Demonstration of a reconfigurable ground to space quantum networking scheme
- URL: http://arxiv.org/abs/2506.00194v1
- Date: Fri, 30 May 2025 20:07:04 GMT
- Title: Demonstration of a reconfigurable ground to space quantum networking scheme
- Authors: Stéphane Vinet, Duncan England, Chang-qing Xu, Thomas Jennewein,
- Abstract summary: We experimentally demonstrate a reconfigurable quantum network architecture suitable for integrating satellite links in metropolitan quantum networks.<n>The network architecture is designed such that once a satellite is in range, it is configured in a multipoint-to-point topology.<n>We show an increased coincidence-to-accidental ratio without additional resource overhead in a five-node network.
- Score: 0.25165775267615204
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We experimentally demonstrate a reconfigurable quantum network architecture suitable for integrating satellite links in metropolitan quantum networks. The network architecture is designed such that once a satellite is in range, it is configured in a multipoint-to-point topology where all ground nodes establish entanglement with the satellite receiver using time multiplexing to optimize long-distance transmission. Otherwise, the satellite up-link is rerouted to the ground nodes to form a pair-wise ground network. Leveraging both the time and frequency correlations of our photon-pair source, we demonstrate an increased coincidence-to-accidental ratio without additional resource overhead in a five-node network. To contextualize these experimental findings, we project their performance in a quantum key distribution scenario and outline a feasible route towards field deployment, using integrated photonics to enable network integration of up to 72 users.
Related papers
- A global quantum network with ground-based single-atom memories in optical cavities and satellite links [0.0]
We propose a quantum repeater architecture for distributing entanglement over intercontinental distances.<n>The efficient entanglement swapping is achieved by performing high-fidelity Rydberg gates and readouts.<n>Our results show that this architecture enables entanglement distribution over intercontinental distances.
arXiv Detail & Related papers (2025-07-03T05:58:03Z) - 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) - 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) - A scheme for multipartite entanglement distribution via separable
carriers [68.8204255655161]
We develop a strategy for entanglement distribution via separable carriers that can be applied to any number of network nodes.
We show that our protocol results in multipartite entanglement, while the carrier mediating the process is always in a separable state with respect to the network.
arXiv Detail & Related papers (2022-06-20T10:50:45Z) - Learning Emergent Random Access Protocol for LEO Satellite Networks [51.575090080749554]
We propose a novel grant-free random access solution for LEO SAT networks, dubbed emergent random access channel protocol (eRACH)
eRACH is a model-free approach that emerges through interaction with the non-stationary network environment.
Compared to RACH, we show from various simulations that our proposed eRACH yields 54.6% higher average network throughput.
arXiv Detail & Related papers (2021-12-03T07:44:45Z) - Controllable entangled state distribution in a dual-rail reconfigurable
optical network [62.997667081978825]
Reconfigurable distribution of entangled states is essential for operation of quantum networks connecting multiple devices such as quantum memories and quantum computers.
We introduce new quantum distribution network architecture enabling control of the entangled state propagation direction using linear-optical devices and phase shifters.
arXiv Detail & Related papers (2021-08-04T10:26:37Z) - A Reconfigurable Quantum Local Area Network Over Deployed Fiber [1.1713998235451095]
We implement flex-grid entanglement distribution in a deployed network for the first time.
We quantify the quality of the distributed polarization entanglement via log-negativity.
We demonstrate one possible quantum protocol enabled by the distributed entanglement network.
arXiv Detail & Related papers (2021-02-26T17:08:03Z) - Purification and Entanglement Routing on Quantum Networks [55.41644538483948]
A quantum network equipped with imperfect channel fidelities and limited memory storage time can distribute entanglement between users.
We introduce effectives enabling fast path-finding algorithms for maximizing entanglement shared between two nodes on a quantum network.
arXiv Detail & Related papers (2020-11-23T19:00:01Z) - 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.