#superconductingquantumcomputers

Isentroniq raises €7.5MM to fix quantum computer wiring.

The French deep-tech startup Isentroniq raised €7.5 million to scale superconducting quantum computers' wiring architecture. The France 2030 initiative, Bpifrance, the National Research Agency, OVNI Capital, Kima Ventures, iXcore, Better Angle, and Epsilon VC supported this fundraising round led by Heartcore Capital.

Technology Issue

Superconducting quantum computers' qubits must be kept at millikelvin temperatures in dilution freezers. The qubits' control and read-out wires are coupled to room-temperature circuits. Heat, space, and cost rise with cables. Once systems exceed hundreds of qubits, these issues become more serious.

For fault tolerance and practical applications, wiring technologies cannot scale to hundreds of qubits or million-qubit systems without significant advances. Existing infrastructure is costly, space-consuming, and energy-intensive to cool.Will Isentroniq Do?

This sophisticated wiring system reduces heat, bulk, and cost: It makes wiring and connectivity solutions. The proposed method seeks to enable 1,000× more qubits in a cryogenic container (dilution refrigerator) than current wire systems.

No fabrication facility: Isentroniq does not build its own. Instead, it designs and hires skilled fabricators. It maximizes manufacturing expertise, speeds time to market, and reduces capital cost.

The monies will be used to foster industrial relationships along the wiring/electronics supply chain and to develop a multidisciplinary engineering team with quantum, RF, mechanical, and software experts. features better prototyping, test infrastructure development, and plug-and-play wiring.

Goals and Effects

Reduce Costs: Isentroniq wants to lower the cost of a million-qubit superconducting quantum computer to €50 million. Scaling current wire systems would take considerably more.

Scalability: Alice & Bob, Google, IBM, Rigetti, IQM, and other quantum hardware makers can design large-scale systems with better wiring. Infrastructure constraints are non-algorithmic impediments.

The company expects to add pilot wiring solutions to quantum pilot lines by 2026. Follow-up commercial offerings will be expanded.

Problems and thoughts

Engineering complexity: Designing reliable, producible wire with incredibly little heat transfer at cryogenic temperatures is difficult. Selection of materials, connectors, insulation, signal integrity, thermal contraction, and other aspects are difficult.

Even with fabless design, massive production and uniformity, resilience, and compatibility with multiple quantum hardware designs require strong supply-chain interaction.

New wiring designs must work with quantum processor, cooling, and control/readout electrical technologies. You may need modularity and customization.

Clients and investors will examine the pros and cons of new wiring, including redesign or retrofitting, especially in the short term.

It's Important to Fund This

Error correction, gate fidelity, and coherence times have been a focus of the quantum community. Building infrastructure interconnects, wiring, and cryogenics is usually less noticeable but just as crucial. The foundational barrier is Isentroniq's focus.

To achieve fault tolerance in quantum computing, several logical qubits and physical qubits are needed. Infrastructure and wiring must develop with the system. Funding accelerates that goal.

Deep Tech Trend in Europe: Europan venture finance and government initiatives (France 2030, Bpifrance, and ANR) show that quantum hardware infrastructure is becoming a strategic priority. Additionally, it highlights Europe's role in the quantum race.

Perspective

Within 1-2 years, prototype wiring and interconnects should be evaluated in existing quantum machines, adopted by labs and small enterprises, and integrated into initial commercial pilot projects.

Medium term (3-5 years): Isentroniq could wire larger superconducting quantum processors, lowering operating costs, facility size, and thermal efficiency.