Quantinuum

aid: quantinuum
name: Quantinuum
description: >-
  Quantinuum is an integrated quantum computing company formed by the 2021
  merger of Honeywell Quantum Solutions and Cambridge Quantum. It builds
  trapped-ion (QCCD) quantum computers — the H1, H2, and Helios System Models —
  and develops the full software stack that runs on them: the Nexus cloud
  platform, the TKET quantum compiler, the InQuanto computational chemistry
  package, the lambeq quantum natural language processing toolkit, the Guppy
  quantum programming language, the Selene emulation framework, and the Quantum
  Origin verifiable randomness service. Programmatic access to Quantinuum
  systems is delivered through the Nexus platform (Python client `qnexus` plus a
  REST/OpenAPI surface) and via partner clouds; circuits are described in
  OpenQASM 2.0 and the Quantum Intermediate Representation (QIR).
type: Index
position: Producing
access: 3rd-Party
image: https://kinlane-productions2.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - Quantum Computing
  - Trapped Ion
  - Quantum Hardware
  - Quantum Software
  - Quantum Compiler
  - Quantum Chemistry
  - Quantum Natural Language Processing
  - Quantum Random Number Generator
  - QIR
  - OpenQASM
  - Cloud Platform
url: >-
  https://raw.githubusercontent.com/api-evangelist/quantinuum/refs/heads/main/apis.yml
created: '2026-05-24'
modified: '2026-05-24'
specificationVersion: '0.20'
apis:
  - aid: quantinuum:nexus
    name: Quantinuum Nexus
    description: >-
      Nexus is Quantinuum's all-in-one quantum computing cloud platform. It
      brokers access to Quantinuum H-Series hardware (H1, H2, Helios) and to
      partner backends including IBM Quantum and Amazon Braket, manages
      projects, teams, roles, quotas, credentials, and linked accounts, and
      orchestrates job submission, compilation, results retrieval, and circuit
      visualization. Nexus exposes a Python client (`qnexus`, Apache 2.0) and a
      REST/OpenAPI surface ("Nexus OpenAPI") covered by the platform's
      Authentication & Quotas documentation. Jobs are submitted as OpenQASM 2.0
      or QIR programs and may be compiled and executed against Quantinuum
      systems or partner backends.
    humanURL: https://docs.quantinuum.com/nexus/
    tags:
      - Quantum Computing
      - Cloud Platform
      - Job Submission
      - Compilation
      - Projects
      - Teams
      - Quotas
    properties:
      - type: Documentation
        url: https://docs.quantinuum.com/nexus/
      - type: Documentation
        url: https://docs.quantinuum.com/nexus/trainings/getting_started.html
      - type: SignUp
        url: https://nexus.quantinuum.com/auth/login
      - type: SDK
        url: https://github.com/Quantinuum/qnexus
      - type: SDK
        url: https://pypi.org/project/qnexus/
  - aid: quantinuum:systems
    name: Quantinuum Systems (H-Series)
    description: >-
      The Quantinuum Systems API exposes the H-Series trapped-ion (QCCD)
      quantum computers — System Model H1, System Model H2, and the
      next-generation Helios — for circuit submission. Direct communication
      with system endpoints occurs via QIR (Quantum Intermediate
      Representation) or OpenQASM 2.0 payloads, typically brokered through
      Nexus. The H-Series supports all-to-all qubit connectivity, mid-circuit
      measurement and reset, parameterized two-qubit operations, and
      conditional logic.
    humanURL: https://docs.quantinuum.com/systems/
    tags:
      - Quantum Computing
      - Trapped Ion
      - QIR
      - OpenQASM
      - H-Series
    properties:
      - type: Documentation
        url: https://docs.quantinuum.com/systems/
      - type: Documentation
        url: https://docs.quantinuum.com/systems/user_guide/hardware_user_guide/access.html
      - type: Data
        url: https://github.com/Quantinuum/quantinuum-hardware-specifications
      - type: Data
        url: https://github.com/Quantinuum/quantinuum-hardware-quantum-volume
      - type: Data
        url: https://github.com/Quantinuum/quantinuum-hardware-h2-benchmark
  - aid: quantinuum:tket
    name: TKET
    description: >-
      TKET is Quantinuum's optimizing quantum compiler. The Python interface
      `pytket` and the C++ core `tket` provide gate-level circuit construction,
      hardware-agnostic optimization passes, routing, and backend extensions
      for Quantinuum H-Series, IBM Q (Qiskit), Amazon Braket, IQM, AQT,
      PennyLane, and others. TKET2 (Rust) is the next-generation compiler
      built on the HUGR intermediate representation.
