qBraid-QIR
qBraid-SDK extension providing support for QIR conversions.

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Motivation

This project aims to make QIR representations accessible via the qBraid-SDK transpiler, and by doing so, open the door to language-specific conversions from any and all high-level quantum languages supported by qbraid.See QIR Alliance: Why do we need it?

QIR Alliance

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Installation

qBraid-QIR requires Python 3.10 or greater, and can be installed with pip as follows: 
pip install qbraid-qir

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Optional dependencies

qBraid-QIR offers integrations that require extra (optional) dependencies, which can be installed as follows: For Cirq to QIR conversions, install the cirq extra: 
pip install 'qbraid-qir[cirq]'
For OpenQASM 3 to QIR conversions, install the qasm3 extra: 
pip install 'qbraid-qir[qasm3]'

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Install from source

You can also install from source by cloning this repository and running a pip install command in the root directory of the repository: 
git clone https://github.com/qBraid/qbraid-qir.git
cd qbraid-qir
pip install .
To include optional dependencies when installing from source, use the same “extras_require” format, e.g. 
pip install '.[cirq,qasm3]'

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Check version

You can view the version of qbraid-qir you have installed within a Python shell as follows: 
In [1]: import qbraid_qir

In [2]: qbraid_qir.__version__

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Usage examples

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Cirq conversions

import cirq
from qbraid_qir.cirq import cirq_to_qir

q0, q1 = cirq.LineQubit.range(2)

circuit = cirq.Circuit(
  cirq.H(q0),
  cirq.CNOT(q0, q1),
  cirq.measure(q0, q1)
)

module = cirq_to_qir(circuit, name="my-circuit")

ir = str(module)

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OpenQASM 3 conversions

from qbraid_qir.qasm3 import qasm3_to_qir

program = """
OPENQASM 3;
include "stdgates.inc";

qubit[2] q;
bit[2] c;

h q[0];
cx q[0], q[1];

measure q[0] -> c[0];
measure q[1] -> c[1];
"""

module = qasm3_to_qir(program, name="my-program")

ir = str(module)
Currently Supported Operations

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Add QIR node to qBraid conversion graph

from qbraid_qir.cirq import cirq_to_qir
from qbraid.transpiler import Conversion, ConversionGraph

graph = ConversionGraph()

conversion = Conversion("cirq", "qir", cirq_to_qir)

graph.add_conversion(conversion)

graph.plot()

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Architecture diagram

qBraid-SDK transpiler hub-and-spokes architecture with qbraid-qir integration (left) mapped to language specific conversion step in QIR abstraction layers (right).

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Contributing

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Citation

If you use qBraid-QIR in your research, we kindly request that you cite it appropriately. The BibTeX entry below is aligned with the latest stable release. For the most up-to-date citation details, please refer to CITATION.cff. 
@software{Gupta_qBraid-QIR_Python_package_2025,
author = {Gupta, Harshit and and Hill, Ryan James},
license = {Apache-2.0},
month = mar,
title = {{qBraid-QIR: Python package for QIR conversions, integrations, and utilities.}},
url = {https://github.com/qBraid/qbraid-qir},
version = {0.3.1},
year = {2025}
}

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Acknowledgements

This project was conceived in cooperation with the Quantum Open Source Foundation (QOSF). Quantum Open Source Foundation

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License

Apache-2.0 License