Satellites promise global-scale quantum networks
arXiv:2505.06693 · doi:10.1364/OPTICAQ.567531
Abstract
Academia, governments, and industry around the world are on a quest to build long-distance quantum communication networks for a future quantum internet. Using air and fiber channels, quantum communication quickly faced the daunting challenge of exponential photon loss with distance. Quantum repeaters were invented to solve the loss problem by probabilistically establishing entanglement over short distances and using quantum memories to synchronize the teleportation of such entanglement to long distances. However, due to imperfections and complexities of quantum memories, ground-based proof-of-concept repeater demonstrations have been restricted to metropolitan-scale distances. In contrast, direct photon transmission from satellites through empty space faces almost no exponential absorption loss and only quadratic beam divergence loss. A single satellite successfully distributed entanglement over more than 1,200 km. It is becoming increasingly clear that quantum communication over large intercontinental distances (e.g. 4,000-20,000 km) will likely employ a satellite-based architecture. This could involve quantum memories and repeater protocols in satellites, or memory-less satellite-chains through which photons are simply reflected, or some combination thereof. Rapid advancements in the space launch and classical satellite communications industry provide a strong tailwind for satellite quantum communication, promising economical and easier deployment of quantum communication satellites.
19 pages, 7 figures
References in corpus (49)
- The Quantum Internet
- Satellite-to-ground quantum key distribution
- Free-Space distribution of entanglement and single photons over 144 km
- LIGO: The Laser Interferometer Gravitational-Wave Observatory
- Ground-to-satellite quantum teleportation
- Realization of a multi-node quantum network of remote solid-state qubits
- Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
- Quantum repeaters: From quantum networks to the quantum internet
- Progress in satellite quantum key distribution
- Towards a global quantum network
- Distributed Quantum Computation Based-on Small Quantum Registers
- Multiplexed Memory-Insensitive Quantum Repeaters
- Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
- Micius quantum experiments in space
- Efficient quantum memory for single photon polarization qubits
- Quantum private queries
- Entanglement of trapped-ion qubits separated by 230 meters
- One-hour coherent optical storage in an atomic frequency comb memory
- Distributed Quantum Computing across an Optical Network Link
- Satellite Quantum Communications: Fundamental Bounds and Practical Security
- A multinode quantum network over a metropolitan area
- Highly multimode memory in a crystal
- Entanglement over global distances via quantum repeaters with satellite links
- A telecom-wavelength quantum repeater node based on a trapped-ion processor
- Metropolitan-scale heralded entanglement of solid-state qubits
- Decoherence-protected memory for a single-photon qubit
- A Quantum Repeater Node Demonstrating Unconditionally Secure Key Distribution
- Experimental demonstration of memory-enhanced scaling for entanglement connection of quantum repeater segments
- Quantum Technologies in Space
- Intrinsic Mixed-state Topological Order
- The Deep Space Quantum Link: Prospective Fundamental Physics Experiments using Long-Baseline Quantum Optics
- Simulating quantum repeater strategies for multiple satellites
- Cavity-Enhanced Atom-Photon Entanglement with Subsecond Lifetime
- Efficient optical pumping of Zeeman spin levels in Nd3+:YVO4
- The ideal wavelength for daylight free-space quantum key distribution
- Non-destructive photon detection using a single rare earth ion coupled to a photonic cavity
- Time-delayed single satellite quantum repeater node for global quantum communications
- Satellite Relayed Global Quantum Communication without Quantum Memory
- Time-frequency optical filtering: efficiency vs. temporal-mode discrimination in incoherent and coherent implementations
- Multiqubit entanglement witness
- Vacuum Beam Guide for Large-Scale Quantum Networks
- Entanglement dynamics of photon pairs and quantum memories in the gravitational field of the earth
- Proposal for a long-lived quantum memory using matter-wave optics with Bose-Einstein condensates in microgravity
- Testing quantum theory on curved space-time with quantum networks
- Standalone mobile quantum memory system
- Building Europe's first space-based Quantum Key Distribution system -- The German Aerospace Center's role in the EAGLE-1 mission
- Satellite-assisted quantum communication with single photon sources and atomic memories
- QEYSSat 2.0 -- White Paper on Satellite-based Quantum Communication Missions in Canada
- QuESat: Satellite-Assisted Quantum Internet for Global-Scale Entanglement Distribution