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-images.s3.amazonaws.com/shared/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: SDKs
    url: https://github.com/Quantinuum/qnexus
  - type: SDKs
    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: SDKs
    url: https://github.com/Quantinuum/tket
  - type: SDKs
    url: https://github.com/Quantinuum/tket2
  - type: SDKs
    url: https://github.com/Quantinuum/pytket-quantinuum
  - type: SDKs
    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: SDKs
    url: https://github.com/CQCL/lambeq
  - type: SDKs
    url: https://github.com/Quantinuum/lambeq
  - type: SDKs
    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: SDKs
    url: https://github.com/Quantinuum/guppylang
  - type: SDKs
    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: SDKs
    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: SDKs
    url: https://github.com/Quantinuum/Qermit
  - type: SDKs
    url: https://pypi.org/project/qermit/
common:
- type: DomainSecurity
  url: security/quantinuum-domain-security.yml
- 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:qcsupport@quantinuum.com
- type: Blog
  url: https://www.quantinuum.com/news
- type: Publications
  url: https://github.com/Quantinuum/quantinuum-publications
- type: SDKs
  name: pytket (Python)
  url: https://github.com/Quantinuum/tket
- type: SDKs
  name: pytket-quantinuum
  url: https://github.com/Quantinuum/pytket-quantinuum
- type: SDKs
  name: pytket-qiskit
  url: https://github.com/Quantinuum/pytket-qiskit
- type: SDKs
  name: pytket-braket
  url: https://github.com/Quantinuum/pytket-braket
- type: SDKs
  name: pytket-cutensornet
  url: https://github.com/Quantinuum/pytket-cutensornet
- type: SDKs
  name: pytket-qir
  url: https://github.com/Quantinuum/pytket-qir
- type: SDKs
  name: qnexus (Python)
  url: https://github.com/Quantinuum/qnexus
- type: SDKs
  name: Guppy
  url: https://github.com/Quantinuum/guppylang
- type: SDKs
  name: HUGR
  url: https://github.com/Quantinuum/hugr
- type: SDKs
  name: lambeq
  url: https://github.com/CQCL/lambeq
- type: SDKs
  name: Qermit
  url: https://github.com/Quantinuum/Qermit
- type: SDKs
  name: Selene
  url: https://github.com/Quantinuum/selene
- type: Tools
  name: Tierkreis Hybrid Workflow Manager
  url: https://github.com/Quantinuum/tierkreis
- type: Tools
  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: Integrations
  name: Microsoft Azure Quantum
  url: https://learn.microsoft.com/azure/quantum/provider-quantinuum
- type: Integrations
  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: info@apievangelist.com
  X: apievangelist
  url: https://apievangelist.com