    humanURL: https://docs.quantinuum.com/tket/
    tags:
      - Quantum Compiler
      - Circuit Optimization
      - Python SDK
      - HUGR
    properties:
      - type: Documentation
        url: https://docs.quantinuum.com/tket/user-guide/
      - type: SDK
        url: https://github.com/Quantinuum/tket
      - type: SDK
        url: https://github.com/Quantinuum/tket2
      - type: SDK
        url: https://github.com/Quantinuum/pytket-quantinuum
      - type: SDK
        url: https://pypi.org/project/pytket/
      - type: CodeExamples
        url: https://github.com/Quantinuum/pytket-docs
  - aid: quantinuum:inquanto
    name: InQuanto
    description: >-
      InQuanto is Quantinuum's computational quantum chemistry platform for
      molecular and materials simulations on near-term and fault-tolerant
      quantum computers. It implements VQE, quantum phase estimation, and
      advanced ansätze/error-mitigation, with integrations to PySCF and other
      classical chemistry tooling. Licensed to enterprise users and accessed
      via Python; runs against Quantinuum Systems and emulators through Nexus.
    humanURL: https://docs.quantinuum.com/inquanto/
    tags:
      - Quantum Chemistry
      - Molecular Simulation
      - VQE
      - QPE
    properties:
      - type: Documentation
        url: https://docs.quantinuum.com/inquanto/manual/howto.html
      - type: Portal
        url: https://www.quantinuum.com/products-solutions/inquanto
  - aid: quantinuum:lambeq
    name: lambeq
    description: >-
      lambeq is Quantinuum's open-source Python toolkit for Quantum Natural
      Language Processing (QNLP). It converts sentences into string diagrams
      (DisCoCat / DisCoCirc), rewrites them into parameterized quantum
      circuits, and trains them on classical simulators or Quantinuum
      hardware. Released under Apache 2.0.
    humanURL: https://docs.quantinuum.com/lambeq/
    tags:
      - Quantum NLP
      - QNLP
      - DisCoCat
      - Python SDK
    properties:
      - type: Documentation
        url: https://docs.quantinuum.com/lambeq/intro.html
      - type: SDK
        url: https://github.com/CQCL/lambeq
      - type: SDK
        url: https://github.com/Quantinuum/lambeq
      - type: SDK
        url: https://pypi.org/project/lambeq/
  - aid: quantinuum:guppy
    name: Guppy
    description: >-
      Guppy (`guppylang`) is Quantinuum's Pythonic quantum-classical
      programming language. Guppy programs compile through the HUGR
      hierarchical intermediate representation and target Quantinuum hardware,
      Selene emulators, and QIR-compatible backends. Designed for hybrid
      classical-quantum control flow including conditional logic, loops,
      and mid-circuit measurement.
    humanURL: https://docs.quantinuum.com/guppy/
    tags:
      - Quantum Programming Language
      - Hybrid Computation
      - HUGR
      - Python
    properties:
      - type: Documentation
        url: https://docs.quantinuum.com/guppy/getting_started.html
      - type: SDK
        url: https://github.com/Quantinuum/guppylang
      - type: SDK
        url: https://github.com/Quantinuum/hugr
  - aid: quantinuum:selene
    name: Selene
    description: >-
      Selene is Quantinuum's plugin-extensible emulator for hybrid quantum
      computation. It simulates the behavior of Quantinuum H-Series hardware
      including mid-circuit measurement, conditional control flow, and
      QIR-defined programs, with pluggable noise models and runtime backends.
    humanURL: https://docs.quantinuum.com/selene/
    tags:
      - Emulator
      - Simulation
      - Hybrid Computation
      - QIR
    properties:
      - type: Documentation
        url: https://docs.quantinuum.com/selene/user_guide/overview.html
      - type: SDK
        url: https://github.com/Quantinuum/selene
  - aid: quantinuum:quantum-origin
    name: Quantum Origin
    description: >-
      Quantum Origin is Quantinuum's verifiable quantum random number
      generation service, delivering cryptographically strong entropy seeded
      by quantum measurements for use in PKI, key generation, and other
      security workloads. Available as a hosted cloud API and on-prem
      appliance.
    humanURL: https://docs.quantinuum.com/origin/
    tags:
      - Quantum Random Number Generator
      - QRNG
      - Cryptography
      - Security
    properties:
      - type: Documentation
        url: https://docs.quantinuum.com/origin/user_guides/introduction/summary.html
      - type: Portal
        url: https://www.quantinuum.com/products-solutions/quantum-origin
  - aid: quantinuum:qermit
    name: Qermit
    description: >-
      Qermit is a Python module for running error-mitigation protocols
      (probabilistic error cancellation, zero-noise extrapolation,
      Clifford data regression, dynamical decoupling, etc.) on top of the
      pytket quantum SDK and Quantinuum/partner backends.
