Angular Schmidt Modes in Spontaneous Parametric Down-Conversion

Details Angular Schmidt Modes in Spontaneous Parametric Down-Conversion Angular Schmidt Modes in Spontaneous Parametric Down-Conversion

2011-03-21

arxiv.org/abs/1103.4077v1

Phys. Rev. A 83, 060302(R) (2011)

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevA.83.060302

We report a proof-of-principle experiment demonstrating that appropriately chosen set of Hermite-Gaussian modes constitutes a Schmidt decomposition for transverse momentum states of biphotons generated in the process of spontaneous parametric down conversion. We experimentally realize projective measurements in Schmidt basis and observe correlations between appropriate pairs of modes. We perform tomographical state reconstruction in the Schmidt basis, by direct measurement of single-photon density matrix eigenvalues.

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