Quantum++

Composed solely of template header files, enabling easy integration without complex build systems, as highlighted in the README's installation simplicity.

Written in standard C++17 with minimal external dependencies, ensuring high portability and performance across platforms, per the library's philosophy.

Capable of simulating any quantum process, not restricted to qubit systems, offering flexibility for diverse quantum information tasks, as stated in the key features.

Uses Eigen for efficient linear algebra computations and optional OpenMP for parallel execution, enhancing performance for complex simulations, detailed in the dependencies.

Includes pyqpp for Python 3 integration, allowing access from Python environments via pip, broadening usability beyond C++ developers.