Towards a spectrally multiplexed quantum repeater
- URL: http://arxiv.org/abs/2205.10028v2
- Date: Thu, 7 Dec 2023 06:08:57 GMT
- Title: Towards a spectrally multiplexed quantum repeater
- Authors: Tanmoy Chakraborty, Antariksha Das, Hedser van Brug, Oriol
Pietx-Casas, Peng-Cheng Wang, Gustavo Castro do Amaral, Anna L. Tchebotareva,
Wolfgang Tittel
- Abstract summary: Extended quantum networks are based on quantum repeaters that often rely on entanglement in an efficient and heralded fashion over multiple network nodes.
Many repeater architectures require multiplexed sources of entangled photon pairs, multiplexed quantum memories, and photon detection that distinguishes between the multiplexed modes.
Here we demonstrate the concurrent employment of (1) spectrally multiplexed cavity-enhanced spontaneous parametric down-conversion in a nonlinear crystal; (2) a virtually-imaged phased array that enables mapping of spectral modes onto distinct spatial modes for frequency-selective detection; and (3) a cryogenically cooled Tm3+:LiNbO3 crystal that allows spectral filtering
- Score: 16.67624046004553
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Extended quantum networks are based on quantum repeaters that often rely on
the distribution of entanglement in an efficient and heralded fashion over
multiple network nodes. Many repeater architectures require multiplexed sources
of entangled photon pairs, multiplexed quantum memories, and photon detection
that distinguishes between the multiplexed modes. Here we demonstrate the
concurrent employment of (1) spectrally multiplexed cavity-enhanced spontaneous
parametric down-conversion in a nonlinear crystal; (2) a virtually-imaged
phased array that enables mapping of spectral modes onto distinct spatial modes
for frequency-selective detection; and (3) a cryogenically cooled Tm3+:LiNbO3
crystal that allows spectral filtering in an approach that anticipates its use
as a spectrally-multiplexed quantum memory. Through coincidence measurements,
we demonstrate quantum correlations between energy-correlated photon pairs and
a strong reduction of the correlation strength between all other photons. This
constitutes an important step towards a frequency multiplexed quantum repeater.
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