Related papers: Distillation-Enhanced Continuous-Variable Quantum Teleportation for Satellite Communication Networks

Distillation-Enhanced Continuous-Variable Quantum Teleportation for Satellite Communication Networks

URL: http://arxiv.org/abs/2607.08977v1
Date: Thu, 09 Jul 2026 22:44:55 GMT
Title: Distillation-Enhanced Continuous-Variable Quantum Teleportation for Satellite Communication Networks
Abstract summary: Quantum teleportation (QT) over satellite-based free-space optical (FSO) channels is a promising approach for long-distance quantum communication.<n>We investigate continuous-variable (CV) QT in a dual-downlink scenario, where a satellite distributes entangled states to two ground stations.<n>We employ a non-Gaussian entanglement distillation protocol based on the sequential application of photon addition and photon subtraction (PA-PS) on the weaker channel.
Score: 18.47839904465837
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Quantum teleportation (QT) over satellite-based free-space optical (FSO) channels is a promising approach for long-distance quantum communication. However, its performance is significantly degraded by atmospheric loss and turbulence. In this paper, we investigate continuous-variable (CV) QT in a dual-downlink scenario, where a satellite distributes entangled states to two ground stations. To mitigate channel-induced degradation, we employ a non-Gaussian entanglement distillation protocol based on the sequential application of photon addition and photon subtraction (PA-PS) on the weaker channel. The results show that the proposed scheme improves teleportation fidelity by up to 7.7% and enhances entanglement negativity by approximately 105% in the low-to-moderate (below 600 km) loss regime. In addition, we identify an optimal squeezing parameter that balances entanglement strength and noise sensitivity. Taken together, these results demonstrate the effectiveness of PA-PS distillation for improving CV quantum communication in realistic satellite networks. We further characterize the trade-off between fidelity gain and the heralded success probability of the protocol.

Related papers

Single-Satellite Quantum Repeater Performance Analysis [0.0]
Space-based entanglement distribution has the potential to extend the range of quantum communication beyond that achievable through optical fibres.<n>Quantum repeaters have been proposed to mitigate the effects of channel losses for both fibre and satellite networks.<n>Direct dual downlink entangled pair distribution does not suffer such a latency restriction, hence can brute force'' the problem of high dual channel loss through increased source rate.
arXiv Detail & Related papers (2026-04-17T15:34:52Z)
Emulation of satellite up-link quantum communication with entangled photons [75.38606213726906]
We demonstrate an ultra-bright source of far-non-degenerate entangled photons and perform quantum key distribution in emulated high-loss satellite scenarios.<n>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.
arXiv Detail & Related papers (2025-02-05T19:14:55Z)
Increasing the secret key rate of satellite-to-ground entanglement-based QKD assisted by adaptive optics [0.48182159227299687]
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.
arXiv Detail & Related papers (2024-11-14T16:16:10Z)
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.<n> 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)
SPARQ: Efficient Entanglement Distribution and Routing in Space-Air-Ground Quantum Networks [50.91365514137301]
Space-air-ground quantum (SPARQ) network is developed as a means for providing a seamless on-demand entanglement distribution. Deep reinforcement learning framework is proposed and trained using deep Q-network (DQN) on multiple graphs of SPARQ. Third-party entanglement distribution policy is proposed to establish entanglement between communication parties.
arXiv Detail & Related papers (2024-09-19T16:31:37Z)
High-quality entangled photon source by symmetric beam displacement design [39.58317527488534]
Entangled photon sources are pivotal in advancing quantum communication, computing and sensing. This work introduces a polarization-entangled photon source, leveraging type-0 spontaneous parametric down-conversion. We attained a maximal Bell inequality violation, with the average entanglement visibility exceeding 99%.
arXiv Detail & Related papers (2024-07-04T10:29:47Z)
Improving Continuous-variable Quantum Channels with Unitary Averaging [37.69303106863453]
We present a scheme of passive linear optical unitary averaging for protecting unknown Gaussian states transmitted through an optical channel. The scheme reduces the effect of phase noise on purity, squeezing and entanglement, thereby enhancing the channel via a probabilistic error correcting protocol.
arXiv Detail & Related papers (2023-11-17T10:10:19Z)
Quantum Key Distribution With an Integrated Photonic Receiver [41.94295877935867]
Photonic integrated circuits (PICs) are key in advancing quantum technologies for secure communications. We implement a three-state BB84 protocol with decoy-state method to enhance quantum communications. One of the most notable results is the extraction of a secret key over a record-breaking 45 dB channel attenuation.
arXiv Detail & Related papers (2023-10-25T15:19:19Z)
Experimental free-space quantum key distribution over a turbulent high-loss channel [0.0]
Compared to fiber-based communication networks, free-space networks experience significantly less decoherence and photon loss. The atmospheric turbulence contributes to deviation in transmittance distribution, which introduces noise and channel loss. Active research is currently focused on establishing secure and practical quantum communication in a high-loss channel.
arXiv Detail & Related papers (2023-05-02T11:47:22Z)
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)
Long-distance twin-field quantum key distribution with entangled sources [4.334669226849793]
We propose a scheme to implement TFQKD with an entangled coherent state source in the middle to increase its range. Our work is a promising step toward long-distance secure communication and is greatly compatible with future global quantum network.
arXiv Detail & Related papers (2021-11-06T02:01:42Z)

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