Hectometer Revivals of Quantum Interference
Markus Rambach, W. Y. Sarah Lau, Simon Laibacher, Vincenzo Tamma,, Andrew G. White, and Till J. Weinhold
TL;DR
This paper demonstrates long-range quantum interference revivals using cavity-enhanced single photon sources that produce biphoton states with comb-like correlations, enabling interference over unprecedented path differences.
Contribution
It introduces a novel ultrabright source capable of emitting both biphoton and NOON states, achieving quantum interference revivals over 100 meters.
Findings
Revivals of Hong-Ou-Mandel interference up to the 84th dip.
Observation of single photon interference fringes with extended modulation range.
Generation of mode-locked biphoton states with comb-like correlation functions.
Abstract
Cavity-enhanced single photon sources exhibit mode-locked biphoton states with comb-like correlation functions. Our ultrabright source additionally emits either single photon pairs or two-photon NOON states, dividing the output into an even and an odd comb respectively. With even-comb photons we demonstrate revivals of the typical non-classical Hong-Ou-Mandel interference up to the 84th dip, corresponding to a path length difference exceeding 100 m. With odd-comb photons we observe single photon interference fringes modulated over twice the displacement range of the Hong-Ou-Mandel interference.
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