Tailoring photonic entanglement in high-dimensional Hilbert spaces

Details Tailoring photonic entanglement in high-dimensional Hilbert spaces Tailoring photonic entanglement in high-dimensional Hilbert spaces

2003-09-05

arxiv.org/abs/quant-ph/0309058v2

Phys. Rev. A 69, 050304 (2004)

Physics

Quantum Physics

4 pages, 4 figures, published version

Scientific paper

10.1103/PhysRevA.69.050304

We present an experiment where two photonic systems of arbitrary dimensions can be entangled. The method is based on spontaneous parametric down conversion with trains of d pump pulses with a fixed phase relation, generated by a mode-locked laser. This leads to a photon pair created in a coherent superposition of $d$ discrete emission times, given by the successive laser pulses. Entanglement is shown by performing a two-photon interference experiment and by observing the visibility of the interference fringes increasing as a function of the dimension d. Factors limiting the visibility, such as the presence of multiple pairs in one train, are discussed.

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