Spatial entanglement engineering by pump shaping
Pauline Boucher, Hugo Defienne, Sylvain Gigan
TL;DR
This paper demonstrates how shaping the pump beam profile in spontaneous parametric down-conversion allows for tunable control of high-dimensional spatial entanglement, advancing quantum information processing capabilities.
Contribution
It introduces a method to engineer spatial correlations of photon pairs through pump shaping, enabling customizable high-dimensional entangled states.
Findings
Spatial correlations can be tuned without affecting intensity.
Pump shaping controls high-dimensional spatial entanglement.
Potential for enhanced quantum information applications.
Abstract
The ability to engineer the properties of quantum optical states is essential for quantum information processing applications. Here, we demonstrate tunable control of spatial correlations between photon pairs produced by spontaneous parametric down-conversion. By shaping the spatial pump beam profile in a type-I collinear configuration, we tailor the spatial structure of coincidences between photon pairs entangled in high dimensions, without effect on intensity. The results highlight fundamental aspects of spatial coherence and hold potential for the development of quantum technologies based on high-dimensional spatial entanglement.
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Taxonomy
TopicsOrbital Angular Momentum in Optics · Quantum Information and Cryptography · Neural Networks and Reservoir Computing