Quantum computing, harnessing qubits, enables exponentially faster complex computations, posing a threat to current encryption but also offering quantum-resistant cryptography1.... Blockchain technology provides decentralised, immutable, and transparent data management for secure transactions, widely used in healthcare, supply chains, and finance4.... The quantum blockchain combines these for enhanced security and efficiency, designed to withstand quantum computer attacks1....

In healthcare, this amalgamation improves Electronic Health Record (EHR) security, patient data sharing, diagnosis speed, and supply chain integrity, notably in combating counterfeit drugs3.... Quantum computing also significantly aids drug discovery, genomics, and Artificial Intelligence (AI)3....However, challenges persist, including scalability, high implementation costs, noise sensitivity, and distance limitations in quantum cryptography, coupled with the nascent stage of quantum technology19.... Despite these hurdles, their integration promises sustainable solutions for diverse sectors like healthcare, smart manufacturing, and energy management, driving continued research for global welfare25...