Entanglement Born in Collisions ⚡ экспресс
In quantum physics, entanglement is when the properties of particles become interconnected. The authors showed that molecular collisions produce different kinds of entanglement: between discrete levels, continuous states of motion, and their hybrids. They developed a general method for quantifying such entanglement from scattering matrix elements and discovered a new class of 'hybrid cat states'—multimode states that simultaneously live in multiple realities. By controlling a magnetic field near Feshbach resonances, one can precisely control the generation of entanglement, which is important for quantum computing with molecules.
In the quantum world, collisions don't destroy particles but weave them into an unbreakable knot: internal states and motions become entangled like threads. Scientists have developed a universal method to measure this entanglement directly from collision data.
Entanglement can be discrete (like knots on a rope), continuous (smooth loops), or hybrid — a multi-layered tangle reminiscent of Schrödinger's cat in a dozen boxes. To describe it, scientists used an approach proposed by John Wheeler for nuclear reactions.
Using spectroscopy of magnetic resonances, researchers showed that a weak magnetic field can turn entanglement on and off in ultracold collisions (such as rubidium with strontium fluoride). Even in an ordinary reaction of fluorine with hydrogen, the products are born entangled. Chemical reactions become factories of quantum knots for future technologies.
🎯 At ultralow temperatures, molecules move slower than a pedestrian, and a collision that births a quantum knot stretches over milliseconds—an eternity in the micro-world.
🎬 Controlled quantum knots are the foundation of fantastical technologies: from instant communication to teleportation, as in Star Trek.