QuantumCTek (688027.SS): Quantum Computer Exposure

Where it fits in a quantum computer

Sells superconducting quantum-computing hardware: ez-Q Fridge dilution refrigerators (F500 for about 100 qubits, F1100 and F1500 for about 1,000 qubits, down to 10 mK), the ez-Q Engine measurement and control system built with USTC (8 drive and 2 readout channels per unit), cryogenic coax in CuNi, stainless, aluminum and NbTi with attenuators, filters, hermetic SMA feedthroughs and Josephson parametric amplifiers, RuOx thermometers and a 16-channel temperature controller. It says the products serve USTC’s Zuchongzhi superconducting computers and the Tianyan cloud (Sept 3, 2026), and its own cloud offers a Zuchongzhi 3.0-series prototype with 107 readable qubits.

What the evidence establishes

Quantum-computing evidence

Disclosed: QuantumCTek’s product pages list its dilution refrigerators, ez-Q Engine, cryogenic cabling and thermometry; its Sept 3, 2026 release says the products serve the Zuchongzhi series and the Tianyan cloud.

An explicit quantum-computing product, design-in, supply role, program or partnership, such as a part sold for quantum computers or a named quantum-computer customer. For a maker, it means the company’s own quantum computers or processors. This does not establish revenue, market share, volumes or future sourcing.

Listed as a quantum-computer maker for its own systems, not as a supplier of the parts inside.

Component role	Dilution refrigerators, ez-Q control systems and cabling
Evidence	Disclosed: QuantumCTek’s product pages list its dilution refrigerators, ez-Q Engine, cryogenic cabling and thermometry; its Sept 3, 2026 release says the products serve the Zuchongzhi series and the Tianyan cloud.
How we know	Disclosed The company’s own filing, release, annual report, product page or investor record describes the quantum-computing role. Where customers are unnamed, the listing says so.
Primary source	QuantumCTek — supporting disclosure Company or official disclosure; vendor claims are attributed to their source.
Checked	2026-09-28. This is the research review date, not the source publication or quote time.

Keep in perspective

Quantum-secure communication dominates QuantumCTek’s catalogue and quantum-computing revenue is not broken out in these sources; product pages give no volumes or dates. Its role in the Zuchongzhi qubit chips themselves is not documented, so no processor link is made.

Specialist business exposure. This describes the breadth or role of the business; it is not an investment rating. A quantum-computing product, design-in or partnership does not by itself establish material quantum revenue, market share, or future returns.

Connections to the assembly

These links explain the technology relationship. The model is illustrative and does not represent an actual manufacturer’s bill of materials.

Mixing chamber & still

The dilution unit. In the mixing chamber, helium-3 crossing from a concentrated into a dilute phase absorbs heat; the still above evaporates it off, and heat exchangers of sintered silver precool the returning stream.

Scope of the company links: The dilution unit is built by the refrigerator maker. ULVAC’s dilution refrigerator cools the University of Osaka’s all-Japanese superconducting quantum computer (running since July 28, 2025), and ULVAC is developing a 10 mK-class model to IBM’s specifications for launch in 2026; QuantumCTek’s ez-Q Fridge F500–F1500 are designed for 100- to 1,000-qubit superconducting machines; FormFactor sells the HPD Flatiron benchtop dilution refrigerator (30 mK); Nippon Sanso has sold e-Dilution refrigerators since 2003 and is developing a larger dilution stage under NEDO; Air Liquide acquired 80% of French maker Cryoconcept in 2020 (current range not verified); and Rigetti’s 10-K says Quanta Computer may develop dilution refrigerators for it under a 2025 collaboration. Private makers include Bluefors, Quantum Design Oxford (the former Oxford Instruments NanoScience), Maybell, Leiden Cryogenics, Zero Point Cryogenics and ICEoxford. Quanta is not mapped here: the collaboration allows statements of work, and Rigetti discloses no delivered refrigerator.

Temperature stages

Gold-plated copper plates at about 50 kelvin, 4 kelvin, 0.8 kelvin (the still), 0.1 kelvin (the cold plate) and 10 millikelvin (the mixing chamber), held apart by thin supports that conduct little heat.

Scope of the company links: The copper stages come with each dilution refrigerator, so the listed refrigerator makers (ULVAC, QuantumCTek, FormFactor, Nippon Sanso) are mapped; stage sizes are published only for some systems, such as the 590 mm sample space of QuantumCTek’s F1100 and the 530 mm plate of private Quantum Design Oxford’s ProteoxLX. Mitsubishi Materials is mapped upstream because it says its high-purity copper (residual resistivity ratio above 3,000) is used in cryogenic-refrigerator components. No source names the copper or gold-plating supplier of any quantum cryostat, and Aurubis (Cu-OFE copper with no cryogenic use cited) is not mapped.

