GHz-Pulsed Source of Entangled Photons for Reconfigurable Quantum
Networks
- URL: http://arxiv.org/abs/2201.08799v1
- Date: Fri, 21 Jan 2022 17:52:52 GMT
- Title: GHz-Pulsed Source of Entangled Photons for Reconfigurable Quantum
Networks
- Authors: Meritxell Cabrejo Ponce, Andr\'e Luiz Marques Muniz, Philippe Ancsin,
Christopher Spiess, Fabian Steinlechner
- Abstract summary: Entanglement is a universal resource in quantum networks, yet entangled photon sources are typically custom-made for a specific use case.
Here, we report on a flexible source design that produces high-quality entanglement in continuous-wave and GHz-rate-pulsed operation modes.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Entanglement is a universal resource in quantum networks, yet entangled
photon sources are typically custom-made for a specific use case. Versatility,
both in terms of state modulation and tunability of the temporal properties of
the photons, is the key to flexible network architectures and cryptographic
primitives that go beyond quantum key distribution. Here, we report on a
flexible source design that produces high-quality entanglement in
continuous-wave and GHz-rate-pulsed operation modes. Utilizing off-the-shelf
optical components, our approach uses a fiber-based Sagnac loop to generate
polarization-entangled photons at telecom wavelength with high efficiency and
fidelities above 0.99. Phase modulation up to GHz before entangled state
generation is also possible for fast entangled state switching. We show phase
modulation at 100 MHz with an average fidelity of 0.95. Furthermore, the source
60 nm spectral bandwidth is entirely compatible with fully reconfigurable
wavelength-multiplexed quantum networks.
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