Demonstrating Feshbach resonances between a single ion and ultracold atoms


Dec 16, 2021

(Nanowerk Information) A workforce led by Prof. Dr. Tobias Schätz, Professor of Atomic and Quantum Physics on the Institute of Physics on the College of Freiburg, Dr. Pascal Weckesser, Fabian Thielemann and colleagues, display magnetic Feshbach resonances between a single barium ion and lithium atoms at close to absolute zero temperature. The researchers discovered that relying on the power of the exterior magnetic subject, the growth of the ion and atoms may be managed. “At these ultracold temperatures, the collisions between particles reveal their quantum mechanical nature,” explains Schätz. “Our analysis has proven that we’re studying a bit extra concerning the potentialities for controlling the quantum mechanical properties of wave-particle duality.” The group revealed their findings within the journal Nature (“Remark of Feshbach resonances between a single ion and ultracold atoms”). artistic impression of an individual ion interacting with several atoms with a wave-like character Inventive impression of a person ion interacting with a number of atoms with a wave-like character. (Picture: Ella Marushchenko)

Quantum results dominate at ultralow temperatures

In classical physics, the molecular formation of atoms and ions normally slows down with lowering temperature till it lastly will get so chilly that the person particles stand nonetheless and no collision or response can happen. Nevertheless, the legal guidelines of quantum physics predict that at ultralow temperatures, quantum results dominate relatively than classical legal guidelines, and the collision of atoms and ions immediately follows completely different guidelines. Within the quantum realm, the place the so-called wave-particle duality prevails, an ultracold temperature – simply above absolute zero at -273.15 levels Celsius – results in a rise in collision charges. The reason being that the particles can now not be described as colliding spheres, however as wave packets that may superimpose, amplify or cancel one another out like water waves.

Feshbach resonances regardless of stronger interplay

The superposition of the waves offers rise to resonances, which the Freiburg researchers studied. “Amongst different issues, we discovered Feshbach resonances between barium ions and lithium atoms by controlling their interplay processes with the assistance of a magnetic subject,” says Schätz. Feshbach resonances have beforehand been demonstrated in collisions of gradual atoms. Nevertheless, the analysis group was now in a position to take action in a considerably completely different regime of robust interplay prevalent because of the ion’s cost. Along with magnetic fields, the scientists used ultrahigh vacuum and cages made of sunshine of their laboratory to isolate the laser-cooled atoms and ions. “Primary analysis on quantum mechanics is now more and more leaving the lab and getting into the actual world. By finding out the consequences below idealized situations within the lab, we will higher perceive them and use them in a managed, wide-ranging manner – curiosity pushed and by the angle of controlling and growing the effectivity of chemical reactions, as much as discovering new methods for cost circulate in solids,” says Schätz.


Leave a Reply

Your email address will not be published. Required fields are marked *