Bright, low-noise source of single photons at 780 nm with improved
phase-matching in rubidium vapor
- URL: http://arxiv.org/abs/2301.06049v2
- Date: Mon, 3 Jul 2023 08:46:21 GMT
- Title: Bright, low-noise source of single photons at 780 nm with improved
phase-matching in rubidium vapor
- Authors: Omri Davidson, Ohad Yogev, Eilon Poem, Ofer Firstenberg
- Abstract summary: We demonstrate a bright multiplexed source of indistinguishable single photons with tunable GHz-bandwidth based on four-wave-mixing in rubidium vapor.
The new implementation employs a frequency-detuning regime that is better phase matched, a spatial-alignment procedure using single-mode fibers, a different rubidium isotope, and higher vapor-cell transmission.
Our source produces single photons with detected efficiency of over 20%, Hong-Ou-Mandel interference visibility of 88%, generation rate of over 100 kilo-counts per second, and signal-to-noise ratio greater than 100, making it suitable for quantum information
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Future optical quantum networks could benefit from single photons that couple
well to atoms, for realizing, e.g., quantum memories and deterministic photonic
gates. However, the efficient generation of such photons remains a difficult
challenge. Recently, we demonstrated a bright multiplexed source of
indistinguishable single photons with tunable GHz-bandwidth based on
four-wave-mixing in rubidium vapor [Davidson et al. 2021 New J. Phys. 23
073050]. Here we report on an improved implementation of this photon source.
The new implementation employs a frequency-detuning regime that is better phase
matched, a spatial-alignment procedure using single-mode fibers, a different
rubidium isotope, and higher vapor-cell transmission. Characterization of the
source is performed using superconducting-nanowire detectors with higher
detection efficiency and lower jitter. Our source produces single photons with
detected heralding efficiency of over 20%, Hong-Ou-Mandel interference
visibility of 88%, generation rate of over 100 kilo-counts per second, and
signal-to-noise ratio greater than 100, making it suitable for quantum
information processing with photons.
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