Exploring a multimode fibre for programming linear quantum networks
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Exploring a multimode fibre for programming linear quantum networks
Wed, 18/09/2019 - 14:30 to 15:30
Location:
Speaker:
Saroch Leedumrongwatthanajun
Affiliation:
Kastler-Brossel Laboratoire, École Normale Supérieure, Paris
Synopsis:
The ability to implement reconfigurable linear optical networks is a fundamental building block for the implementation of scalable quantum technologies. Currently, integrated linear optics are the most popular platforms to implement such networks. However, their scalability is significantly limited by the fabrication process, and they cannot be easy implementing across different photonic degrees of freedom. In this talk, I am going to present an alternative way to implement the networks in a multimode fibre by harnessing its complex connectivity involving spatial and polarization modes and an ability to control light propagation with wave-front shaping techniques. We experimentally demonstrate accuracy and robustness of the platform by manipulating deterministically two-photon interferences of various transformations, including the emulation of a tunable coherent absorption experiment. Additionally, I am going to present the use of our platform as a random projection for classification of states. By demonstrating reprogrammable, reliable, linear transformations, with the potential to scale to larger dimension in different photonic degrees of freedom, our results highlight the potential of complex media driven by wave-front shaping for quantum information processing.
Biography:
Saroch is currently a last-year graduate student under the supervision of Prof. Sylvain Gigan at the Complex Media Optics Lab, Kastler-Brossel Laboratoire, École Normale Supérieure, Paris. He earned his Bachelor degree in Physics at Prince of Songkla University, Thailand. In 2016, he obtained the Master degree in Photonics under the Erasmus Mundus programme named Molecular Nano- and Biophotonics (MONABIPHOT). During the two-year programme, he studied at École Normale Supérieure de Cachan, France, Complutense University of Madrid, Spain, University of Twente, the Netherlands, Wroclaw University of Technology, Poland and University of Cambridge, UK. His expertise is on the numerical modelling and the experimental control of wave propagation in complex systems. His current research focuses on harnessing large dimension of complex media for quantum applications. His general interest is in the physics of lights in complex environments from the viewpoint of information and thermodynamics and network theory.