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Polarization Entangled State Measurement on a Chip

Linda Sansoni, Fabio Sciarrino, Giuseppe Vallone, Paolo Mataloni, Andrea Crespi, Roberta Ramponi, and Roberto Osellame
Phys. Rev. Lett. 105, 200503 – Published 10 November 2010
Physics logo See Synopsis: Towards a handheld optical table
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Abstract

The emerging strategy to overcome the limitations of bulk quantum optics consists of taking advantage of the robustness and compactness achievable by 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 us to realize circular transverse waveguide profiles which are able to support the propagation of Gaussian modes with any polarization state. Using this device, we demonstrate quantum interference with polarization-entangled states and singlet state projection.

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  • Received 18 June 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.200503

© 2010 The American Physical Society

Synopsis

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Towards a handheld optical table

Published 10 November 2010

A new optical component for integrated photonic circuits could prove helpful for applications that store and transmit the information contained in linearly polarized light.

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Authors & Affiliations

Linda Sansoni1, Fabio Sciarrino1,2, Giuseppe Vallone3,1, Paolo Mataloni1,2, Andrea Crespi4,5, Roberta Ramponi4,5, and Roberto Osellame4,5

  • 1Dipartimento di Fisica, Sapienza Universitá di Roma, I-00185 Roma, Italy
  • 2Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (INO-CNR), Largo Enrico Fermi 6, I-50125 Firenze, Italy
  • 3Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Via Panisperna 89/A, Compendio del Viminale, I-00184 Roma, Italy
  • 4Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche (IFN-CNR), Piazza Leonardo da Vinci, 32, I-20133 Milano, Italy
  • 5Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci, 32, I-20133 Milano, Italy

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Issue

Vol. 105, Iss. 20 — 12 November 2010

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