Approaching the quantum limit of precision in absorbance estimation using classical resources
Euan J. Allen, Javier Sabines-Chesterking, Alex R. McMillan, Siddarth Koduru Joshi, Peter S. Turner, Jonathan C. F. Matthews · Physical Review Research · 2020
This work investigates precision bounds in absorbance sensing via the Beer-Lambert law for quantum and classical sources of light. The authors find that by optimizing the length of the sample, classical sources of light are able to reach within 83% of the absolute quantum limit in precision. A bulk optical experiment is used to demonstrate optimization of thermal and Fock states of light