= Leonard Mandel
{c}
{tag=Physicist}
= L. Mandel
{c}
{synonym}
An experimental <optical physicist> who coauthored the 1987 <Hong-Ou-Mandel effect> study. Interference of two down-converted <photons> allowed their relative timing to be inferred from coincidence counts. The experiment links the indistinguishability of quantum alternatives to a measured optical correlation, making two-<photon> interference a tool for precision measurement.<Measurement of Subpicosecond Time Intervals between Two Photons by Interference by C. K. Hong and others>[Abstract and beam-splitter coincidence measurement]{ref}
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