qiskit-qrack-provider

This repository contains a Qrack provider for Qiskit. You must install PyQrack to use it.

Performance can benefit greatly from following the Qrack repository "Quick Start" and "Power user considerations."

Qrack is a GPU-accelerated simulator with optional pure-CPU and CPU/GPU-hybrid simulation, scaling from minimalist systems to multiple GPUs for high performance, with novel near-Clifford, Schmidt-decomposition, quantum binary decision diagram (QBDD), light-cone optimization, state vector, and other simulation techniques. This repository provides the Qrack QasmSimulator.

This provider is based on and adapted from work by the IBM Qiskit Team and QCGPU's creator, Adam Kelly. Attribution is noted in content files, where appropriate. Original contributions and adaptations were made by Daniel Strano of the VM6502Q/Qrack Team.

To use, in Qiskit:

from qiskit.providers.qrack import Qrack

backend = Qrack.get_backend('qasm_simulator')

For example, for use with unitaryfund/mitiq, creating a (noiseless) executor can be as simple as follows:

from qiskit.providers.qrack import Qrack

def executor(circuit, shots=1000):
    """Executes the input circuit and returns the noisy expectation value <A>, where A=|0><0|.
    """
    # Use the Qrack QasmSimulator backend, (but it's specifically noiseless)
    ideal_backend = Qrack.get_backend('qasm_simulator')

    # Append measurements
    circuit_to_run = circuit.copy()
    circuit_to_run.measure_all()

    # Run and get counts
    print(f"Executing circuit with {len(circuit)} gates using {shots} shots.")
    job = ideal_backend.run(circuit_to_run, shots=shots)
    counts = job.result().get_counts()

    # Compute expectation value of the observable A=|0><0|
    return counts["0"] / shots

Generally, you will need to adapt the above executor snippet to your particular purpose.

(Happy Qracking! You rock!)

Release files for qiskit-qrack-provider 1.19.1

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for qiskit-qrack-provider 1.19.1
File	Size	Uploaded
qiskit_qrack_provider-1.19.1.tar.gz	24.2 kB	Sep 16, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for qiskit-qrack-provider 1.19.1
File	Interpreter	ABI	Platform	Reset
qiskit_qrack_provider-1.19.1-py3-none-any.whl 33.0 kB Sep 16, 2026	Python 3	none	any	Details

Total release size: 57.2 kB

Release files / qiskit_qrack_provider-1.19.1.tar.gz

Download URL	qiskit_qrack_provider-1.19.1.tar.gz
Size	24.2 kB
Tags	Source
SHA-256 checksum How to use checksums	`32c257d7ff2c48dac3f58632a49eec6710ba6d7692c51338d85fd16cc63fe222`
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Upload date	Sep 16, 2026
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Uploaded via	`twine/7.0.0 CPython/3.14.4`

Release files / qiskit_qrack_provider-1.19.1-py3-none-any.whl

Download URL	qiskit_qrack_provider-1.19.1-py3-none-any.whl
Size	33.0 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`29a866f5b4765150c7af131ae585b15a00af2bd5fac0c542824e3dda4bdb9a8e`
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Upload date	Sep 16, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.14.4`