Vacuum can & shields

The outer vacuum can that seals the insert, and the radiation shields nested inside it, each bolted to its own stage, that stop warmer surfaces from shining heat onto colder ones.

Scope of the company links: The outer vacuum can and radiation shields are part of each maker’s cryostat, and no listed company documents cans or shields as a separate product for quantum cryostats, so only the listed dilution-refrigerator makers are mapped. Bluefors (private) sells additional radiation shields and magnetic shielding as options; the magnetic shields around the chip belong to the processor sector.

Thermometers & heaters

Resistance thermometers and heaters on every stage, read by a temperature controller that regulates the still and mixing chamber and reports the refrigerator’s health.

Scope of the company links: QuantumCTek makes the RX1000 ruthenium-oxide thermometer for dilution refrigerators (7–600 mK working range, calibrated against a noise thermometer below 200 mK) and the TC16 controller (16 measurement channels, 5 heater outputs). The main Western suppliers are private: Lake Shore Cryotronics (Cernox and Rox sensors, AC resistance bridges and temperature controllers; now a DwyerOmega brand) and the refrigerator makers themselves, such as Quantum Design Oxford, whose ProteoxLX specifies temperature control from 7 mK to 30 K. No other listed thermometry supplier was verified.

Support frame & isolation

The rigid frame the refrigerator hangs from, with vibration isolation between it and the floor, so pumps, the cryocooler and the building do not shake the qubits.

Scope of the company links: QuantumCTek lists a vibration-damping system in its ultra-low-temperature platform alongside the dilution refrigerator. Frames usually come from the refrigerator maker: private Quantum Design Oxford gives the ProteoxLX a cross-braced stiffened frame that limits vibration without active damping, and Bluefors (private) offers additional vibration isolation. AMETEK’s TMC vibration-isolation tables are not mapped because TMC names no cryostat or quantum use.

Cooling-water chiller

A recirculating chiller that carries the compressor’s several kilowatts of heat away in a closed water loop.

Scope of the company links: QuantumCTek lists a water chiller among the parts of its dilution-refrigerator platform without naming its maker. SHI’s F-70 compressor needs 6–9 L/min of 5–25 °C cooling water from a recirculating chiller or building supply, and air-cooled compressors avoid a chiller. Lake Shore (private) sells recirculating chillers; Thermo Fisher and SMC make recirculating chillers, but no source ties them to cryocooler compressors or quantum computers, so they are not mapped.

Coaxial lines

Semi-rigid coaxial cables of stainless steel, copper-nickel or superconducting niobium-titanium, chosen stage by stage to carry microwave signals while conducting little heat.

Scope of the company links: Semi-rigid coax (stainless steel, CuNi, CuBe or superconducting NbTi, often 0.86 mm) carries drive, flux and readout signals between stages. Huber+Suhner is mapped for its quantum-computing semi-rigid range, with NbTi lines under 0.5 dB/m at 4 K and 10 GHz; QuantumCTek sells cryogenic cable assemblies in CuNi, stainless, aluminum and NbTi specified stage by stage; QTREX’s printed coaxial interconnect is still pre-commercial. Much of the market is private: COAX Co. (Japan), TOTOKU (Japan, Carlyle-owned since its 2023 delisting), CryoCoax (an Intelliconnect division), Radiall and Bluefors, which wires its own refrigerators. Furukawa sold its 57% TOTOKU stake in 2022, and Fujikura and Furukawa showed no current quantum coax role in the sources checked.

Attenuators

Small cryogenic attenuators bolted to the plates on every input line. Each absorbs most of the signal together with the thermal noise from warmer stages above.

Scope of the company links: Attenuators anchored at 4 K, the cold plate and the mixing chamber strip thermal noise from input lines. Amphenol is mapped through XMA, which sells cryogenic attenuators (including bulkhead types), terminations and DC blocks for quantum computing and which Japan’s 2025 AIST–RIKEN–Fujitsu–NEC roadmap names among the most used cryogenic SMA attenuators; Huber+Suhner sells 0–20 dB cryogenic attenuator blocks and ganged attenuators in its multicoax system; QuantumCTek sells cryogenic attenuators with its cable assemblies. Private alternatives include API Technologies, Radiall, Quantum Microwave, CryoCoax and Delft Circuits (attenuators on the flex). Smiths Interconnect, now owned by Molex, makes RF attenuators, but no cryogenic quantum line was found.

