Installation¶
QCEC is mainly developed as a C++ library that builds upon MQT Core, which forms the backbone of the MQT. In order to make the tool as accessible as possible, it comes with an easy-to-use Python interface.
We encourage installing QCEC via pip (preferably in a virtual environment):
(venv) $ pip install mqt.qcec
In most practical cases (under 64-bit Linux, MacOS incl. Apple Silicon, and Windows), this requires no compilation and merely downloads and installs a platform-specific pre-built wheel.
Note
In order to set up a virtual environment, you can use the following commands:
$ python3 -m venv venv
$ source venv/bin/activate
If you are using Windows, you can use the following commands instead:
$ python3 -m venv venv
$ venv\Scripts\activate.bat
It is recommended to make sure that you are using the latest version of pip, setuptools, and wheel before trying to install the project:
(venv) $ pip install --upgrade pip setuptools wheel
Warning
As of version 2.8.0, support for Python 3.8 has been officially dropped. We strongly recommend that users upgrade to a more recent version of Python to ensure compatibility and continue receiving updates and support. Thank you for your understanding.
A Detailed Walk Through¶
First, save the following lines as ghz_3.py
in a folder where you want to install QCEC and run the example:
from qiskit import QuantumCircuit, transpile from qiskit.providers.fake_provider import FakeLondon from mqt import qcec # create your quantum circuit circ = QuantumCircuit(3) circ.h(0) circ.cx(0, 1) circ.cx(0, 2) circ.measure_all() print(circ.draw(fold=-1)) # compile circuit to 5-qubit London Architecture circ_comp = transpile(circ, backend=FakeLondon()) print(circ_comp.draw(fold=-1)) # verify the equivalence of both circuits result = qcec.verify(circ, circ_comp) # print the result print(result.equivalence)
Then, the following snippet shows the installation process from setting up the virtual environment to running a small example program.
$ python3 -m venv venv $ . venv/bin/activate (venv) $ pip install -U pip setuptools wheel (venv) $ pip install mqt.qcec (venv) $ python3 ghz_3.py ┌───┐ ░ ┌─┐ q_0: ┤ H ├──■────■───░─┤M├────── └───┘┌─┴─┐ │ ░ └╥┘┌─┐ q_1: ─────┤ X ├──┼───░──╫─┤M├─── └───┘┌─┴─┐ ░ ║ └╥┘┌─┐ q_2: ──────────┤ X ├─░──╫──╫─┤M├ └───┘ ░ ║ ║ └╥┘ meas: 3/═══════════════════╩══╩══╩═ 0 1 2 ░ ancilla_0 -> 0 ─────────────────────────────────────░────────── ┌───┐ ░ ┌─┐ q_2 -> 1 ───────────────────────────────┤ X ├─░───────┤M├ └─┬─┘ ░ └╥┘ ancilla_1 -> 2 ─────────────────────────────────┼───░────────╫─ ┌───┐ ┌───┐ │ ░ ┌─┐ ║ q_1 -> 3 ───────────┤ X ├──■──┤ X ├──■────■───░─┤M├────╫─ ┌─────────┐└─┬─┘┌─┴─┐└─┬─┘┌─┴─┐ ░ └╥┘┌─┐ ║ q_0 -> 4 ┤ U2(0,π) ├──■──┤ X ├──■──┤ X ├──────░──╫─┤M├─╫─ └─────────┘ └───┘ └───┘ ░ ║ └╥┘ ║ meas: 3/════════════════════════════════════════╩══╩══╩═ 0 1 2 equivalent
Building from Source for Performance¶
In order to get the best performance out of QCEC and enable platform-specific compiler optimizations that cannot be enabled on portable wheels, it is recommended to build the package from source via:
(venv) $ pip install mqt.qcec --no-binary mqt.qcec
This requires a C++ compiler compiler supporting C++17 and a minimum CMake version of 3.19.
The library is continuously tested under Linux, MacOS, and Windows using the latest available system versions for GitHub Actions. In order to access the latest build logs, visit qcec/actions/workflows/ci.yml.
Note
We noticed some issues when compiling with Microsoft’s MSCV compiler toolchain. If you want to start development on this project under Windows, consider using the clang compiler toolchain. A detailed description of how to set this up can be found here.