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 practice of S/M is the creation of pleasure.... And thats why S/M is really a subculture. Its a process of invention. S/M is the use of a strategic relationship as a source of pleasure.”
—Michel Foucault (19261984)
“The act of birth is the first experience of anxiety, and thus the source and prototype of the affect of anxiety.”
—Sigmund Freud (18561939)
“A continual feast of commendation is only to be obtained by merit or by wealth: many are therefore obliged to content themselves with single morsels, and recompense the infrequency of their enjoyment by excess and riot, whenever fortune sets the banquet before them.”
—Samuel Johnson (17091784)
“When the Revolutionaries ran short of gun wadding the Rev. James Caldwell ... broke open the church doors and seized an armful of Watts hymnbooks. The preacher threw them to the soldiers and shouted, Give em Watts, boysgive em Watts!”
—For the State of New Jersey, U.S. public relief program (1935-1943)