A GPU accelerated quantum computing simulator library.

• ArrayFire

The qs::Circuit class represents a quantum circuit. The constructor takes the number of qubits in the circuit as a parameter. Quantum gates (represented by the qs::Gate class) can be added to a circuit using the qs::Circuit::apply method, which takes the gate and the index of the qubit to apply it to. Some common gates can be found in the qs::Gates namespace. Custom gates can be created by instantiating the qs::Gate class and passing the constructor the number of qubits the gate acts on and the complex unitary matrix representing the gate as an ArrayFire af::array. The probabilities of different measurement outcomes can be found using the qs::Circuit::props method. Measurement, including partial measurement, can be simulated using the qs::Circuit::measure method, which optionally takes the start index of the qubits to measure and the number of qubits to measure as parameters. qs::Circuit::measure selects an outcome using weighted random selection with std::rand, which can be seeded using std::srand.

Examples can be found in the src/tests directory.

The build process requires CMake and Ninja.

cmake -S . -B build -G Ninja # For debug builds add "-DCMAKE_BUILD_TYPE=Debug"
ninja -C build

After building, run ctest --test-dir build to run tests.