Tamara Guarda & Raúl Barrachina
Centro Atómico Bariloche Comisión Nacional de Energía Atómica, Argentina
From basic courses to the most advanced applications of quantum theory, it is common to only deal with pure and therefore fully coherent states. But this complacency fails when it is necessary to consider classical uncertainties in mixed states. This relative lack of practice has permeated a recent debate on the possibility of changing the coherence conditions in atomic collision experiments .
In this web-based tool we employ a fully analytical model  which, unlike the usual techniques based on the numerical resolution of the time-dependent Schrödinger equation, allows for an instantaneous analysis of the quantum coherence conditions of a particle beam.
Please, before following the links at the bottom of the page (Plane wave, Wave packet and Beam), see any of these short videos for a simple explanation of this “coherence lab”.
- R. Barrachina, F. Navarrete, M. F. Ciappina and M. Schulz, “Coherence and contextuality in scattering experiments“, in “Ion-Atom Collisions: The Few-Body Problem in Dynamic Systems” (De Gruyter, 2019).
- R. Barrachina, F. Navarette and M. Ciappina, “Quantum coherence enfeebled by classical uncertainties” Physical Review Research 2, 043353 (2020).