Anti-symmetrization reveals hidden entanglement

Autor(en)

Alessandro Fedrizzi, Thomas Herbst, Markus Aspelmeyer, Marco Barbieri, Thomas Jennewein, Anton Zeilinger

Abstrakt

Two-photon anti-bunching at a beamsplitter is only possible if the photons are entangled in a specific state, anti-symmetric in the spatial modes. Thus, observation of anti-bunching is an indication of entanglement in a degree of freedom, which might not be easily accessible in an experiment. We experimentally demonstrate this concept in the case of the interference of two frequency-entangled photons with continuous frequency detunings. The principle of anti-symmetrization of the spatial part of a wavefunction and subsequent detection of hidden entanglement via anti-bunching at a beamsplitter may facilitate the observation of entanglement in other systems, like atomic ensembles or Bose–Einstein condensates. The analogue for fermionic systems would be to observe bunching.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW), University of Queensland

Journal

New Journal of Physics

Band

11

Anzahl der Seiten

9

ISSN

1367-2630

DOI

https://doi.org/10.1088/1367-2630/11/10/103052

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/de7bb111-fbe8-40d3-9d78-88f67b844209