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Quantinuum technical documentation

Build for the fault-tolerant era with Nexus

Guides, tutorials, and reference for how to develop, optimize, and deploy applications with the Quantinuum Nexus developer platform. Start from a task or go straight to a product.

Start with a taskExplore the platform

Quantinuum full stack

ApplicationsInQuanto · Quantum Origin
Quantinuum NexusDeveloper platform
Guppy toolkitGuppy · Selene · TKET · Guppy FT · Guppy Algorithms
Nexus ConsoleSystems support · Emulators
Quantinuum systemsHelios · H2
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Guppy FT · Nexus developer platform

Fault-tolerant programs from ordinary Guppy code

Write and check your algorithm as a normal Guppy program, then let Guppy FT encode it with quantum error correction codes such as the Steane code. The encoded program runs on Selene, through Nexus and on Quantinuum Helios.

Start the workflowRead the docs
from guppyft.code.steane.encode import SteaneBuilder

steane = SteaneBuilder().build(n_blocks=3)
encoded = steane.encode(program.compile())
Encoding an existing Guppy program with the Steane code.

Tasks

Start from what you want to do

Each task names the tools it uses, so you learn the platform as you go. Guided workflows take you from prerequisites to verified results.

Guided workflow

Write, emulate and run a program on Helios

Go from an empty file to verified results from Quantinuum Helios, emulating locally first.

GuppySeleneSystems supportHelios
  1. 1Write a Guppy program
  2. 2Emulate it locally with Selene
  3. 3Submit it to Helios through Nexus
  4. 4Verify the results
Start the workflow
Guided workflow

Make a program fault tolerant with Guppy FT

Encode an ordinary Guppy program with the Steane code and run it on emulated Helios hardware.

Guppy FTGuppySeleneSystems supportHelios
  1. 1Write the program without QEC
  2. 2Encode it with the Steane code
  3. 3Emulate the encoded program
  4. 4Run it on the Helios emulator
Start the workflow

Or pick a guide by goal

Get started

Reach a first result with the right tools.

Develop quantum programs

Write programs, bring existing circuits and build applications.

Optimize cost and performance

Estimate costs and improve results before you scale up.

Deploy to hardware and production

Run on Quantinuum systems, manage access and integrate with your stack.

Products

Go straight to a product

Already know what you need? Every product overview has the same layout: get started, guides, reference and support, always in the same place.

See how they fit together

Reference

Look something up

Jump straight to API documentation for each package.

Guppy APIguppylangGuppy FT APIguppyftGuppy Algorithms APIguppyalgosSelene APIselene_simTKET APIpytketNexus APIqnexusInQuanto APIinquanto
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