Beating Shot Noise Using Multi-Port Interferometers
Abstract
We have developed a theoretical framework to assess the metrological power of a reconfigurable multiport interferometer. This framework is a new formalism that can describe arbitrary linear setups using the Gaussian state technology, combined with the classical Fisher information studies. This framework revealed that earlier proposals based on boson sampling did not achieve any advantage with respect to conventional Gaussian interferometry, thereby shaking the foundations of this field and of our projects working hypothesis. In parallel to this work, motivated by the need to simulate large non-Gaussian problems, we have found a new toolkit of quantum-inspired algorithms and quantum computing algorithms for performing multivariate numerical analysis i.e. from solving partial differential equations to constructing and analyzing large multivariate probability distributions. This research activity has led to two scientific contributions (see items a) and b) in the List of Publications). Additionally, the CoBoSaME project has permitted to address other questions beyond the scope of its research program which has been collected in several preprints as well (see items c), d)and e)).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 25, 2021
- Accession Number
- AD1149579
Entities
People
- Juan J Garcia-ripoll
Organizations
- Spanish National Research Council