Quantum Engines Powered by a Look ⚡ экспресс
Quantum tunneling allows electrons to traverse energetically forbidden barriers. Position measurement, detecting a particle inside the barrier, forces it to transition from a classically forbidden state to a state with energy above the barrier. This effect is harnessed to create quantum tunneling engines, where unconditional detection of virtually occupied states serves as a resource for power generation and cooling. It is shown that the device can operate in a hybrid mode, simultaneously producing work and extracting heat. Autonomous cooling via measurements and "control" cooling, driven solely by a thermal bias without applied potential, have been demonstrated. A "noise-cleaning" effect has been discovered, where measurements drive the system into a stationary dark state. These results highlight the dual role of measurement as a thermodynamic resource and a generator of dark states.
In the quantum world, particles can walk through walls—this is quantum tunneling. If you place a detector right in the path of such a 'ghostly' passage, the moment of detection acts like a starting pistol: the particle gets a sharp kick and flies out of the barrier with excess energy, turning into a tiny engine. The device needs no batteries or external voltage—the observation itself serves as fuel.
This engine obeys the strict laws of thermodynamics and can simultaneously heat and cool its surroundings. In a certain regime, it reaches a 'dark state'—ceasing to exchange heat with the outside world, as if vanishing for any thermometer. Such motors, inspired by methods of spectroscopy, could one day power nanorobots or cool quantum computers simply by existing.
As John von Neumann predicted, measurement is a physical action, and now it literally becomes fuel.
🎯 Without the tunnel effect, the Sun wouldn't shine: protons couldn't overcome electric repulsion and fuse into helium—it's tunneling that kick-starts thermonuclear fusion in stars.