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Roy J. Glauber
Born	1 September 1925 (1925-09-01) (age 82) New York City, New York, USA
Residence	United States
Nationality	United States
Field	Physicist
Institutions	Harvard University
Alma mater	Harvard University
Academic advisor	Julian Schwinger
Notable students	Daniel Frank Walls
Known for	Photodetection, quantum optics
Notable prizes	Nobel Prize in Physics (2005)

Roy Jay Glauber (born 1 September 1925) is the Mallinckrodt Professor of Physics at Harvard University and Adjunct Professor of Optical Sciences at the University of Arizona. Born in New York City, he was awarded one half of the 2005 Nobel Prize in Physics "for his contribution to the quantum theory of optical coherence", with the other half shared by John L. Hall and Theodor W. Hänsch.

In this work, published in 1963, he created a model for photodetection and explained the fundamental characteristics of different types of light, such as laser light (see coherent state) and light from light bulbs (see blackbody). His theories are widely used in the field of quantum optics.

Glauber was born in 1925 in New York City, a member of the 1941 graduating class of the Bronx High School of Science, and went on to do his undergraduate work at Harvard University. After his sophomore year he was recruited to work on the Manhattan Project, where (at the age of 18) he was one of the youngest scientists at Los Alamos. His work involved calculating the critical mass for the atom bomb. After two years at Los Alamos, he returned to Harvard, receiving his bachelor's degree in 1946 and his PhD in 1949.

Glauber has received many honors for his research, including the A. A. Michelson Medal from the Franklin Institute in Philadelphia (1985), the Max Born Award from the Optical Society of America (1985), the Dannie Heineman Prize for Mathematical Physics from the American Physical Society (1996), and the 2005 Nobel Prize in Physics.

He is currently the Mallinkrodt Professor of Physics at Harvard University, where both past and present students enthusiastically praised his teaching to Harvard Crimson reporters.

Glauber has two children, a son and a daughter, and five grandchildren.

Roy Glauber's recent research has dealt with problems in a number of areas of quantum optics, a field which, broadly speaking, studies the quantum electrodynamical interactions of light and matter. He is also continuing work on several topics in high- energy collision theory, including the analysis of hadron collisions, and the statistical correlation of particles produced in high-energy reactions.

Specific topics of his current research include: the quantum mechanical behavior of trapped wave packets; interactions of light with trapped ions; atom counting-the statistical properties of free atom beams and their measurement; algebraic methods for dealing with fermion statistics; coherence and correlations of bosonic atoms near the Bose-Einstein condensation; the theory of continuously monitored photon counting-and its reaction on quantum sources; the fundamental nature of “quantum jumps”; resonant transport of particles produced multiply in high-energy collisions; the multiple diffraction model of proton-proton and proton-antiproton scattering.

R. J. Glauber, Quantum Theory of Optical Coherence. Selected Papers and Lectures, Wiley-VCH, Weinheim 2007. (A collection of reprints of Glauber's most important papers from 1963 to 1999, selected by the author.)

For many years before winning his Nobel Prize, Glauber was familiar to audiences of the Ig Nobel Prize ceremonies, where he took a bow each year as "Keeper of the Broom," sweeping the stage clean of the paper airplanes that have traditionally been thrown during the event.

• Glauber States: Coherent states of Quantum Harmonic Oscillator
• Roy J. Glauber at the Harvard Physics Department Faculty website
• The Nobel Prize in Physics 2005
• Dannie Heineman Prize 1996
• "Physics Professor Awarded Nobel", Harvard Crimson, October 5, 2005
• "Double Honours", Guardian, October 11, 2005
• NYC High Schools