Free-Space Quantum Key Distribution with Single Photons from Defects in Hexagonal Boron Nitride

• URL: http://arxiv.org/abs/2204.02830v1
• Date: Wed, 6 Apr 2022 13:47:03 GMT
• Title: Free-Space Quantum Key Distribution with Single Photons from Defects in Hexagonal Boron Nitride
• Authors: \c{C}a\u{g}lar Samaner, Serkan Pa\c{c}al, G\"orkem Mutlu, K{\i}van\c{c} Uyan{\i}k, and Serkan Ate\c{s}
• Abstract summary: We present a proof-of-concept demonstration of free-space quantum key distribution (QKD) with single photons generated from an isolated defect in hexagonal boron nitride (hBN) The source, operating at room temperature with a 10% brightness, is integrated into a B92 protocol and a secure key rate (SKR) of 238 bps and a quantum bit error rate (QBER) of 8.95% are achieved with 1 MHz clock rate.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We present a proof-of-concept demonstration of free-space quantum key distribution (QKD) with single photons generated from an isolated defect in hexagonal boron nitride (hBN). The source, operating at room temperature with a 10% brightness, is integrated into a B92 protocol and a secure key rate (SKR) of 238 bps and a quantum bit error rate (QBER) of 8.95% are achieved with 1 MHz clock rate. The effect of temporal filtering of detected photons on the performance of QKD parameters is also studied. We believe that our results will accelerate the work on improving the performance of optically active defects in hBN and their use in high-performance practical QKD systems.

Related papers

• Secure Quantum Key Distribution Using a Room-Temperature Quantum Emitter [0.0]
  We show the versatility of defects in hexagonal boron nitride (hBN) at room temperature by implementing the B92 protocol. Experiments yield a sifted key rate (SiKR) of 17.5 kbps with a QBER of 6.49% at a dynamic polarization encoding rate of 40 MHz. We also explore potential applications of hBN defects beyond QKD and analyze scenarios that could outperform conventional point-to-point QKD schemes.
  arXiv  Detail & Related papers  (2025-01-23T18:26:09Z)
• 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)
• Field Test of Quantum Key Distribution with High Key Creation Efficiency [2.647074888050002]
  We develop a miniature 1550-nm single-photon source to generate narrowband single photon in 50 time bins. By utilizing these single photons in the field test, we demonstrate the differential-phase-shift QKD with a key creation efficiency of 97%.
  arXiv  Detail & Related papers  (2024-06-12T00:42:43Z)
• Experimental single-photon quantum key distribution surpassing the fundamental coherent-state rate limit [11.795169912821704]
  Single-photon sources are essential for quantum networks, enabling applications ranging from quantum key distribution (QKD) to the burgeoning quantum internet. Here, we report high-rate QKD using a high-efficiency single-photon source, enabling an SKR transcending the fundamental rate limit of coherent light. Our findings conclusively demonstrate the superior performance of nanotechnology-based single-photon sources over coherent light for QKD applications, marking a pivotal stride towards the realization of a global quantum internet.
  arXiv  Detail & Related papers  (2024-06-04T07:28:15Z)
• Polarization Entanglement with highly non-degenerate photon pairs enhanced by effective walk-off compensation method [0.0]
  We demonstrate polarization entanglement in non-degenerate photon pairs using bulk periodically poled Lithium Niobate (PPLN) crystals. We introduce an effective compensation method using birefringent crystal wedges to eliminate spatial and temporal walkoffs simultaneously.
  arXiv  Detail & Related papers  (2024-05-10T18:12:51Z)
• Site-Controlled Purcell-Induced Bright Single Photon Emitters in Hexagonal Boron Nitride [62.170141783047974]
  Single photon emitters hosted in hexagonal boron nitride (hBN) are essential building blocks for quantum photonic technologies that operate at room temperature. We experimentally demonstrate large-area arrays of plasmonic nanoresonators for Purcell-induced site-controlled SPEs. Our results offer arrays of bright, heterogeneously integrated quantum light sources, paving the way for robust and scalable quantum information systems.
  arXiv  Detail & Related papers  (2024-05-03T23:02:30Z)
• Quantum Key Distribution Using a Quantum Emitter in Hexagonal Boron Nitride [48.97025221755422]
  We demonstrate a room temperature, discrete-variable quantum key distribution system using a bright single photon source in hexagonal-boron nitride. We have generated keys with one million bits length, and demonstrated a secret key of approximately 70,000 bits, at a quantum bit error rate of 6%. Our work demonstrates the first proof of concept finite-key BB84 QKD system realised with hBN defects.
  arXiv  Detail & Related papers  (2023-02-13T09:38:51Z)
• 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)
• Integrated Room Temperature Single Photon Source for Quantum Key Distribution [46.31057926734952]
  In this work, we realise an ultra-bright solid-state SPS based on an atomic defect in hexagonal boron nitride (hBN) The integrated system is capable of producing over ten million single photons per second at room temperature.
  arXiv  Detail & Related papers  (2022-01-28T01:32:03Z)
• Photonic verification of device-independent quantum key distribution against collective attacks [15.343274274430438]
  We develop a high-quality polarization-entangled photon source achieving a state-of-the-art detection efficiency about 87.5%. Together, we show that the measured quantum correlations are strong enough to ensure a positive key rate under the fiber length up to 220 m.
  arXiv  Detail & Related papers  (2021-10-04T14:38:06Z)
• 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.