Index

ZX-calculus based circuit sampler for universal quantum circuits.

tsim supports fast sampling from quantum circuits with few non-Clifford gates. It exposes Circuit, CompiledDetectorSampler, and CompiledMeasurementSampler objects, which follow the Stim API.

The package is organized as follows:

• circuit.py: The thin Circuit wrapper around stim.Circuit.
• sampler.py: Orchestrates compilation and evaluation to sample measurements or detectors.
• core/: ZX graph construction, parsing, and data types.
• compile/: JAX compilation pipeline including stabilizer rank decomposition.
• noise/: Pauli noise channels and detector error models.
• utils/: Utility functions for visualization and linear algebra.