gosling Viktor Adam Jakob Kammhuber Kiefer Vermeulen Dani?l Bouman Wolfgang Wernsdorfer prof. Ioan Pop.

Sander Arts Brenda Rovers Daan Kuitenbrouwer