Polarization entangled state measurement on a chip

Details Polarization entangled state measurement on a chip Polarization entangled state measurement on a chip

2010-09-13

arxiv.org/abs/1009.2426v1

Phys. Rev. Lett. 105, 200503 (2010)

Physics

Quantum Physics

Revtex, 5+2 pages (with supplementary information), 4+1 figures

Scientific paper

10.1103/PhysRevLett.105.200503

The emerging strategy to overcome the limitations of bulk quantum optics consists of taking advantage of the robustness and compactness achievable by the integrated waveguide technology. Here we report the realization of a directional coupler, fabricated by femtosecond laser waveguide writing, acting as an integrated beam splitter able to support polarization encoded qubits. This maskless and single step technique allows to realize circular transverse waveguide profiles able to support the propagation of Gaussian modes with any polarization state. Using this device, we demonstrate the quantum interference with polarization entangled states and singlet state projection.

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