Correlated‐Photon Metrology Without Absolute Standards

JAN 01, 1999

The quantum correlation of paired photons produced in nonlinear optical crystals promises metrologists something of a free lunch: absolute measurements that don’t require absolute standards.

DOI: 10.1063/1.882570

Alan Migdall

Just like human twins who evoke amazement and a ense of mystery by reporting empathetic experiences across great distances, photons born in pairs also astonish us by their quantum‐correlated behavior.

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More about the Authors

Alan Migdall. National Institute of Standards and Technology, Gaithersburg, Maryland.