Bluefors & QDevil Partner on High-Performance Cryogenic QFilters

QDevil’s QFilter


This month, Bluefors —  a Finnish manufacturer of dilution refrigerators, and QDevil, a manufacturer of electronics and devices for quantum electronics experiments based in Denmark —  entered into an agreement that allows QDevil’s high-performance cryogenic QFilters to be pre-installed at the factory in Bluefors’ state of the art dilution refrigerators.

“We are excited to announce our collaboration with Bluefors,” said the CEO of QDevil Jonatan Kutchinsky. “Together with Bluefors, being a major player within the dilution refrigerator business, the customers will experience a higher degree of product integration and enhanced performance thus further accelerating research within quantum electronics.”

The QFilter — based on research at Harvard University and the University of Copenhagen — is a multistage 24 channel low pass filter attenuating from 65 kHz, with the added benefit of superb thermalization of electrons below 100 mK.

Built to be easily mounted on the mixing chamber plate in dilution refrigerators while being presented in a flexible design, making it possible to stack or piggy tail multiple filters for higher channel counts. Compatible with high magnetic field environments, this means the QFilter can be placed close to the superconducting magnet in a dilution refrigerator. The signal lines are thermally anchored to non-magnetic gold-plated copper brackets and are interfaced with non-magnetic shielded 25-pin microD connectors.


In addition, QDevil has recently published an application note that describes in some detail how a low electron temperature has been achieved in a real-life experiment performed at the Center for Quantum Devices at the Niels Bohr Institute — the University of Copenhagen, Denmark using QFilter.

About QDevil

QDevil was founded in Copenhagen, Denmark, in 2016 by two physicists, Jonatan Kutchinsky and Ferdinand Kuemmeth. The mission is to accelerate research and development in quantum electronics labs. The company employees 20 people, mostly physicists and engineers, and is situated in Copenhagen, Denmark.

About Bluefors

Bluefors Oy (formerly BlueFors Cryogenics) specializes in cryogen-free, ultra-low temperature dilution refrigerator systems aiming to supply the highest possible quality products. We deliver systems for cutting-edge research fields such as quantum computing and nanotechnology.

Bluefors technology was developed at the world-famous Low-Temperature Laboratory (LTL) at Helsinki University of Technology (now Aalto University). In 2007 the first cryogen-free dilution refrigerator was taken into use by the NANO-group of the LTL, shortly after Bluefors Oy was established as a company. With over 600 systems installed worldwide, we are the leading supplier of cryogen-free dilution refrigerator systems.

James Dargan
James Dargan
James Dargan is a contributor at The Quantum Daily. His focus is on the QC startup ecosystem and he writes articles on the space that have a tone accessible to the average reader

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