Experimental filtering of two-, four-, and six-photon singlets from a single parametric down-conversion source
- 5 October 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 80 (4), 040302
- https://doi.org/10.1103/physreva.80.040302
Abstract
Invariant entangled states remain unchanged under simultaneous identical unitary transformations of all their subsystems. We experimentally generate and characterize such invariant two-, four-, and six-photon polarization entangled states. This is done only with a suitable filtering procedure of multiple emissions of entangled photon pairs from a single source without any interferometric overlaps. We get the desired states utilizing bosonic emission enhancement due to indistinguishability. The setup is very stable and gives high interference contrasts. Thus, the process is a very likely candidate for various photonic demonstrations of quantum information protocols.Keywords
This publication has 13 references indexed in Scilit:
- Interference contrast in multisource few-photon opticsJournal of Physics B: Atomic, Molecular and Optical Physics, 2009
- Experimentally Friendly Geometrical Criteria for EntanglementPhysical Review Letters, 2008
- Six-qubit permutation-based decoherence-free orthogonal basisPhysical Review A, 2007
- Experimental entanglement of six photons in graph statesNature Physics, 2007
- Experimental Demonstration of Four-Party Quantum Secret SharingPhysical Review Letters, 2007
- Bell’s Inequalities and Quantum Communication ComplexityPhysical Review Letters, 2004
- Decoherence-Free Quantum Information Processing with Four-Photon Entangled StatesPhysical Review Letters, 2004
- Quantum secret sharingPhysical Review A, 1999
- Three-Particle Entanglements from Two Entangled PairsPhysical Review Letters, 1997
- Entangling Photons Radiated by Independent Pulsed SourcesaAnnals of the New York Academy of Sciences, 1995