The provided text outlines the emerging role of quantum computing in transforming the energy sector, specifically focusing on its ability to solve complex power grid optimization problems. A central highlight is the 2025 collaboration between IonQ and Oak Ridge National Laboratory, which utilised hybrid quantum-classical algorithms to address the “Unit Commitment” challenge for electricity generation. Beyond this landmark project, the sources describe a global competitive landscape featuring major players like IBM, D-Wave, and Pasqal who are investigating applications in renewable integration and market simulation. For transmission system operators such as Denmark’s Energinet, the technology offers promising future capabilities for grid planning, forecasting, and stability assessments. While current hardware remains in the noisy intermediate-scale phase, the reports suggest that quantum advantage for utility-scale operations could be realised within the next decade. Ultimately, the documentation serves as both a technical primer on quantum mechanics—such as superposition and entanglement—and a strategic roadmap for the modernisation of critical infrastructure.