Shaping spatial entanglement of photon-pairs

Filippo M. Miatto

Pauline Boucher, Hugo Defienne, Sylvain Gigan

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.

F. Zäh, Thomas Feurer

Ohad Lib, Giora Hasson, Yaron Bromberg

We compensate for scattering of pairs of spatially entangled photons from a dynamic diffuser, by tailoring the wavefront of the pump beam which generates the photon-pairs in a spontaneous parametric down conversion process.

Kai-ge, Wang, Liping +3 more

Pauline Boucher, Hugo Defienne, Sylvain Gigan

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, and measure them using an electron multiplying charge coupled device (EMCCD) camera. 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.