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 [1].

In this web-based tool we employ a fully analytical model [2] 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».

32nd International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) – July 20-23, 2021
International Symposium on Correlation, Polarization and Ionization in Atomic and Molecular Collisions (COPIAMC) – July 28-29, 2021
Plane Wave
Wave Packet
  1. R. Barrachina, F. Navarette and M. Ciappina, «Quantum coherence enfeebled by classical uncertainties» Physical Review Research 2, 043353 (2020).