We provide scalable, flexible, low-loss cryogenic interconnect for quantum computing. PWG Quantum develops cryogenic cable and interconnect platforms built for superconducting qubit control, cryogenic RF and microwave links, test and measurement, and advanced instrumentation — engineered so signal integrity holds up as systems scale from single racks to full quantum computing installations.
Standard semi-rigid coax and most commercial cryogenic cable are optimized for a single parameter — usually insertion loss or cost — and treated as a passive, off-the-shelf link.
PWG designs cryogenic interconnect as a coupled thermal, RF, and mechanical system from the start. That means flexibility, low loss, and scalable channel density are engineered together, rather than traded off against each other as your system grows from a single cryostat to a multi-rack installation.
Three cryogenic interconnect platforms, spanning current production hardware through next-generation research programs. All platforms are configurable to your system's termination, length, and shielding requirements.
Initial production focus is frequencies up to 12 GHz. Higher-frequency configurations (up to 50+ GHz) are available as custom engineering, particularly for the P-Series and X-Series platforms.
Our current production cryogenic cable platform, built for teams running superconducting qubit control and cryogenic measurement systems today. Selected for consistent lead times and proven field performance across research and commercial deployments.
An advanced-performance cryogenic cable platform under active development, aimed at higher channel densities and more demanding signal environments as customer systems scale. Early-access engagements are available for qualified programs.
A proprietary, next-generation cryogenic interconnect platform in research and development, targeting the connectivity requirements of future large-scale quantum computing architectures. Details are shared under NDA with strategic partners.
PWG interconnect platforms are deployed anywhere a signal has to survive the trip between room temperature electronics and a cryogenic stage without losing integrity.
Interconnect for control and readout lines running between processor and electronics.
Reliable signal paths for characterization and validation at cryogenic temperatures.
Stable, low-loss RF and microwave connectivity across cryostat temperature stages.
Infrastructure that scales alongside growing qubit counts and system complexity.
Precision cabling for sensing and instrumentation platforms operating at low temperature.
Cryogenic interconnect is often engineered one parameter at a time. In a real cryostat, RF performance, thermal load, mechanical behavior, and channel density are coupled — improving one in isolation usually costs you another.
Insertion and return loss, phase and group delay, dispersion, and impedance uniformity across the full cable run.
Thermal load between stages and a thermalization architecture that keeps each cryostat stage at its intended temperature.
Flexibility and bend tolerance, stability through repeated thermal cycling, and low triboelectric and microphonic noise.
Cable and connector geometry that scales to the channel counts real multi-qubit systems require, without crowding a cryostat stage.
We also qualify platforms for magnetic compatibility (Non-Magnetic option) where a system's sensitivity to stray magnetic fields rules out standard hardware. The specific materials and internal construction behind each platform remain proprietary; what we share publicly is how each product performs and integrates into your system.
Our name points to a research direction beyond the interconnect product line: engineered phonon transport for cryogenic thermal isolation, an approach we are pursuing under patent. It is a separate, longer-horizon research effort from the cable platforms described on this page.
Characterization is in progress on production hardware. Curves and figures below will be published as validated measurements become available — we don't publish estimated numbers as measured results.
300 K vs. 4 K, 0.047″ C1, 300 mm, 0.1–20 GHz.
Reflection performance across the operating frequency band.
Thermal conductance between cryostat stages.
Phase stability and group delay across the operating frequency band.
Additional characterization — bend stability, repeated thermal-cycling endurance, and channel-to-channel variation — is planned alongside these measurements.
PWG exists to remove the physical infrastructure constraints that limit how far superconducting quantum systems can scale — so the scientific, materials, simulation, and medical breakthroughs those systems make possible can arrive sooner.
We're building a dedicated customer portal so you can manage your account and hardware in one place. Once live, it will provide:
Existing customers can reach support directly at info@PWGquantum.com.
Whether you're specifying interconnect for a new cryostat build or evaluating a redesign, our team can help you configure the right platform.
Get pricing for a standard or custom configuration.
Work with our team on lengths, terminations, and options.
Evaluate PWG hardware in your own system.
Ask our engineering team a specific technical question.
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