Work

Role of indistinguishability and entanglement in Hong-Ou-Mandel interference and finite-bandwidth effects of frequency-entangled photons

Year: 2023

Type: article

Abstract: We investigate the relation between indistinguishability and quantum entanglement in Hong-Ou-Mandel interference experiments theoretically and relate these quantum mechanical principles to the theorem of entanglement monogamy. Employing Glauber's theory of quantum coherence we compute the detection statistics in HOM interference of frequency-entangled photons and find an additional term in the coincidence detection probability, which is related to the spectral indistinguishability of the considered photons that arises from finite-bandwidth effects and therefore is relevant in the limit of low-frequency separations or large single-photon bandwidths. Compared to previous work in that context we treat all photonic degrees of freedom on equal footing.

Source: Physical Review A

DOI: 10.1103/physreva.107.032205

Authors: Roy Barzel, Claus Lämmerzahl

Institutions: University of Bremen, Carl von Ossietzky Universität Oldenburg, Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: Deutsche Forschungsgemeinschaft

Awards: SFB 1464: Relativistische und quantenbasierte Geodäsie (TerraQ), G40493870, EXC 2123: QuantumFrontiers Licht und Materie an der Quantengrenze, G564235600, G745383156