which crypto is using quantum system

As of my last knowledge update in October 2023, there is not a widely adopted cryptocurrency that utilizes quantum computing directly in its operation. However, the intersection of quantum computing and cryptocurrency is an area of significant research due to the potential for quantum computers to break traditional cryptographic algorithms used in blockchain technologies. Some projects and researchers are focusing on developing quantum-resistant algorithms to safeguard against the threats posed by future quantum computers. These efforts are often referred to as "post-quantum cryptography." Various blockchain projects have begun exploring these concepts, aiming to prepare for a future where quantum computing could compromise current cryptographic standards. If you're looking for specifics, it's best to stay updated with the latest developments in the crypto space, as the landscape can change rapidly. Always do thorough research or consult recent sources for the latest information.