Omega: A manufacturable chipset for utility-scale quantum computing

Designed for fault-tolerance. Built in a tier-1 semiconductor fab. Engineered to scale.

Twenty years after our founding team demonstrated the first quantum transistor for photons, Omega marks the transition from laboratory experiment to manufacturable, scalable quantum hardware. Every component in Omega was designed from the ground up to meet the performance and integration thresholds of a fault-tolerant, million-qubit scale system.

Inside Omega

Blueprint Slider with Video

Mass-manufacturable quantum chips

When we think of manufacturing for quantum computing, we typically imagine a small-scale university cleanroom or an R&D fab which can accommodate exotic materials, atomic scale fabrication, and novel devices — and, by extension, a long road to scale.

PsiQuantum's wafers are now built by the thousands, at the highest possible level of technical maturity — in a high-volume, commercial semiconductor foundry. Our Omega platform integrates superconducting single photon detectors, single photon sources, and a high-performance optical switch into a single ultra-low-loss silicon nitride platform, containing all the components we need for optical quantum computing, each having beyond-state-of-the-art performance.

Learn more in our manuscript published in Nature.

Source

PsiQuantum's qubits are encoded using telecom-band (1550nm) single photons, generated on-chip using resonantly-enhanced spontaneous four-wave-mixing.

SOURCE PURITY ~ 99.8%

HOM VISIBILITY, UNTUNED RINGS ~ 99.7%

Interferometer

To perform single-qubit and two-qubit gates, we split and recombine photons using on-chip interferometers.

Thanks to the extreme process control of our manufacturing process, our interferometers achieve up to 99.999% fidelity.

EXTINCTION RATIO > 50dB

Edge Coupler

We're fortunate that we can network chips using standard telecom fiber, but it's important we don't lose qubits at the interface. Chip-to-fiber coupling must be ultra-low-loss.

We’ve reduced industry standard losses from ~50% to ~1%, enabling die-to-die networking at error-correction-compatible levels.

COUPLING LOSS ~ 50mdB

Switch

The biggest obstacle to the scaleup of photonic quantum computing is the fact that the photon sources and gates are both nondeterministic. The key to overcoming this challenge is fast, low-loss optical switching. PsiQuantum built the biggest molecular beam epitaxy tool in the world and successfully delivered a 300mm manufacturing process for optical switches based on Barium Titanate (BTO) — the "holy grail" of optical switching materials.

LOSS ~ 10dB/m

ELECTRO OPTIC COEFFICIENT ~ 1000pm/V

Detector

We use single photons as our quantum information carriers.

Superconducting films, biased near their transition point, enable efficient single-photon detection. We have introduced near-perfect superconducting films into our manufacturing flow, and now manufacture millions of waveguide-integrated photon-number-resolving superconducting single-photon detectors at GlobalFoundries.

We’ve extended this to photon-number resolution, critical for entanglement and error reduction.

ON-CHIP EFFICIENCY ~ 98%

Yielding record-breaking quantum performance metrics

99.98%

± 0.01% single-qubit SPAM fidelity

Confirming near-perfect qubit initialization and readout

99.5%

± 0.25% quantum interference visibility

Proving the indistinguishability of photons from independent sources

99.72%

± 0.04% chip-to-chip fidelity

Demonstrating high-fidelity qubit transmission over optical fiber

99.22%

± 0.12% two-qubit fusion fidelity

Validating the accuracy of our entangling operations

Retiring the chandelier

Scalable cryogenic infrastructure is a core challenge in quantum computing. While traditional systems rely on fragile, millikelvin “chandelier” dilution refrigerators, our photonic architecture enables a fundamentally different approach. We've replaced the chandelier with a high-power, manufacturable cryogenic module—closer in form to a datacenter rack and engineered for integration with industrial-scale cryoplants. Operating at 2–4 K, these modules support efficient, large-scale deployment of quantum systems.

Chandelier

PsiQuantum’s modular cabinet

From Omega to utility-scale quantum systems

We’ve already characterized millions of devices on thousands of wafers and perform around half a million measurements each month. Now, we’re assembling the systems that will bring utility-scale fault-tolerant quantum computing to life—starting in Brisbane and Chicago.

Dive deeper into Omega

Read on Nature →

Read on ArXiv →

Omega Imagery →