Increasing the secret key rate of satellite-to-ground entanglement-based QKD assisted by adaptive optics

• URL: http://arxiv.org/abs/2411.09564v1
• Date: Thu, 14 Nov 2024 16:16:10 GMT
• Title: Increasing the secret key rate of satellite-to-ground entanglement-based QKD assisted by adaptive optics
• Authors: Valentina Marulanda Acosta, Daniele Dequal, Matteo Schiavon, Aurelie Montmerle-Bonnefois, Caroline B. Lim, Jean-Marc Conan, Eleni Diamanti,
• Abstract summary: Future quantum networks will be composed of both terrestrial links for metropolitan and continent-scale connections and space-based links for global coverage and infrastructure resilience. The propagation of quantum signals through the atmosphere is severely impacted by the effects of turbulence. This is even more the case for entanglement-based quantum communication protocols requiring two free-space channels to be considered simultaneously. We show in particular that this improves the performance of entanglement-based quantum key distribution by up to a few hundred bits per second when compared with the uncorrected scenario.
• Score: 0.48182159227299687
• License:
• Abstract: Future quantum networks will be composed of both terrestrial links for metropolitan and continent-scale connections and space-based links for global coverage and infrastructure resilience. However, the propagation of quantum signals through the atmosphere is severely impacted by the effects of turbulence. This is even more the case for entanglement-based quantum communication protocols requiring two free-space channels to be considered simultaneously. In this work, we assess the advantage of turbulence mitigation by adaptive optics, in particular during daytime link operation, so as to increase the coupling of the received signal into an optical fiber. We show in particular that this improves the performance of entanglement-based quantum key distribution by up to a few hundred bits per second when compared with the uncorrected scenario

Related papers

• Robustness of WDM technique for the co-propagation of quantum with classical signals in an optical fiber [1.6999370482438731]
  We study the evolution of co-propagating quantum and classical signals that are launched using WDM. calculations show that only the first two nearest channels from the classical channel experience noticeable crosstalk. This reflects the WDM technique is in principle robust in the integration of weak quantum links into classical data traffic.
  arXiv  Detail & Related papers  (2024-11-25T21:22:47Z)
• Towards efficient and secure quantum-classical communication networks [47.27205216718476]
  There are two primary approaches to achieving quantum-resistant security: quantum key distribution (QKD) and post-quantum cryptography (PQC) We introduce the pros and cons of these protocols and explore how they can be combined to achieve a higher level of security and/or improved performance in key distribution. We hope our discussion inspires further research into the design of hybrid cryptographic protocols for quantum-classical communication networks.
  arXiv  Detail & Related papers  (2024-11-01T23:36:19Z)
• Quantum Entanglement Distribution via Uplink Satellite Channels [41.94295877935867]
  Quantum satellites generate entangled pairs in space and distribute them to ground stations separated some distance away. reverse uplink case, where pairs are generated on the ground and swapped on the satellite using an optical Bell-measurement, has not been seriously considered.
  arXiv  Detail & Related papers  (2024-09-30T06:25:56Z)
• Predicting atmospheric turbulence for secure quantum communications in free space [0.4517077427559345]
  We train a Recurrent Neural Network, TAROCCO, to predict the turbulence strength within a free-space channel. The training is based on weather and turbulence data collected over 9 months for a 5.4 km intra-city free-space link across the City of Ottawa.
  arXiv  Detail & Related papers  (2024-06-20T22:38:13Z)
• Procrustean entanglement concentration in quantum-classical networking [0.605746798865181]
  We describe and experimentally implement Procrustean entanglement concentration for polarization-entangled states contaminated with classical light. We demonstrate our technique both on the tabletop and over a deployed quantum local area network, finding a substantial improvement of two-qubit entangled state fidelity.
  arXiv  Detail & Related papers  (2024-01-02T17:53:57Z)
• Learning Quantum Entanglement Distillation with Noisy Classical Communications [39.000858564696856]
  entanglement distillation aims to enhance the fidelity of entangled qubits through local operations and classical communication. Existing distillation protocols assume the availability of ideal, noiseless, communication channels. In this paper, we study the case in which communication takes place over noisy binary symmetric channels.
  arXiv  Detail & Related papers  (2022-05-17T18:10:16Z)
• Analysis of satellite-to-ground quantum key distribution with adaptive optics [0.0]
  Future quantum communication infrastructures will rely on both terrestrial and space-based links. We study the role of adaptive optics (AO) in this optimization.
  arXiv  Detail & Related papers  (2021-11-12T14:47:23Z)
• Optimal design and performance evaluation of free-space Quantum Key Distribution systems [0.0]
  We present a model of the performance of a free-space ground-to-ground quantum key distribution (QKD) system based on the efficient-BB84 protocol with active decoy states. We find that the channel fluctuation statistics must be considered to correctly estimate the effect of the saturation rate of the single-photon detectors.
  arXiv  Detail & Related papers  (2021-09-28T17:28:31Z)
• Towards fully-fledged quantum and classical communication over deployed fiber with up-conversion module [47.187609203210705]
  We propose and demonstrate a new method, based on up-conversion assisted receiver, for co-propagating classical light and QKD signals. Our proposal exhibits higher tolerance for noise in comparison to the standard receiver, thus enabling the distribution of secret keys in the condition of 4 dB-higher classical power.
  arXiv  Detail & Related papers  (2021-06-09T13:52:27Z)
• Entanglement Rate Optimization in Heterogeneous Quantum Communication Networks [79.8886946157912]
  Quantum communication networks are emerging as a promising technology that could constitute a key building block in future communication networks in the 6G era and beyond. Recent advances led to the deployment of small- and large-scale quantum communication networks with real quantum hardware. In quantum networks, entanglement is a key resource that allows for data transmission between different nodes.
  arXiv  Detail & Related papers  (2021-05-30T11:34:23Z)
• Path-encoded high-dimensional quantum communication over a 2 km multicore fiber [50.591267188664666]
  We demonstrate the reliable transmission over a 2 km long multicore fiber of path-encoded high-dimensional quantum states. A stable interferometric detection is guaranteed, allowing for low error rates and the generation of 6.3 Mbit/s of secret key rate.
  arXiv  Detail & Related papers  (2021-03-10T11:02:45Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.