Source of Single Photon State
Single photons are routinely generated using single emitters (atoms, Nitrogen-vacancy center, Quantum dot ). However, these sources are not always very efficient (low probability of actually getting a single photon on demand) and often complex and unsuitable out of a laboratory environment. Other sources are commonly used that overcome these issues at the expense of an nondeterministic behavior. Heralded single photon sources are probabilistic two-photon sources from whom the pair is split and the detection of one photon heralds the presence of the remaining one. These sources usually rely on the optical nonlinearity of some materials like periodically poled Lithium niobate (Spontaneous parametric down-conversion), or silicon (spontaneous Four-wave mixing) for example.
Read more about this topic: Fock State
Famous quotes containing the words source of, source, single and/or state:
“Knowledge is the most democratic source of power.”
—Alvin Toffler (b. 1928)
“By poeticizing love, we imagine in those we love virtues that they often do not possess; this then becomes the source of constant mistakes and constant distress.”
—Anton Pavlovich Chekhov (1860–1904)
“many and many a day he thither went,
And never lifted up a single stone.”
—William Wordsworth (1770–1850)
“Called on one occasion to a homestead cabin whose occupant had been found frozen to death, Coroner Harvey opened the door, glanced in, and instantly pronounced his verdict, “Deader ‘n hell!””
—For the State of Nebraska, U.S. public relief program (1935-1943)