Quantum batteries proposed to power next-generation quantum computers
Researchers from Australia and Japan have unveiled a theoretical framework for quantum batteries designed to energize quantum computers, promising faster performance, superior energy efficiency, and simplified development. Detailed in a study published January 28 in Physical Review X, the concept could quadruple the qubit capacity in current cryogenic systems while slashing the infrastructure demands that have long hindered commercial progress in quantum computing.
Quantum computers rely on fragile quantum states to perform calculations far surpassing classical machines, yet preserving these states demands room-sized cryogenic cooling systems that guzzle power alongside complex room-temperature electronics. These hurdles remain key barriers to scaling the technology. The proposed quantum batteries sidestep these issues by storing energy via light, recharging simply through exposure rather than chemical reactions. When linked to a quantum processor, they entangle with the qubits, forging a shared quantum connection that recycles energy internally instead of drawing constant external power.
Dr. James Quach, co-author and quantum battery researcher at Australia's CSIRO, likened the innovation to providing computers with their own internal fuel reservoir. "Rather than constantly refilling from the power grid, the battery recharges while the machine operates," he explained. Co-authored by Yaniv Kurman, Kieran Hymas, Arkady Fedorov, William J. Munro, and Quach, the study shows these systems would generate less heat, require fewer wiring components, and pack more qubits into tighter spaces.
Beyond efficiency gains, simulations indicate the setup could boost computation speeds through quantum superextensivity, a counterintuitive effect where adding qubits actually accelerates processing. Though still theoretical, the team's next goal is a practical prototype. Quach views this as a breakthrough in quantum energy, opening thrilling paths for quantum computing's future despite the nascent stage of quantum battery tech.
