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Updated: Aug 16, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Pixel entanglement: experimental realization of optically entangled d=3 and d=6 qudits
Malcolm N O'Sullivan-Hale1, Irfan Ali Khan, Robert W Boyd
1The Institute of Optics, University of Rochester, Rochester, NY 14627, USA. osulliva@optics.rochester.edu
Abstract:
We demonstrate a simple experimental method for creating entangled qudits. Using transverse-momentum and position entanglement of photons emitted in spontaneous parametric down-conversion, we show entanglement between discrete regions of space, i.e., pixels. We map each photon onto as many as six pixels, where each pixel represents one level of our qudit state. The method is easily generalizable to create even higher dimensional, entangled states. Thus, the realization of quantum information processing in arbitrarily high dimensions is possible, allowing for greatly increased information capacity.
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