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"My laboratory studies brain activity...we were impressed by its superb performance, at least ten times better than the tables we were using...much less headaches…"
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Newsletter May 2026 | Menu of Newsletters

Improving Vibration Decoupling in Dilution Refrigeration for Quantum Computing



Superconducting qubits, which are used in quantum computers, are extremely sensitive to external influence. They need to be cooled to milli-Kelvin temperatures to maintain their quantum state and prevent decoherence, which is the loss of quantum information.

Dilution refrigerators are the most widely used technology for achieving these ultra-low temperatures. They are essential for quantum computing because they cool superconducting qubits to near absolute zero (0 Kelvin or -273.15°C). Dilution refrigerators achieve such low temperatures by using a mixture of helium-3 and helium-4, which undergoes phase separation at very low temperatures, thereby absorbing heat and effectively cooling the system to the desired temperature.

By providing a stable, low-temperature environment, dilution refrigerators allow quantum computers to perform complex calculations without being disrupted by thermal noise.

Vibration Decoupling
Dilution refrigerators, while providing the necessary cooling, can introduce vibrations due to their internal components like pulse tubes, compressors, and pumps. Vibrations can also be introduced by external environmental sources from building HVAC systems, elevators, doors opening and closing, footfall near the equipment, and outside traffic and construction.

hese vibrations can interfere with the delicate quantum states of qubits, leading to errors and reduced computational accuracy. A vibration decoupling system for stability is, therefore, a critical requirement for dilution refrigerators to realize successful development and deployment of quantum computers.

Various methods are used with dilution refrigerators to decouple vibrations. These include:

1. ous methods are used with dilution refrigerators to decouple vibrations. These include: flexible bellows that divert vibrations away from the refrigerator structure.
2. cryogenic spring pendulums to isolate pulse tube vibrations.
3.braided copper straps for thermalization.
4. vibration isolation platforms utilizing technologies like active piezoelectric vibration cancellation to reduce floor vibrations that can be transmitted to the refrigerator.

Of particular concern to quantum researchers is low-frequency vibration near the pulse tube excitation frequency. The vibration isolation solutions listed here do not adequately cancel out frequencies down to 0.5 Hz vertically and horizontally. Vibration decoupling to this level would be considered an optimum performance objective for quantum computing within dilution refrigeration.

Only one vibration isolation platform is capable of providing vibration decoupling to 0.5 Hz, that is Negative-Stiffness vibration isolation.


Full article...

Winners 2025-2026 Educational Isolator Giveaway


Congratulations 2025-2026 Winners: Minus K Technology's Vibration Isolator
Educational Giveaway U.S. Colleges and Universities

“Giving back to academia always gives us a great feeling. When talking to students and professors, there is high interest in getting isolation systems for their schools to help with experiments. We are proud of being able to provide systems to schools for ten years now."
- Steve Varma, Minus K President

Winning Proposals for Vibration Isolation Research Projects:

University of North Texas - Physics Department
The vibration isolator will be used for experiments identifying and assembling stacked two-dimensional heterostructures for quantum transport and scanning tunneling microscopy studies.

University of Pittsburgh - Physics and Astronomy Department
The vibration isolator will be used for experiments with their quantum twisting microscope inside an acoustical chamber.

Northwestern University - Electrical and Computer Engineering Department
The isolator will be used with a diamagnetically levitated optical cavity experiment to develop an ultra-high-Q mechanical oscillator without clamping losses.

University of Illinois Urbana-Champaign - Physics Department
The isolator will used to support a Fully Motorized 2D Transfer System in an MBraun glovebox used to fabricate van der Waals (vdW) heterostructures, by stacking atomically thin layerssuch as Graphene, hBN, and TMDsto create specific moiré superlattices.

Illinois Wesleyan University - Physics Department
The isolator will be for experiments with Spin noise measurements in GaAs quasi-1D semiconductor mesowires or measurements of thermal conduction of MX3 mesowires with a Michelson interferometer.

Northwestern University - Applied Physics Department
The isolator will assist in experiments by supporting a precision laser frequency stabilization setup based on the PoundDreverHall (PDH) locking technique.

Next Giveaway to be Announced August 2026 l Stay tuned to these newsletters.
Questions can be addressed to giveaway@minusk.com


Previous Educational Giveaway Winners>>>

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Minus K Technology Inc., Vibration Isolation Systems
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