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Quantum Engines Powered by a Look ⚡ экспресс

Original: "Making the Virtual Real: Measurement-Powered Tunneling Engines"
arXiv:2510.22394 · 2025-10-25 · CC BY 4.0 · ⏱ 1 min · Quantum Physics Mesoscale
Detecting a particle passing through a barrier can provide energy and even cool the system.
Abstract

Quantum tunneling lets electrons slip through barriers. If you measure a particle inside such a barrier, it gains energy and can make a jump. This effect is the basis for quantum engines that produce power and cold just by observing. Imagine: a glance makes an electron leap over a wall. Could observation become fuel for nanomachines?

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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.

Scientists
Christian DopplerD. B. McLaughlinDidier QuelozMichel MayorR. A. RossiterEmmy Noether
Tags
entropy Standard Model spectroscopy
Laws
second law of thermodynamicsDoppler effectNoether's theoremBekenstein-Hawking entropyMaxwell's equationsPlanck's law
Original: arXiv:2510.22394 · CC BY 4.0 · bridge42worlds