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Paper detail

Quantum Absorbance Estimation and the Beer-Lambert Law

The utility of transmission measurement has made it a target for quantum enhanced measurement strategies. Here we find if the length of an absorbing object is a controllable variable, then via the Beer-Lambert law, classical strategies can be optimised to reach within 83% of the absolute quantum limit. Our analysis includes experimental losses, detector noise, and input states with arbitrary photon statistics. We derive optimal operating conditions for both classical and quantum sources, and observe experimental agreement with theory using Fock and thermal states.

preprint2019arXivOpen access
Euan J. AllenJavier Sabines-ChesterkingAlex McMillanSiddarth K. JoshiPeter S. TurnerJonathan C. F. Matthews
physics.opticsquant-ph
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Euan J. AllenJavier Sabines-ChesterkingAlex McMillanSiddarth K. JoshiPeter S. TurnerJonathan C. F. Matthews

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