Towards fully-fledged quantum and classical communication over deployed fiber with up-conversion module

• URL: http://arxiv.org/abs/2106.05073v1
• Date: Wed, 9 Jun 2021 13:52:27 GMT
• Title: Towards fully-fledged quantum and classical communication over deployed fiber with up-conversion module
• Authors: Davide Bacco, Ilaria Vagniluca, Daniele Cozzolino, S{\o}ren M. M. Friis, Lasse H{\o}gstedt, Andrea Giudice, Davide Calonico, Francesco Saverio Cataliotti, Karsten Rottwitt, Alessandro Zavatta
• Abstract summary: 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.
• Score: 47.187609203210705
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum key distribution (QKD), the distribution of quantum secured keys useful for data encryption, is expected to have a crucial impact in the next decades. However, although the notable achievements accomplished in the last twenty years, many practical and serious challenges are limiting the full deployment of this novel quantum technology in the current telecommunication infrastructures. In particular, the co-propagation of quantum signals and high-speed data traffic within the same optical fiber, is not completely resolved, due to the intrinsic noise caused by the high intensity of the classical signals. As a consequence, current co-propagation schemes limit the amount of classical optical power in order to reduce the overall link noise. However, this ad-hoc solution restrains the overall range of possibilities for a large-scale QKD deployment. Here, we propose and demonstrate a new method, based on up-conversion assisted receiver, for co-propagating classical light and QKD signals. In addition, we compare the performances of this scheme with an off-the-shelf quantum receiver, equipped with a standard InGaAs detector, over different lengths of an installed fiber link. 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.

Related papers

• A practical transmitter device for passive state BB84 quantum key distribution [0.0]
  Preparation of quantum states within the transmitter device is a significant driver of both complexity and cost. A fully passive state preparation approach elegantly resolves these problems by combining state preparation and QRNG stages into a single optical instrument. We demonstrate our simplified transmitter by establishing a QKD link over a 10 km fiber, generating a secret key rate 110 bits/s.
  arXiv  Detail & Related papers  (2024-05-14T10:08:46Z)
• A Quantum-Classical Collaborative Training Architecture Based on Quantum State Fidelity [50.387179833629254]
  We introduce a collaborative classical-quantum architecture called co-TenQu. Co-TenQu enhances a classical deep neural network by up to 41.72% in a fair setting. It outperforms other quantum-based methods by up to 1.9 times and achieves similar accuracy while utilizing 70.59% fewer qubits.
  arXiv  Detail & Related papers  (2024-02-23T14:09:41Z)
• Metropolitan-scale Entanglement Distribution with Co-existing Quantum and Classical Signals in a single fiber [0.0]
  Development of prototype metropolitan-scale quantum networks involves transmitting quantum information via deployed optical fibers. One approach addressing these challenges is to co-propagate classical probe signals in the same fiber as the quantum signal. Here, we demonstrate the distribution of polarization entangled quantum signals co-propagating with the White Rabbit Precision Time Protocol (WR-PTP) classical signals in the same single-core fiber strand at metropolitan-scale distances.
  arXiv  Detail & Related papers  (2024-02-01T14:21:39Z)
• Eavesdropper localization for quantum and classical channels via nonlinear scattering [58.720142291102135]
  Quantum key distribution (QKD) offers theoretical security based on the laws of physics. We present a novel approach to eavesdropper location that can be employed in quantum as well as classical channels. We demonstrate that our approach outperforms conventional OTDR in the task of localizing an evanescent outcoupling of 1% with cm precision inside standard optical fibers.
  arXiv  Detail & Related papers  (2023-06-25T21:06:27Z)
• Twin-field quantum key distribution without phase locking [18.013181607967322]
  We show an approach to recover the single-photon interference pattern and realize TF-QKD emphwithout phase locking. Our work provides a scalable and practical solution to TF-QKD, thus representing an important step towards its wide applications.
  arXiv  Detail & Related papers  (2022-12-08T15:03:12Z)
• An Evolutionary Pathway for the Quantum Internet Relying on Secure Classical Repeaters [64.48099252278821]
  We conceive quantum networks using secure classical repeaters combined with the quantum secure direct communication principle. In these networks, the ciphertext gleaned from a quantum-resistant algorithm is transmitted using QSDC along the nodes. We have presented the first experimental demonstration of a secure classical repeater based hybrid quantum network.
  arXiv  Detail & Related papers  (2022-02-08T03:24:06Z)
• Operating Fiber Networks in the Quantum Limit [0.0]
  We show that a use of optimal quantum receivers allows an estimated $55%$ decrease in energy consumption of all-optical amplifiers in network configurations that are typical today. We find that quantum receiver technology allows for a logarithmic scaling of the system capacity with the baud-rate, while Shannon-type systems are limited by the transmit power.
  arXiv  Detail & Related papers  (2022-01-27T13:46:13Z)
• The limits of multiplexing quantum and classical channels: Case study of a 2.5 GHz discrete variable quantum key distribution system [0.0]
  We study the performance of a system running a simplified BB84 protocol at 2.5 GHz repetition rate. We discuss the performance of an ideal system under the same conditions. In this scenario we could exchange a secret key with a launch power up to 16.7 dBm in the classical channels.
  arXiv  Detail & Related papers  (2021-09-06T12:52:58Z)
• 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)
• Direct Quantum Communications in the Presence of Realistic Noisy Entanglement [69.25543534545538]
  We propose a novel quantum communication scheme relying on realistic noisy pre-shared entanglement. Our performance analysis shows that the proposed scheme offers competitive QBER, yield, and goodput.
  arXiv  Detail & Related papers  (2020-12-22T13:06:12Z)

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.