📄 Showing the "Simple" version — "Advanced" is not ready yet. Add it to favorites to help prioritize it. Ask for the full read

According to the laws of the microworld, an electron obeying the Dirac equation trembles even at complete rest. This is Zitterbewegung — an oscillation with an amplitude of trillionths of a millimeter, like a spinning top on an invisible axis. For nearly a hundred years, it couldn't be detected: the jitter is thousands of times smaller than an atomic nucleus.

Now researchers have found a way to blow it up. By passing electrons through a special "lens", the beam is twisted into a vortex — like water swirling down a drain — and two states are mixed: one with positive energy and one with negative. Negative energy isn't a trick; it's a door to the world of antimatter opened by Dirac: for a fleeting moment, the electron turns into a positron, and this transition rocks the particle. The two states add up like mutually reinforcing waves, making the oscillation noticeable.

If detectors register the trembling, we'll directly witness the link between quantum mechanics and the ultimate speed limit of the Universe. Vortex electrons might also help us probe the curvature of spacetime on a microscopic scale.