Quantum++

Quantum++ provides a C++11 header-only, multi-threaded library for simulation and analysis of arbitrary quantum processes and classical reversible logic with measurable performance characteristics.

Key Features:

• Implementation: Composed entirely of header files and developed in C++11.
• Multi-threading: Employs a multi-threaded approach to leverage modern multi-core processors.
• Quantum process support: Supports simulation of arbitrary quantum processes not limited to specific qubit systems.
• State simulation capacity: Capable of simulating up to 25 qubits in pure states or 12 qubits in mixed states on typical hardware (e.g., Intel i5 with 8GB RAM).
• Memory constraints: Simulation scale is primarily constrained by available physical memory.
• Classical reversible logic: Simulates classical reversible logic on a massive scale (billions of bits) for circuits relying on Toffoli gates and arithmetic circuits.
• Modularity and extensibility: Designed for modularity and extensibility to adapt to specific research needs.

Scientific Applications:

• Theoretical research: Exploration of fundamental aspects of quantum mechanics through simulation of quantum processes.
• Quantum algorithm development: Development of new quantum algorithms using arbitrary-process simulation capabilities.
• Algorithm optimization: Optimization and analysis of existing quantum algorithms via high-fidelity simulation.
• Hybrid classical–quantum systems: Investigation of systems integrating classical reversible logic with quantum circuits, including Toffoli-based arithmetic circuits.

Methodology:

Implemented in C++11 as a header-only library and employing a multi-threaded approach; simulations are constrained primarily by available physical memory.