Phase-Matching Quantum Key Distribution without Intensity Modulation
- URL: http://arxiv.org/abs/2303.11585v3
- Date: Sat, 19 Aug 2023 13:06:44 GMT
- Title: Phase-Matching Quantum Key Distribution without Intensity Modulation
- Authors: Shan-Feng Shao, Xiao-Yu Cao, Yuan-Mei Xie, Jie Gu, Wen-Bo Liu, Yao Fu,
Hua-Lei Yin, Zeng-Bing Chen
- Abstract summary: We propose a phase-matching quantum key distribution protocol without intensity modulation.
Simulation results show that the transmission distance of our protocol could reach 305 km in telecommunication fiber.
Our protocol provides a promising solution for constructing quantum networks.
- Score: 25.004151934190965
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum key distribution provides a promising solution for sharing secure
keys between two distant parties with unconditional security. Nevertheless,
quantum key distribution is still severely threatened by the imperfections of
devices. In particular, the classical pulse correlation threatens security when
sending decoy states. To address this problem and simplify experimental
requirements, we propose a phase-matching quantum key distribution protocol
without intensity modulation. Instead of using decoy states, we propose a novel
method to estimate the theoretical upper bound on the phase error rate
contributed by even-photon-number components. Simulation results show that the
transmission distance of our protocol could reach 305 km in telecommunication
fiber. Furthermore, we perform a proof-of-principle experiment to demonstrate
the feasibility of our protocol, and the key rate reaches 22.5 bps under a 45
dB channel loss. Addressing the security loophole of pulse intensity
correlation and replacing continuous random phase with 6 or 8 slices random
phase, our protocol provides a promising solution for constructing quantum
networks.
Related papers
- Twin-field-based multi-party quantum key agreement [0.0]
We study a method to extend the twin-field key distribution protocol to a scheme for multi-party quantum key agreement.
We derive the key rate based on the entanglement-based source-replacement scheme.
arXiv Detail & Related papers (2024-09-06T11:51:10Z) - Decoherence-assisted quantum key distribution [37.69303106863453]
We show that our method reduces the amount of information that an eavesdropper can obtain in the BB84 protocol under the entangling probe attack.
We demonstrate experimentally that Alice and Bob can agree on a scheme to that gives low values of the quantum bit error rate.
arXiv Detail & Related papers (2024-05-30T15:28:07Z) - Semi-device independent nonlocality certification for near-term quantum
networks [46.37108901286964]
Bell tests are the most rigorous method for verifying entanglement in quantum networks.
If there is any signaling between the parties, then the violation of Bell inequalities can no longer be used.
We propose a semi-device independent protocol that allows us to numerically correct for effects of correlations in experimental probability distributions.
arXiv Detail & Related papers (2023-05-23T14:39:08Z) - Breaking the Rate-Loss Bound of Quantum Key Distribution with
Asynchronous Two-Photon Interference [16.81040156666027]
A new quantum key distribution protocol can surpass the secret key capacity even without phase tracking and phase locking.
Our work provides a promising candidate for practical scalable quantum communication networks.
arXiv Detail & Related papers (2021-12-22T02:42:43Z) - Scalable High-Rate Twin-Field Quantum Key Distribution Networks without
Constraint of Probability and Intensity [9.67767681743488]
We propose a two-photon twin-field quantum key distribution protocol.
We exploit the non-interference mode as the code mode to highly tolerate interference errors.
Our protocol can transcend the limitations while breaking the secret key capacity of repeaterless quantum key distribution.
arXiv Detail & Related papers (2021-12-21T13:00:28Z) - Homodyne Detection Quadrature Phase Shift Keying Continuous-Variable
Quantum Key Distribution with High Excess Noise Tolerance [7.87972015113057]
We propose a homodyne detection protocol using the quadrature phase shift keying technique.
By limiting information leakage, our proposed protocol enhances excess noise tolerance to a high level.
Our results imply that the current protocol is able to distribute keys in nearly intercity area.
arXiv Detail & Related papers (2021-04-22T16:10:35Z) - Composably secure data processing for Gaussian-modulated continuous
variable quantum key distribution [58.720142291102135]
Continuous-variable quantum key distribution (QKD) employs the quadratures of a bosonic mode to establish a secret key between two remote parties.
We consider a protocol with homodyne detection in the general setting of composable finite-size security.
In particular, we analyze the high signal-to-noise regime which requires the use of high-rate (non-binary) low-density parity check codes.
arXiv Detail & Related papers (2021-03-30T18:02:55Z) - Round-robin differential phase-time-shifting protocol for quantum key
distribution: theory and experiment [58.03659958248968]
Quantum key distribution (QKD) allows the establishment of common cryptographic keys among distant parties.
Recently, a QKD protocol that circumvents the need for monitoring signal disturbance, has been proposed and demonstrated in initial experiments.
We derive the security proofs of the round-robin differential phase-time-shifting protocol in the collective attack scenario.
Our results show that the RRDPTS protocol can achieve higher secret key rate in comparison with the RRDPS, in the condition of high quantum bit error rate.
arXiv Detail & Related papers (2021-03-15T15:20:09Z) - Path-encoded high-dimensional quantum communication over a 2 km
multicore fiber [50.591267188664666]
We demonstrate the reliable transmission over a 2 km long multicore fiber of path-encoded high-dimensional quantum states.
A stable interferometric detection is guaranteed, allowing for low error rates and the generation of 6.3 Mbit/s of secret key rate.
arXiv Detail & Related papers (2021-03-10T11:02:45Z) - The phase matching quantum key distribution protocol with 3-state
systems [0.0]
Quantum Key Distribution, as a branch of quantum mechanics in cryptography, can distribute keys between legal communication parties in an unconditionally secure manner.
We consider a Phase-Matching Quantum Key Distribution protocol with 3-state systems for the first time, where the phase of the coherent state is 3.
arXiv Detail & Related papers (2020-02-22T09:15:44Z) - Experimental quantum conference key agreement [55.41644538483948]
Quantum networks will provide multi-node entanglement over long distances to enable secure communication on a global scale.
Here we demonstrate quantum conference key agreement, a quantum communication protocol that exploits multi-partite entanglement.
We distribute four-photon Greenberger-Horne-Zeilinger (GHZ) states generated by high-brightness, telecom photon-pair sources across up to 50 km of fibre.
arXiv Detail & Related papers (2020-02-04T19:00:31Z)
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.