Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

International Conference on Quantum Information

The Optical Parametric Oscillator: a Bright and Colorful Entangler

A. S. Coelho, F. A. S. Barbosa, A. J. de Faria, K. N. Cassemiro, Alessandro S. Villar, M. Martinelli, P. Nussenzveig

Published Jan 1, 2011• 0 citations
Publisher

Abstract

We describe the direct generation of tripartite three-color entanglement from a single optical parametric oscillator. The robustness of bipartite and tripartite entanglement against losses is also experimentally investigated.
DOI
10.1364/icqi.2011.qtuh3

Related papers

Bright Entangled Beams from an Above-Threshold Optical Parametric Oscillator

K. N. Cassemiro, Alessandro S. Villar, Paulo Valente +2 more

We generated bright entangled beams in an optical parametric oscillator, operating above threshold. Tripartite pump-signal-idler entanglement, all with different frequencies, was also predicted and three-color quantum correlations already measured.

The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting•Jan 1, 2007•1 citation

Multicolor Continuous-Variable Entanglement

A. S. Coelho, F. A. S. Barbosa, K. N. Cassemiro +3 more

Direct generation of tripartite entanglement between pump, signal, and idler beams of an above-threshold optical parametric oscillator was implemented. All three bright beams of light have different wavelengths. Partial-loss disentanglement was also observed.

Latin America Optics and Photonics Conference•Jan 1, 2010•0 citations

Entanglement among bright light beams: Creation, structure, sudden death

Alessandro S. Villar, F. A. S. Barbosa, A. S. Coelho +3 more

The possibility to generate multipartite entanglement in the laboratory allows further investigations of the structure of quantum correlations among many parties. We employ the optical parametric oscillator to directly produce three entangled bright beams of light and study their properties. In this tripartite continuous system, we observe a mixture of behaviours common to discrete systems pertaining to both the GHZ and the W classes of tripartite entangled states.

Rio De La Plata Workshop on Laser Dynamics and Nonlinear Photonics•Dec 1, 2011•0 citations

Triple Quantum Correlations from an Above-Threshold Optical Parametric Oscillator

K. N. Cassemiro, Alessandro S. Villar, M. Martinelli +1 more

We measured triple quantum correlations between the bright beams in an optical parametric oscillator, operating above threshold. Owing to extra noise in the system, still unaccounted for, tripartite entanglement is yet to be demonstrated.

International Conference on Quantum Information•Jan 1, 2008•0 citations

Structure of tripartite entanglement among light beams

Alessandro S. Villar, F. A. S. Barbosa, A. S. Coelho +3 more

We experimentally investigate quantum entanglement among three beams of light produced by the optical parametric oscillator. We aim to understand how entanglement is distributed among the light beams and associated optical sideband field modes.

Frontiers in Optics•Jan 1, 2012•0 citations

Bright tripartite entanglement in triply concurrent parametric oscillation

Ashton S. Bradley, M. K. Olsen, Olivier Pfister +1 more

We show that an optical parametric oscillator based on three concurrent ${\ensuremath{\chi}}^{(2)}$ nonlinearities can produce, above threshold, bright output beams of macroscopic intensities which exhibit strong tripartite continuous-variable entanglement. We also show that there are two ways that the system can exhibit a three-mode form of the Einstein-Podolsky-Rosen paradox, and calculate the extracavity fluctuation spectra that may be measured to verify our predictions.

arXiv:quant-ph/0505131•Physical Review A•Nov 4, 2005•77 citations