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:
“The particular source of frustration of women observing their own self-study and measuring their worth as women by the distance they kept from men necessitated that a distance be kept, and so what vindicated them also poured fuel on the furnace of their rage. One delight presumed another dissatisfaction, but their hatefulness confessed to their own lack of power to please. They hated men because they needed husbands, and they loathed the men they chased away for going.”
—Alexander Theroux (b. 1940)
“The source of all life and knowledge is in man and woman, and the source of all living is in the interchange and the meeting and mingling of these two: man-life and woman-life, man-knowledge and woman-knowledge, man-being and woman-being.”
—D.H. (David Herbert)
“The art of leadership ... consists in consolidating the attention of the people against a single adversary and taking care that nothing will split up that attention.... The leader of genius must have the ability to make different opponents appear as if they belonged to one category.”
—Adolf Hitler (1889–1945)
“Mother,
each time I talk to God
you interfere.
You of the bla-bla set,
carrying on about the state of letters.”
—Anne Sexton (1928–1974)