Work

Creating and manipulating entangled optical qubits in the frequency domain

Year: 2014

Type: article

Abstract: Radio-frequency phase modulation of frequency-entangled photons leads to a two-photon interference pattern in the frequency domain. In recent experiments, the pattern was measured with narrow-band frequency filters which select photons belonging to a given frequency bin. Here we show how photons can be grouped into even and odd frequencies by using periodic frequency filters called interleavers. In our theoretical analysis we show how this reduces the high-dimensional photon state to an effective two-dimensional state. This is of interest for applications such as quantum cryptography or low-dimensional tests of quantum nonlocality. We then report an experimental realization of this proposal. The observed two-photon interference pattern and violation of the CHSH inequality---the simplest binary-outcome Bell inequality---are in good agreement with the theoretical predictions.

Source: Physical Review A

DOI: 10.1103/physreva.89.052323

Authors: Laurent Olislager, Erik Woodhead, Kien Phan Huy, Jean-Marc Merolla, Philippe Emplit, Serge Massar

Institutions: Université Libre de Bruxelles, Centre National de la Recherche Scientifique, Franche-Comté Électronique Mécanique Thermique et Optique - Sciences et Technologies, Université de Franche-Comté

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: Agence Nationale de la Recherche

Award: G125160087