    humanURL: https://github.com/Quantinuum/Qermit
    tags:
      - Error Mitigation
      - Python SDK
      - pytket
    properties:
      - type: SDK
        url: https://github.com/Quantinuum/Qermit
      - type: SDK
        url: https://pypi.org/project/qermit/
common:
  - type: Portal
    url: https://www.quantinuum.com/
  - type: Documentation
    url: https://docs.quantinuum.com/
  - type: GitHubOrganization
    url: https://github.com/Quantinuum
  - type: LinkedIn
    url: https://www.linkedin.com/company/quantinuum
  - type: SignUp
    url: https://nexus.quantinuum.com/auth/login
  - type: Portal
    name: Nexus Portal
    url: https://nexus.quantinuum.com/
  - type: GettingStarted
    url: https://docs.quantinuum.com/nexus/trainings/getting_started.html
  - type: Support
    name: Quantinuum Customer Support
    url: mailto:[email protected]
  - type: Blog
    url: https://www.quantinuum.com/news
  - type: Publications
    url: https://github.com/Quantinuum/quantinuum-publications
  - type: SDK
    name: pytket (Python)
    url: https://github.com/Quantinuum/tket
  - type: SDK
    name: pytket-quantinuum
    url: https://github.com/Quantinuum/pytket-quantinuum
  - type: SDK
    name: pytket-qiskit
    url: https://github.com/Quantinuum/pytket-qiskit
  - type: SDK
    name: pytket-braket
    url: https://github.com/Quantinuum/pytket-braket
  - type: SDK
    name: pytket-cutensornet
    url: https://github.com/Quantinuum/pytket-cutensornet
  - type: SDK
    name: pytket-qir
    url: https://github.com/Quantinuum/pytket-qir
  - type: SDK
    name: qnexus (Python)
    url: https://github.com/Quantinuum/qnexus
  - type: SDK
    name: Guppy
    url: https://github.com/Quantinuum/guppylang
  - type: SDK
    name: HUGR
    url: https://github.com/Quantinuum/hugr
  - type: SDK
    name: lambeq
    url: https://github.com/CQCL/lambeq
  - type: SDK
    name: Qermit
    url: https://github.com/Quantinuum/Qermit
  - type: SDK
    name: Selene
    url: https://github.com/Quantinuum/selene
  - type: Tool
    name: Tierkreis Hybrid Workflow Manager
    url: https://github.com/Quantinuum/tierkreis
  - type: Tool
    name: cryptomite
    url: https://github.com/Quantinuum/cryptomite
  - type: Data
    name: Hardware Specifications
    url: https://github.com/Quantinuum/quantinuum-hardware-specifications
  - type: Data
    name: Quantum Volume Data
    url: https://github.com/Quantinuum/quantinuum-hardware-quantum-volume
  - type: Documentation
    name: PHIR Specification
    url: https://github.com/Quantinuum/phir
  - type: Integration
    name: Microsoft Azure Quantum
    url: https://learn.microsoft.com/azure/quantum/provider-quantinuum
  - type: Integration
    name: Quantinuum on NVIDIA CUDA-Q
    url: https://nvidia.github.io/cuda-quantum/latest/using/backends/hardware.html
  - type: Features
    data:
      - H-Series QCCD trapped-ion quantum computers (System Model H1, H2, Helios)
      - All-to-all qubit connectivity with high two-qubit gate fidelity
      - Mid-circuit measurement, reset, and conditional control flow
      - Nexus cloud platform with project, team, role, quota, and credential management
      - REST/OpenAPI surface ("Nexus OpenAPI") and `qnexus` Python client
      - Backend brokerage to IBM Quantum, Amazon Braket, and other partner systems
      - TKET / pytket optimizing compiler with extensive backend extensions
      - TKET2 next-generation compiler built on HUGR
      - Guppy Pythonic quantum-classical programming language
      - InQuanto enterprise quantum chemistry package (VQE, QPE, advanced ansätze)
      - lambeq QNLP toolkit (DisCoCat / DisCoCirc to quantum circuits)
      - Qermit error-mitigation protocols (PEC, ZNE, CDR, dynamical decoupling)
      - Selene plugin-extensible emulator for hybrid programs
      - Quantum Origin verifiable QRNG cloud API and on-prem appliance
      - QIR and OpenQASM 2.0 program submission formats
      - PHIR (PECOS High-level Intermediate Representation) data model
      - Tierkreis hybrid workflow manager
      - Public hardware specifications and Quantum Volume datasets on GitHub
      - Available via Microsoft Azure Quantum and NVIDIA CUDA-Q integrations
      - Apache 2.0 open-source licensing for pytket, qnexus, lambeq, Guppy, Selene, Qermit
    sources:
      - https://www.quantinuum.com/
      - https://docs.quantinuum.com/
      - https://docs.quantinuum.com/nexus/trainings/getting_started.html
      - https://github.com/Quantinuum
    updated: '2026-05-24'
maintainers:
  - FN: Kin Lane
    email: [email protected]
    X: apievangelist
    url: https://apievangelist.com