Ricerc@Sapienza

The quantum interference represents an essential resource for the quantum simulation, the characterization of the quantumness of a system, and the achievement of the quantum advantage. The peculiar characteristics of quantum interference are due to quantum superposition and bosonic coalescence, which can be explained only by using the rules of quantum mechanics. The quantum superposition is particularly exploited in Quantum Walks (QWs) experiments. The QWs can be performed in several photonic architectures to simulate quantum phenomena like decoherence in presence of disorder, quantum transport, the evolution of bosonic and fermionic particles. The bosonic coalescence is the core of the Boson Sampling problem, which is the best candidate to prove the quantum advantage over classical computation. Indeed, the calculation of Boson Sampling distribution is a hard computational task for a classical computer, which can be accomplished by a rudimental quantum computer.
This project's aim is to create an innovative platform feasible for the realization of two-dimensional QW and multimode Boson Sampling experiments. The novelty of the platform is given by a new device, the G-plate, designed by Lorenzo Marrucci's research group of the University of Naples "Federico II". Such a device allows one to obtain quantum interference in the transverse momentum of light on a scalable platform. In order to improve the precision of the apparatus, we need to reduce the photon losses in the detection. This could be achieved by coupling the photon in the 2D fiber array using a coated microlens array mounted on high precision support. We strongly believe that endowing our experimental setup with such a device would significantly improve our current and future results.