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Heralded creation of photonic qudits from parametric down-conversion using linear optics

Yoshikawa, Jun-ichi; Bergmann, Marcel; van Loock, Peter; Fuwa, Maria; Okada, Masanori; Takase, Kan; Toyama, Takeshi; Makino, Kenzo; Takeda, Shuntaro; Furusawa, Akira


We propose an experimental scheme to generate, in a heralded fashion, arbitrary quantum superpositions of two-mode optical states with a fixed total photon number n based on weakly squeezed two-mode squeezed state resources (obtained via weak parametric down-conversion), linear optics, and photon detection. Arbitrary d-level (qudit) states can be created this way where d = n + 1. Furthermore, we experimentally demonstrate our scheme for n = 2. The resulting qutrit states are characterized via...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: Physical Review A
DOI: 10.1103/PhysRevA.97.053814
Access Rights: Open Access


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