Antibunched photons emitted by a quantum point contact out of equilibrium.

Beenakker, C. W. J. and Schomerus, Henning (2004) Antibunched photons emitted by a quantum point contact out of equilibrium. Physical review letters, 93 (9). 096801. ISSN 1079-7114

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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�e/, when the initial energy range of a decaying electron is restricted. The condition for photon antibunching in a narrow frequency interval below eV/hbar reads SUM_n[Tn(1�Tn)]2<2[SUM_n 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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
664
Deposited By:
Deposited On:
31 Oct 2007
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Apr 2020 01:42