quantlib

Parallel C library for quantum calculations with MPI support

• Provides tools for quantum state manipulations and N-qubit quantum transformations.
• Such common gates as Hadamard, NOT, CNOT, ROT and etc are provided.
• Transformations with custom matrices are available also.
• Quantum state vectors can be stored & loaded as binary files.
• Non-parallel mode is available with one MPI process.

Compilation & Testing

$ git clone https://github.com/Zherdev/quantlib.git
$ cd quantlib
$ make
$ make test-run-mpiexec

• Static library in quantlib/lib/bin/quantlib.a.
• Headers in quantlib/lib/include/quantlib.h.
• See quantlib/Makefile for additional info.

Examples

See test suites in quantlib/test/src/test.c source codes for quantlib usage examples.

#include "quantlib.h"

...

// Hadamard transformation example.

const uint64_t qubits_num = 5;
const uint64_t target_qubit = 1;

struct quant_state_vector v = {0};
quant_state_vector_alloc(&v, qubits_num);
quant_state_vector_fill_random(&v);

struct quant_state_vector res = {0};
quant_state_vector_alloc(&res, qubits_num);

int8_t err = quant_transform_hadamard(&v, &res, target_qubit);
if (err) {
    return err;
}

quant_state_vector_free(&v);
quant_state_vector_free(&res);

Notes

• MPI-processes number are expected to be 2^N, N >= 0.
• N may be equal to zero, so it is possible to run calculations in the non-parallel mode.

Performance

Performance was tested on CMC MSU Polus IBM Power 8 high performance cluster.

See quantlib/benchmarking for details and benchmarking utils.

Author

Zherdev, 2021.