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Antibunched photons emitted by a quantum point contact out of equilibrium | | C W J Beenakker
; H Schomerus
; | | Date: |
27 Aug 2004 | | Journal: | Phys Rev Lett, 93 (9), 096801 | | Abstract: | Motivated by the experimental search for "GHz nonclassical light," we identify the conditions under which current fluctuations in a narrow constriction generate sub-Poissonian radiation. Antibunched electrons generically produce bunched photons, because the same photon mode can be populated by electrons decaying independently from a range of initial energies. Photon antibunching becomes possible at frequencies close to the applied voltage V x e/variant Planck’s over 2pi, when the initial energy range of a decaying electron is restricted. The condition for photon antibunching in a narrow frequency interval below eV/variant Planck’s over 2pi reads [SigmanTn(1-Tn)]2<2Sigman[Tn(1-Tn)]2, with Tn an eigenvalue of the transmission matrix. This condition is satisfied in a quantum point contact, where only a single Tn differs from 0 or 1. The photon statistics is then a superposition of binomial distributions. | | Source: | PubMed, pmid15447122 | | Services: | Forum | Review | Favorites | |
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