Quantum Coax supplies high‑performance coaxial cable assemblies tailored for cryogenic quantum computing and low‑temperature physics environments. The cables are small, flexible, and engineered to minimize heat load while tolerating thermal contraction, enabling reliable connections inside vacuum cryostats.
Funding
Funding not disclosed
Founders
Product
Problem
Quantum computing hardware requires reliable electrical connections inside vacuum cryostats that operate at cryogenic temperatures, but conventional coaxial cables add excessive heat load, are bulky, and cannot tolerate the thermal contraction during cooldown, leading to signal loss and integration delays.
Solution
Quantum Coax provides turnkey coaxial cable assemblies specifically engineered for low‑temperature vacuum environments used in quantum computers and low‑temperature physics experiments. Customers specify the cable type, length, and connector, and receive a ready‑to‑install assembly that combines small, flexible form factors with materials chosen for low thermal conductivity and high electrical performance. The product line includes superconducting NbTi, phosphor‑bronze, and stainless‑steel conductors, each with PTFE dielectric and soldered connector terminations to ensure low‑loss, robust connections. By minimizing heat load and accommodating thermal contraction, these assemblies enable stable signal transmission and faster hardware integration for quantum hardware developers.
Target Audience
Primary customers are quantum computer manufacturers, research labs, and low‑temperature physics facilities that need high‑performance, cryogenic‑compatible interconnects for qubit control and readout.
Features
- Turnkey delivery of custom‑length coax assemblies with soldered SMA, SMP, SMPM, SSMA, 2.92 mm, MMCX, and non‑magnetic connector options
- Small 0.040 in outer‑diameter flexible cables designed for easy routing and ductility during thermal cycling
- Cryogenic‑optimized conductor materials: superconducting NbTi (zero resistance below 9.2 K), low‑loss phosphor bronze (non‑magnetic), and low‑thermal‑conductivity stainless steel
- PTFE dielectric for consistent impedance (50 Ω) and minimal attenuation at cryogenic temperatures
- Material selection balances low thermal conductivity with high electrical conductivity to reduce heat load across temperature gradients