Multimode Fock states with large photon number: effective descriptions and applications in quantum metrology
Authors: Perarnau-Llobet, M.; Gonzalez-Tudela, A.; Cirac, J., I Contribution: Article Journal: QUANTUM SCIENCE AND TECHNOLOGY Publication date: 2020/03/01 DOI: 10.1088/2058-9565/ab6ce5 Abstract: We develop general tools to characterise and efficiently compute relevant observables of multimode N-photon states generated in nonlinear decays in one-dimensional waveguides. We then consider optical interferometry in a Mach-Zender interferometer where a d-mode photonic [...]