Filters & IR absorbers

Low-pass and band-pass filters and infrared-absorbing filters that block stray high-frequency radiation, which would otherwise break the qubits’ superconducting pairs.

Scope of the company links: Low-pass, band-pass and infrared filters keep stray radiation and out-of-band noise off the qubits. Amphenol’s XMA sells cryogenic IR filters (the AIST roadmap says IR filters, once home-made by researchers, are now sold as products by XMA Amphenol and Kawashima Seisakusho), Huber+Suhner builds IR filters into its multicoax system, and QuantumCTek sells cryogenic filters with its cable assemblies. Qnity is mapped as an upstream material supplier: its Laird Eccosorb absorbers are cast into IR filters, as in ETH Zurich’s Eccosorb CR-124 filter. Conventional low- and high-pass filters come mostly from private Mini-Circuits and RLC Electronics; the roadmap also lists a ‘K&L’ filter maker, which we did not tie to Dover. Bluefors, Quantum Microwave and Delft Circuits sell private IR-filter products.

Connectors & feedthroughs

Miniature coaxial connectors at every stage and hermetic feedthroughs in the top plate that carry the lines out of the vacuum without leaking.

Scope of the company links: SMA connectors dominate between stages, smaller non-magnetic SMP or SMPM connectors sit near the chip, and hermetic feedthroughs seal the vacuum can. Huber+Suhner sells non-magnetic SMA connectors, hermetic bulkhead adapters and multicoax connectors for quantum computing; the AIST roadmap says JAE’s non-magnetic SMPM connectors are almost the only option at that size; QuantumCTek sells vacuum-hermetic adapters; Hirose’s SER unit sells NbTi multi-coax connectors for quantum computers; and TE and Bel Fuse’s Cinch are named as makers of micro-D connectors used for dense DC wiring, a generic role. Private suppliers include Rosenberger (non-magnetic SMP, widely used in Japanese labs), Fischer (hermetic DC connectors), Radiall and CryoCoax.

Parametric amplifier

A traveling-wave or Josephson parametric amplifier that boosts the few-photon readout signal while adding close to the minimum noise quantum mechanics allows.

Scope of the company links: Near-quantum-limited Josephson or traveling-wave parametric amplifiers at the mixing chamber. QuantumCTek is the only listed company we found offering one: a Josephson impedance-tapered parametric amplifier among the cryogenic components it configures for customers. Commercial TWPAs otherwise come from private firms (Silent Waves, QuantWare, SCALINQ and VASTA), Bluefors sells a readout module with a TWPA, and many qubit groups build their own. Raytheon BBN (RTX) developed a 5–7 GHz JPA sold through Quantum Microwave, but it was listed as out of stock in March 2025 and still is, so RTX is not mapped.

Waveform generators

Arbitrary waveform generators and fast digital-to-analog converters that synthesize the nanosecond pulses of every gate.

Scope of the company links: Keysight sells complete RF AWG modules (four-channel M5300A, DC–16 GHz) in its Quantum Control System, installed in a 256-qubit computer in Japan. Many controllers now synthesize pulses directly with RF data converters: AMD RFSoCs in the open-source QICK and in Zurich Instruments’ QCCS, and Analog Devices AD9082s in QuEL’s QuBE. Tektronix (Ralliant) markets its AWG5200 for superconducting-qubit control without a named customer. Zurich Instruments, Qblox, QuEL, Intermodulation Products and Spectrum Instrumentation are private. Texas Instruments’ bias DACs in QICK set DC flux levels rather than pulses, so TI is mapped under microwave sources instead. QuantumCTek’s ez-Q Engine measurement and control system (8 drive and 2 readout channels per unit) serves the Zuchongzhi superconducting computers, per its own product pages.

Readout digitizers

Fast analog-to-digital converters that capture and demodulate the readout signals, turning them into qubit measurement results.

Scope of the company links: Keysight’s QCS uses M5200A digitizers (four 2 GHz, 12-bit channels) behind M5201A down converters. RF-sampling ADCs increasingly do the job inside controllers: AMD RFSoCs capture readout in QICK and Zurich Instruments’ QCCS, and each AD9082 in QuEL’s QuBE adds two 6 GSPS ADCs. Teledyne SP Devices documents its ADQ digitizers in superconducting-qubit readout research at Royal Holloway, University of London. Zurich Instruments (SHFQA+ analyzers), Qblox, QuEL, Intermodulation Products and Spectrum Instrumentation are private. QuantumCTek’s ez-Q Engine includes readout channels, per its product pages.

Related research

Companies with overlapping sector exposure. Their products and evidence may differ; this is not a list of equivalent investments.

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