Polarization-encoded quantum key distribution with a room-temperature telecom single-photon emitter
- URL: http://arxiv.org/abs/2409.17060v2
- Date: Mon, 7 Oct 2024 05:23:47 GMT
- Title: Polarization-encoded quantum key distribution with a room-temperature telecom single-photon emitter
- Authors: Xingjian Zhang, Haoran Zhang, Rui Ming Chua, John Eng, Max Meunier, James A Grieve, Weibo Gao, Alexander Ling,
- Abstract summary: Single photon sources (SPSs) are directly applicable in quantum key distribution (QKD)
We report an observation of polarization-encoded QKD using a room-temperature telecom SPS based on a GaN defect.
- Score: 47.54990103162742
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Single photon sources (SPSs) are directly applicable in quantum key distribution (QKD) because they allow the implementation of the canonical BB84 protocol. To date, QKD implementations using SPS are not widespread because of the need for cryogenic operation, or frequency conversion to a wavelength efficiently transmitted over telecommunication fibers. We report an observation of polarization-encoded QKD using a room-temperature telecom SPS based on a GaN defect. A field test over 3.5 km of deployed fiber with 4.0 dB loss yielded a secure key rate of 585.9~bps. Further testing in a 32.5 km fiber spool (attenuation of 11.2 dB), which exhibited substantially lower polarization mode dispersion, yielded a secure key rate of 50.4 bps. Both results exhibited a quantum bit error rate (QBER) of approximately 5%. These results illustrate the potential of the GaN defects for supporting polarization-encoded quantum communication.
Related papers
- Secure Quantum Key Distribution with Room-Temperature Quantum Emitter [0.0]
We demonstrate the B92 protocol based on single photons from defects in hexagonal boron nitride (hBN)
The results show a sifted key rate (SiKR) of 17.5 kbps with a QBER of 6.49 % at a dynamic polarization encoding rate of 40 MHz.
arXiv Detail & Related papers (2025-01-23T18:26:09Z) - A Quantum Key Distribution System for Mobile Platforms with Highly Indistinguishable States [0.0]
Quantum key distribution (QKD) allows two users to exchange a provably secure key for cryptographic applications.
Here, we measure the indistinguishability of quantum states in a prepare-and-measure three-state BB84 polarization-based decoy state protocol.
We make the spatial, spectral, and temporal DOF of the generated quantum states nearly indistinguishable using a spatial filter single-mode fiber, a narrow-band spectral filter, and adjustable timing of the electrical pulses driving the RC-LEDs.
arXiv Detail & Related papers (2024-11-29T17:45:41Z) - Metropolitan quantum key distribution using a GaN-based room-temperature telecommunication single-photon source [54.32714639668751]
Single-photon sources (SPS) hold the potential to enhance the performance of quantum key distribution (QKD)
We have successfully demonstrated QKD using a room-temperature SPS at telecommunication wavelength.
arXiv Detail & Related papers (2024-09-27T07:35:51Z) - Polarization Purity and Dispersion Characteristics of Nested Antiresonant Nodeless Hollow-Core Optical Fiber at Near- and Short-wave-IR Wavelengths for Quantum Communications [3.9479376216271516]
Antiresonant nodeless fibers (NANF) have been shown to possess unparalleled polarization purity with minimal birefringence in the telecom wavelength range.
Our results show a polarization extinction ratio between -30 dB and -70 dB across the 1520 to 1620 nm range in CW operation, peaking at -60 dB at the 2-$mu$m design wavelength.
arXiv Detail & Related papers (2024-05-05T16:32:28Z) - High-rate intercity quantum key distribution with a semiconductor single-photon source [0.8114920774958947]
Quantum key distribution (QKD) enables the transmission of information that is secure against general attacks by eavesdroppers.
The use of on-demand quantum light sources in QKD protocols is expected to help improve security and maximum tolerable loss.
Here we report on the first QKD experiment using a bright deterministic single photon source.
A BB84 protocol based on polarisation encoding is realised using the high-rate single photons in the telecommunication C-band emitted from a semiconductor QD embedded in a circular Bragg grating structure.
arXiv Detail & Related papers (2023-08-30T09:57:07Z) - Efficient room-temperature molecular single-photon sources for quantum
key distribution [51.56795970800138]
Quantum Key Distribution (QKD) allows the distribution of cryptographic keys between multiple users in an information-theoretic secure way.
We introduce and demonstrate a proof-of-concept QKD system exploiting a molecule-based single-photon source operating at room temperature and emitting at 785nm.
arXiv Detail & Related papers (2022-02-25T11:52:10Z) - Fibre polarization state compensation in entanglement-based quantum key
distribution [62.997667081978825]
Quantum Key Distribution (QKD) using polarisation encoding can be hard to implement over deployed telecom fibres.
We show a technique for dynamically compensating fibre-induced alteration in a QKD system over deployed fibre.
arXiv Detail & Related papers (2021-07-16T00:53:48Z) - 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) - Stable Polarization Entanglement based Quantum Key Distribution over
Metropolitan Fibre Network [55.41644538483948]
We demonstrate a quantum key distribution implementation over deployed dark telecom fibers with polarisation-entangled photons generated at the O-band.
One of the photons in the pairs are propagated through 10km of deployed fiber while the others are detected locally.
This ensures continuous and stable QKD operation with an average QBER of 6.4% and a final key rate of 109 bits/s.
arXiv Detail & Related papers (2020-07-04T02:36:57Z)
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.