QTREX Quantum Announces Independent Cryogenic Testing Results Confirming AME Interconnect Performance for Quantum Computing Applications

Ness Ziona, Oct. 01, 2026 (GLOBE NEWSWIRE) -- QTREX Quantum Ltd . (Nasdaq: QTEX) ("QTREX" or the "Company"), a company focused on advancing Additively Manufactured Electronics ("AME") for quantum computing infrastructure, today announced the results of independent testing of its AME cryogenic interconnect by one of the quantum computing industry's leading companies. The testing company conducted separate microwave transmission tests at 20 millikelvin in its own cryogenic system, using its own instruments, reference cables and calibration standards. The results confirm the interconnect's microwave performance at an operating temperature of superconducting quantum processors. On the strength of these results, QTREX and the testing company are finalizing a binding definitive agreement.

Key results:

• Channel-to-channel isolation better than 100 dB across the 4 to 8 GHz qubit band, between adjacent channels on a 0.34 millimeter pitch over a 15 centimeter run. No crosstalk was detected above the instrument's noise floor in any tested channel pair, adjacent or not. This exceeds the published 40 dB channel to channel crosstalk specification of leading flexible cryogenic cabling by more than 60 dB.
• Channel-to-channel phase matching at 20 millikelvin. Cryogenic testing confirmed that channels formed together in a single monolithic AME body remain phase matched, supporting precise coordination of microwave signals for qubit control and readout.
• Impedance held constant along the entire line, with reflections from the line itself below 55 dB from 2 to 15 GHz, a uniformity previously seen only in machined coaxial cable.
• Insertion loss at 20 millikelvin of approximately 1 dB at 1 GHz and 2 dB at 6 GHz, including connectors. Cooling from room temperature reduced insertion loss, expressed in dB, by approximately a factor of three.
• Performance unchanged across repeated cooldowns. The channels measured at 20 millikelvin returned the same results in a second cooldown after warming to room temperature.
• RF performance unchanged under significant bending and after vacuum exposure, with X-ray and optical inspection showing no cracks, delaminations or subsurface defects.