Distinguishability and "which pathway" information in multidimensional interferometric spectroscopy with a single entangled photon-pair.

ABSTRACT: Correlated photons inspire abundance of metrology-related platforms, which benefit from quantum (anti-) correlations and outperform their classical counterparts. While these mainly focus on entanglement, the role of photon exchange phase and degree of distinguishability has not been widely used in quantum applications. Using an interferometric setup, we theoretically show that, when a two-photon wave function is coupled to matter, it is encoded with “which pathway?” information even at low-degree of entanglement. An interferometric protocol, which enables phase-sensitive discrimination between microscopic interaction histories (pathways), is developed. We find that quantum light interferometry facilitates utterly different set of time delay variables, which are unbound by uncertainty to th

SUBMITTER: Asban S 

PROVIDER: S-EPMC8457662 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature