The Electron's Heel: What Dirac Knew and Pauli Missed ⚡ экспресс
Original: "Time inversion symmetry in the Dirac and Schrödinger-Pauli theories"
In a magnetized material, electrons always drift sideways—even if you ignore the spin’s effect on their trajectory.
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In a chunk of magnet, electrons always skid a little around bends, even without an external field. Dirac predicted this effect almost a century ago, but it was thought unimportant at low speeds. It turns out the path curvature is built into the particle itself—and this heralds new magnetic electronics without bulky magnets.
🎯 Discovered over a century ago, the effect long remained a mystery; only recently was it found that the answer lies hidden in Dirac’s equations—and this "heel" is fundamental even for stationary particles.
\Omega = \frac{1}{2m^2c^2}
intrinsic Berry curvature for the electron: m is mass, c is the speed of light