Illinois Researchers Quantify Limits of Chiral Molecular Discrimination

Researchers at the University of Illinois at Urbana-Champaign have established quantitative error bounds for identifying chiral molecules, those existing as non-superimposable mirror images of each other, a challenge of central importance across the molecular sciences. The work, affiliated with the Illinois Quantum Information Science and Technology Center (IQUIST) and the Center for Biophysics and Quantitative Biology, demonstrates that a collective measurement on photons can provide an orders-of-magnitude improvement in error rate when classifying the “handedness” of these molecules, compared to standard measurement techniques. This advance analyzes the process as a statistical inference problem, rigorously assessing the limits of chiroptical discrimination. The researchers find that even with a perfect molecule exhibiting strong chiral interaction, approximately 4 of every 10 photons absorbed or…