Multi-qubit production in spontaneous parametric down conversion
Phillip Heitert, Finn Buldt, Pascal Bassène, Moussa Ibra Ngom · Frontiers in Optics + Laser Science 2021 · 2021
We present a novel yet simple approach to produce multiple entangled photon pairs through spontaneous parametric down conversion (SPDC). We have designed Gaussian masks to subdivide the pump beam before passing it through a nonlinear medium. In this way, we are able to observe simultaneous separate down converted emission cones with spatial overlap. The technique we employ can be used to greatly increase the dimensionality of entangled photonic systems generated from spontaneous parametric down conversion, affording greater scalability to optical quantum computing than previously explored.