Theory of Nonclassical States of Light
Contributors: V.V. Dodonov (Editor); V.I. Man'ko (Editor)
Publisher: CRC
Published: June 2002
Language: eng
Number of pages: 384
ISBN-13: 9780415284134
First sentence: In modern monographs on quantum optics [1] the "nonclassical" states of the electromagnetic field are defined as those for which the so called Glauber-Sudarshan P-function (used by Glauber [2] to represent only thermal states and introduced by Sudarshan [3] for arbitrary density matrices) "is less well behaved than a probability density", e.g., takes on negative values and becomes more singular than a delta function.