In this paper we address the problem of optimizing an unbalanced Mach-Zehnder interferometer, for a given pure input state and considering specific detection scheme. While optimum transmission coefficient first beam splitter can be uniquely determined via quantum Fisher information only [Phys. Rev. A 105, 012604 (2022)], second is detection-scheme dependent, too. We systematically give analytic...

On-chip high extinction ratio Mach-Zehnder interferometers (MZI) have always attracted interest from researchers as it can be used in many applications including astrophotonics, optical switching, programmable photonic circuit, and quantum information. However, previous research studies, ultra-high on-chip MZIs only been achieved by using a multi-stage MZI approach. In this paper, we investigat...

Abstract In this work we address the problem of phase sensitivity optimization for an unbalanced Mach-Zehnder interferometer. While quantum Fisher information can be employed in order to obtain optimum transmission coefficient first beam splitter, is no longer true second one, whose detection-scheme dependent. We thus consider three commonly used detection schemes and provide optimal solution e...