Approaching Carnot Efficiency at Finite Power in an Experimentally Feasible Quantum Heat Engine
Building heat engines that squeeze out maximum efficiency without sacrificing power
Researchers designed a quantum heat engine using superconducting circuits that can approach the theoretical efficiency limit (Carnot efficiency) while still producing useful power—something impossible for classical engines. The trick is harnessing collective quantum effects that boost the engine's activity in ways classical systems cannot match.
Classical heat engines face a hard trade-off: boost efficiency and power drops, or maintain power and efficiency suffers. Cracking this constraint could reshape how we design future quantum devices and energy systems. This work proves the mechanism isn't just theoretical—it can actually be built and tested in real hardware.