Vortices in the Ocean of Vacuum: How Spin Dictates the Birth of Matter ⚡ экспресс
The study reveals how the delay between two laser pulses controls the birth of electron-positron pairs from the quantum vacuum. At zero delay, interference patterns form, but at a delay of G=0.5, quantized vortex lattices emerge, resembling the classic Kármán vortex street. It turns out that the spin of the particles dictates the topology of their distribution in momentum space: parallel spins yield a dipole pattern, antiparallel spins a quadrupole one, linked to the conservation of total angular momentum. Despite chaos at larger delays, these spin 'fingerprints' remain robust, offering a precise diagnostic tool for vacuum excitations in strong-field quantum electrodynamics.
According to the Standard Model, the vacuum is not emptiness but an ocean of virtual ghost particles. An ultra-strong electromagnetic field, like a storm, yanks electron-positron pairs into reality.
By controlling the delay between two laser flashes, you can get either chaotic ripples or orderly vortex lattices — like whirlpools behind a rock in a river.
The shape of these whirlpools is dictated by spin — the intrinsic rotation of particles, like a tiny spinning top. An electron and positron spinning in the same direction create a two-pole vortex; in opposite directions, a four-lobed pattern. This makes the vortices an ultrasensitive spectroscopic detector.
Amazingly, even when vortices break down and entropy (a measure of disorder) grows, the spin signature remains, like a fingerprint on water. The discovery, building on the ideas of Schwinger, Dirac, and Feynman, allows the study of extreme matter.
🎯 The most powerful lasers still can't reach the Schwinger limit — the field capable of birthing pairs from absolute emptiness. However, the trick of colliding pulses lets us see this effect without waiting for record-breaking powers.