Mezze is quantum computing toolkit that can be used for simulating and characterizing noisy quantum systems. It supports methods for fast simulation of spatiotemporally correlated noise in multi-qubit quantum circuits. Furthermore, it possesses tools for performing characterization protocols, such as quantum noise spectroscopy. The tool interfaces with Google’s Cirq and IBM’s Qiskit APIs.

Mitiq is a Python toolkit for implementing error mitigation techniques on quantum computers. Designed with portability in mind, Mitiq is made to slot in to your existing quantum compute workflows with ease, independent of the choice of quantum SDK.

Quandary is an open-source C++ software designed to simulate and optimize the evolution of both open and closed quantum systems based on Lindblad’s equations. It plays a key role in quantum state preparation by modeling how shaped and timed control pulses affect quantum devices, then iteratively refining these pulses to drive systems toward target states. This process is essential for tasks such as quantum error correction, gate operations, and information processing. Uniquely, Quandary operates in a high-performance, massively parallelized setting, enabling simulations of complex systems that include environmental interactions. It also offers user-friendly interfaces in Julia and Python, making it accessible and adaptable for broader quantum computing applications beyond its initial testbed, QuDIT.

The Unitary Compiler Collection (UCC) is a Python library for frontend-agnostic, high performance compilation of quantum circuits. UCC’s goal is to gather together the best of open source compilation to make quantum programming simpler, faster, and more scalable. By leveraging qBraid, UCC interfaces automatically with multiple quantum computing frameworks, including Qiskit, Cirq, and PyTKET and supports programs in OpenQASM 2 and OpenQASM 3.