Long-distance quantum key distribution based on the physical loss
control
- URL: http://arxiv.org/abs/2105.00035v1
- Date: Fri, 30 Apr 2021 18:28:46 GMT
- Title: Long-distance quantum key distribution based on the physical loss
control
- Authors: N. S. Kirsanov, N. R. Kenbaev, A. B. Sagingalieva, D. A. Kronberg, V.
M. Vinokur, G. B. Lesovik
- Abstract summary: Existing quantum cryptography is resistant against secrecy-breaking quantum computers but suffers fast decay of the signal at long distances.
We put forth long-distance high secrecy optical cryptography, creating the fast quantum key distribution over distances up to 40,000 kilometers.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Existing quantum cryptography is resistant against secrecy-breaking quantum
computers but suffers fast decay of the signal at long distances. The various
types of repeaters of propagating quantum states have been developed to meet
the challenge, but the problem is far from being solved. We step in the breach
and put forth long-distance high secrecy optical cryptography, creating the
fast quantum key distribution over distances up to 40,000 kilometers. The key
element of the proposed protocol is the physical control over the transmission
line.
Related papers
- Unconditionally secure key distribution without quantum channel [0.76146285961466]
Currently, the quantum scheme stands as the only known method for achieving unconditionally secure key distribution.
We propose another key distribution scheme with unconditional security, named probability key distribution, that promises users between any two distances to generate a fixed and high secret key rate.
Non-local entangled states can be generated, identified and measured in the equivalent virtual protocol and can be used to extract secret keys.
arXiv Detail & Related papers (2024-08-24T15:13:14Z) - The Evolution of Quantum Secure Direct Communication: On the Road to the
Qinternet [49.8449750761258]
Quantum secure direct communication (QSDC) is provably secure and overcomes the threat of quantum computing.
We will detail the associated point-to-point communication protocols and show how information is protected and transmitted.
arXiv Detail & Related papers (2023-11-23T12:40:47Z) - Experimental demonstration of scalable quantum key distribution over a
thousand kilometers [0.0]
Quantum key distribution offers protection against quantum computer attacks.
Long-distance transmission is problematic since the essential signal decay in optical channels occurs at a distance of about a hundred kilometers.
We present the experimental demonstration of the TQ-QKD protocol allowing quantum key distribution over 1079 kilometers.
arXiv Detail & Related papers (2023-06-07T16:58:52Z) - Quantum process tomography of continuous-variable gates using coherent
states [49.299443295581064]
We demonstrate the use of coherent-state quantum process tomography (csQPT) for a bosonic-mode superconducting circuit.
We show results for this method by characterizing a logical quantum gate constructed using displacement and SNAP operations on an encoded qubit.
arXiv Detail & Related papers (2023-03-02T18:08:08Z) - Forty Thousand Kilometers Under Quantum Protection [0.0]
Quantum key distribution (QKD) is a revolutionary cryptography response to the cyberattacks threat posed by quantum computing.
Here, we build the long-distance security of the QKD upon the quantum foundations of the Second Law of Thermodynamics.
Our approach enables us to realize quantum states' repetition by optical amplifiers keeping states' wave properties and phase coherence.
arXiv Detail & Related papers (2023-01-25T14:43:19Z) - Boosting quantum key distribution via the end-to-end physical control [0.0]
Building on the quantum irreversibility, we develop a technique reborning the existing QKDs into protocols that are unrestricted in distance.
The core of our method is the continuous end-to-end physical control of information leaks in the quantum channel.
arXiv Detail & Related papers (2021-09-12T17:47:20Z) - 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) - Telecom-heralded entanglement between remote multimode solid-state
quantum memories [55.41644538483948]
Future quantum networks will enable the distribution of entanglement between distant locations and allow applications in quantum communication, quantum sensing and distributed quantum computation.
Here we report the demonstration of heralded entanglement between two spatially separated quantum nodes, where the entanglement is stored in multimode solid-state quantum memories.
We also show that the generated entanglement is robust against loss in the heralding path, and demonstrate temporally multiplexed operation, with 62 temporal modes.
arXiv Detail & Related papers (2021-01-13T14:31:54Z) - Direct Quantum Communications in the Presence of Realistic Noisy
Entanglement [69.25543534545538]
We propose a novel quantum communication scheme relying on realistic noisy pre-shared entanglement.
Our performance analysis shows that the proposed scheme offers competitive QBER, yield, and goodput.
arXiv Detail & Related papers (2020-12-22T13:06:12Z) - Fault-tolerant Coding for Quantum Communication [71.206200318454]
encode and decode circuits to reliably send messages over many uses of a noisy channel.
For every quantum channel $T$ and every $eps>0$ there exists a threshold $p(epsilon,T)$ for the gate error probability below which rates larger than $C-epsilon$ are fault-tolerantly achievable.
Our results are relevant in communication over large distances, and also on-chip, where distant parts of a quantum computer might need to communicate under higher levels of noise.
arXiv Detail & Related papers (2020-09-15T15:10:50Z)
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.