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 , when the initial energy range of a decaying electron is restricted. The condition for photon antibunching in a narrow frequency interval below reads , with an eigenvalue of the transmission matrix. This condition is satisfied in a quantum point contact, where only a single differs from or . The photon statistics is then a superposition of binomial distributions.
- Received 2 May 2004
DOI:https://doi.org/10.1103/PhysRevLett.93.096801
©2004 American Physical Society