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Restoring and tailoring very high dimensional spatial entanglement of a biphoton state transmitted through a scattering medium
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We report experimental results where a momentum entangled biphoton state with a giant dimensionality of 8000 is retrieved and manipulated when only one photon of the pair is transmitted through a thin scattering medium. For this purpose, the transmission matrix of the complex medium is first measured with a phase-shifting interferometry measurement method using a spatial light modulator (SLM) illuminated with a laser source. From this matrix, different phase masks are calculated and addressed on the SLM to spatially control the focusing of the laser through the complex medium. These same masks are used to manipulate the phase of the biphoton wave function transmitted by the thin diffuser in order to restore and control in the same way the momentum correlations between the far-field images of twin beams issued from strongly spatial-multi-mode spontaneous parametric down conversion.
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Cited by 3 Pith papers
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Wavefront correction of high-dimensional two-photon states via coherence-entanglement transfer
A two-photon source in a low-entanglement configuration measures the transmission matrix of a scattering medium, and the same correction then restores correlations of a high-dimensional entangled state.
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Rapid and efficient wavefront correction for spatially entangled photons using symmetrized optimization
sGA, a symmetry-constrained genetic algorithm that optimizes only the even-parity part of the wavefront, corrects two-photon correlations after a diffuser four times faster and up to 38% better than standard GA in one...
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Partial-immunity of two-photon correlation against wavefront distortion for spatially entangled photons
Two-photon spatial correlations are affected only by the even-parity component of far-field phase distortion, so odd-parity disorder can be ignored in wavefront correction.
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