Few-mode-fiber technology fine-tunes losses of quantum communication systems
arXiv:2103.05018 · doi:10.1103/PhysRevApplied.16.034018
Abstract
A natural choice for quantum communication is to use the relative phase between two paths of a single-photon for information encoding. This method was nevertheless quickly identified as impractical over long distances and thus a modification based on single-photon time-bins has then become widely adopted. It however, introduces a fundamental loss, which increases with the dimension and that limits its application over long distances. Here, we are able to solve this long-standing hurdle by employing a few-mode fiber space-division multiplexing platform working with orbital angular momentum modes. In our scheme, we maintain the practicability provided by the time-bin scheme, while the quantum states are transmitted through a few-mode fiber in a configuration that does not introduce post-selection losses. We experimentally demonstrate our proposal by successfully transmitting phase-encoded single-photon states for quantum cryptography over 500 m of few-mode fiber, showing the feasibility of our scheme.
arXiv comment8 pages, 6 figures. There was a mistake in Fig. 4 in v2. This is now corrected in this version and also in the published version
References in corpus (29)
- Quantum Cryptography
- Space Division Multiplexing in Optical Fibres
- Advances in Quantum Cryptography
- Secure quantum key distribution with realistic devices
- Integrated Photonic Quantum Technologies
- The European Quantum Technologies Roadmap
- Quantum key distribution over 122 km of standard telecom fiber
- Experimental measurement-device-independent quantum key distribution
- Provably-Secure and High-Rate Quantum Key Distribution with Time-Bin Qudits
- Photonic polarization gears for ultra-sensitive angular measurements
- The Photonic Lantern
- Higher-dimensional orbital angular momentum based quantum key distribution with mutually unbiased bases
- Real-world two-photon interference and proof-of-principle quantum key distribution immune to detector attacks
- Twisting of light around rotating black holes
- A double-slit quantum eraser
- 2-GHz clock quantum key distribution over 260 km of standard telecom fiber
- Quantum information processing with space-division multiplexing optical fibres
- High-dimensional decoy-state quantum key distribution over 0.3 km of multicore telecommunication optical fibers
- Quantum Random Access Codes using Single -level Systems
- Simple 2.5 GHz time-bin quantum key distribution
- Experimental bit commitment based on quantum communication and special relativity
- Gigahertz quantum key distribution with InGaAs avalanche photodiodes
- Experimental polarization encoded quantum key distribution over optical fibres with real-time continuous birefringence compensation
- Simple and high-speed polarization-based QKD
- Long-distance distribution of genuine energy-time entanglement
- Stable transmission of high-dimensional quantum states over a 2 km multicore fiber
- Robust and stable delay interferometers with application to -dimensional time-frequency quantum key distribution
- Postselection-Loophole-Free Bell Test Over an Installed Optical Fiber Network
- Decoherence in a double-slit quantum eraser