Emulation of satellite up-link quantum communication with entangled photons

• URL: http://arxiv.org/abs/2502.03556v1
• Date: Wed, 05 Feb 2025 19:14:55 GMT
• Title: Emulation of satellite up-link quantum communication with entangled photons
• Authors: Thomas Jaeken, Alexander Pickston, Faris Redza, Thomas Jennewein, Alessandro Fedrizzi,
• Abstract summary: We demonstrate an ultra-bright source of far-non-degenerate entangled photons and perform quantum key distribution in emulated high-loss satellite scenarios. With a loss profile corresponding to that of one of the pioneering Micius up-link experiments, and a terrestrial end user separated by 10km of telecom fibre we achieve secure key accumulation of 5.2kbit in a single overpass in the limit.
• Score: 75.38606213726906
• License:
• Abstract: Quantum communication rates in terrestrial quantum networks are fundamentally limited by fibre loss, even in the presence of quantum repeaters. Satellites offer a solution for long-distance communication, with the most commonly explored scenario involving prepare-and-measure protocols connecting from orbit to a trusted-node ground station via free-space down-links. In contrast, up-link scenarios allow for entanglement to be distributed between a satellite and remote end users in terrestrial networks, eliminating any trust requirement on the ground station. Here we demonstrate an ultra-bright source of far-non-degenerate entangled photons and perform quantum key distribution in emulated high-loss satellite scenarios. With a loss profile corresponding to that of one of the pioneering Micius up-link experiments, and a terrestrial end user separated by 10~km of telecom fibre we achieve secure key bit accumulation of 5.2~kbit in a single emulated overpass in the asymptotic limit. Our results confirm the viability of upcoming low-Earth orbit receiver satellite missions.

Related papers

• A reconfigurable entanglement distribution network suitable for connecting multiple ground nodes with a satellite [0.0]
  In a brief satellite pass, the ground network is configured as a multipoint-to-point topology where all ground nodes establish entanglement with a satellite receiver. During times when this satellite is not available, the satellite up-link is rerouted via a single optical switch to the ground nodes. We numerically simulate a pulsed hyper-entangled photon source and study the performance of the proposed network configurations for quantum key distribution.
  arXiv  Detail & Related papers  (2024-06-20T01:16:23Z)
• Entanglement Swapping in Orbit: a Satellite Quantum Link Case Study [0.3958317527488534]
  We study the performance of a quantum link between two ground stations using a quantum-memory-equipped satellite as a quantum repeater. The number of available quantum memory slots m, together with the unavoidable round-trip communication latency t of at least a few milliseconds, severely reduces the effective average repetition rate to m/t.
  arXiv  Detail & Related papers  (2024-05-13T09:52:50Z)
• Satellite-based entanglement distribution and quantum teleportation with continuous variables [0.0]
  We study the effects of atmospheric turbulence in continuous-variable entanglement distribution and quantum teleportation in the optical regime between a ground station and a satellite. We include an intermediate station for either state generation, or beam refocusing, in order to reduce the effects of atmospheric turbulence and diffraction. Results show the feasibility of free-space entanglement distribution and quantum teleportation in downlink paths up to the LEO region, but also in uplink paths with the help of the intermediate station.
  arXiv  Detail & Related papers  (2023-03-30T08:39:59Z)
• A CubeSat platform for space based quantum key distribution [62.997667081978825]
  We report on the follow-up mission of SpooQy-1, a 3U CubeSat that successfully demonstrated the generation of polarization-entangled photons in orbit. The next iteration of the mission will showcase satellite-to-ground quantum key distribution based on a compact source of polarization-entangled photon-pairs. We briefly describe the design of the optical ground station that we are currently building in Singapore for receiving the quantum signal.
  arXiv  Detail & Related papers  (2022-04-23T06:28:43Z)
• Realizing quantum nodes in space for cost-effective, global quantum communication: in-orbit results and next steps [94.08853042978113]
  SpooQy-1 is a satellite developed at the Centre for Quantum Technologies. It has successfully demonstrated the operation of an entangled photon pair source on a resource-constrained CubeSat platform.
  arXiv  Detail & Related papers  (2021-04-22T02:59:23Z)
• Telecom-heralded entanglement between remote multimode solid-state quantum memories [55.41644538483948]
  Future quantum networks will enable the distribution of entanglement between distant locations and allow applications in quantum communication, quantum sensing and distributed quantum computation. Here we report the demonstration of heralded entanglement between two spatially separated quantum nodes, where the entanglement is stored in multimode solid-state quantum memories. We also show that the generated entanglement is robust against loss in the heralding path, and demonstrate temporally multiplexed operation, with 62 temporal modes.
  arXiv  Detail & Related papers  (2021-01-13T14:31:54Z)
• Satellite Quantum Communications: Fundamental Bounds and Practical Security [0.0]
  We apply and extend recent results in free-space quantum communications to determine the ultimate limits at which secret bits can be distributed via satellites. We study the composable finite-size secret key rates that are achievable by protocols of continuous variable quantum key distribution. We present a study with a sun-synchronous satellite, showing that its key distribution rate is able to outperform a ground chain of ideal quantum repeaters.
  arXiv  Detail & Related papers  (2020-12-03T06:53:57Z)
• Entanglement demonstration on board a nano-satellite [76.84500123816078]
  Quantum networks for secure communication can be realised using large fleets of satellites distributing entangled photon-pairs between ground-based nodes. This paper describes a miniaturised, polarization entangled, photon-pair source operating on board a nano-satellite.
  arXiv  Detail & Related papers  (2020-06-25T14:11:56Z)
• Integrating LEO Satellite and UAV Relaying via Reinforcement Learning for Non-Terrestrial Networks [51.05735925326235]
  A mega-constellation of low-earth orbit (LEO) satellites has the potential to enable long-range communication with low latency. We study the problem of forwarding packets between two faraway ground terminals, through an LEO satellite selected from an orbiting constellation. To maximize the end-to-end data rate, the satellite association and HAP location should be optimized. We tackle this problem using deep reinforcement learning (DRL) with a novel action dimension reduction technique.
  arXiv  Detail & Related papers  (2020-05-26T05:39:27Z)
• Quantum repeaters in space [0.0]
  Long-distance entanglement is a very precious resource, but its distribution is difficult due to the exponential losses of light in optical fibres. We propose to combine quantum repeaters and satellite-based links, into a scheme that allows to achieve entanglement distribution over global distances. The integration of satellite-based links with ground repeater networks can be envisaged to represent the backbone of the future Quantum Internet.
  arXiv  Detail & Related papers  (2020-05-20T15:43:42Z)

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.