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COMPANY RESEARCH · Computing hardware

PsiQuantum

Encodes quantum information in photons and aims to connect manufactured photonic components into an error-corrected system. Construct helps developers design algorithms and estimate the resources future machines would require.

Official website ↗
United States / Australia · Research reviewed 7 Sept 2026

Initial record: initial assessment recorded.

Review history 1 record

Record dates show when an assessment or clarification was saved. Review dates show the evidence check. Earlier records were recovered from QubitWire’s source history; no earlier score movement is inferred.

TECHNOLOGY & ACCESS

What it does. Where it fits.

Silicon photonics for fault-tolerant computing

Who should look closer

People studying photonic architectures, fault-tolerant algorithms and the resource requirements of future applications.

QubitWire’s editorial assessment of practical fit.

Software available; hardware in development

Construct is accessible for algorithm design, simulation and resource analysis. The reviewed sources do not establish a generally available PsiQuantum hardware-execution service.

Check the current access route ↗
DOCUMENTED EVIDENCE

What has been demonstrated

A 2025 Nature paper reports measured photonic modules and fusion operations. The quoted state and fusion fidelities are conditioned on photon detection and exclude loss; the paper separately measures optical losses. These are component demonstrations rather than an entire fault-tolerant computer.

Nature portfolio study ↗

What remains unresolved

The quoted state and fusion fidelities exclude photon loss and do not establish an integrated fault-tolerant computer. Facility construction and evaluation-program participation are not delivered computing capability; this maturity assessment does not forecast future scientific potential.

The next question to watch

Can integrated systems control photon loss and error-correction overhead sufficiently to demonstrate sustained logical computation with useful end-to-end performance?

A research question, not a promised milestone.

QubitWire coverage

No published QubitWire stories currently match this organization. The evidence sources below provide the starting point.

CHECK THE ORIGINALS

Sources & evidence

  1. A manufacturable platform for photonic quantum computing ↗Organization-originated source · 26 Feb 2025

    PsiQuantum’s team benchmarks silicon-photonic modules, including 99.22% ± 0.12% two-qubit fusion fidelity. Reported fidelities are conditional on photon detection and exclude loss.

  2. PsiQuantum Breaks Ground in Australia on Site of World’s First Utility-Scale Quantum Computer ↗Organization-originated source · 18 Jun 2026

    The June 18, 2026 announcement reports construction starting at Moreton Bay Central. Cryoplant delivery is expected in the second half of 2027, followed by commissioning and installation.

  3. DARPA eyes companies targeting industrially useful quantum computers ↗External source (may be a collaborator) · 3 Apr 2025

    DARPA confirms PsiQuantum is entering the final US2QC phase, aimed at verification and validation of an industrially useful system. Program entry is not a completed validation.

  4. PsiQuantum Makes Construct FTQC Software Available to All Developers ↗Organization-originated source · Publication date not stated

    Announces free open access to Construct for circuit design, algorithm simulation and resource analysis targeting future fault-tolerant computers; it does not offer execution on a delivered PsiQuantum QPU.

  5. PsiQuantum Construct Enables Utility-Scale Quantum Application Development with CUDA-Q Integration ↗Organization-originated source · 16 Mar 2026

    Describes requested early access to CUDA-Q integration for GPU state-vector simulation inside Construct. These are classical simulations, not quantum-hardware results.

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