Quantum Key Distribution using True On-demand Single Photons over a Field-Installed Fiber Link

Zahidy, Mujtaba; Krehbiel, Martin; Lodahl, Peter; Mikkelsen, Mikkel T.; Wang, Ying; Oxenløwe, Leif Katsuo; Muller, Ronny R.; Galili, Michael; Bacco, Davide; Lio, Beatrice Da; Forchhammer, Søren; Midolo, Leonardo

doi:10.1109/ipc53466.2022.9975619

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…Photonic crystal cavities offer the possibility to control the emission in waveguides, and they are a natural option to control many photons on chip for quantum computation applications. Self‐assembled QDs [ 78,102 ] and Er ions [ 94 ] have also reached very competitive BPI ‐values in this integrated cavity approach, and seminal implementations in TMDs [ 175,193 ] and hBN [ 238,326 ] have been demonstrated recently, yet less performant than their versions in Fabry–Pérot cavities, as mentioned before. Further interesting developments in terms of shaping the photonic environment of single photon emitters include magneto‐optical structures enabling single photon emission with well‐defined orbital angular momenta.…”

Section: Discussionmentioning

confidence: 96%

“…[ 51,52,78,95–97 ] Relevant applications in quantum communication and computation have been demonstrated (a review on this matter can be consulted, for example, in Refs. [98,99]), such as the fiber‐based remote interference over hundreds of kilometers, [ 100 ] hundreds of meters free‐space‐based [ 101 ] and kilometre‐scale fiber‐based metropolitan quantum key distribution demonstrations in the telecom range [ 102,103 ] (protocols where photon‐interference is not required). Notably, the growth control on QDs has allowed to achieve large values of indistinguishability between photons emitted from two separate sources [ 104 ] and coupling effects among identical emitters, [ 105–107 ] holding the promise to reproducibly scale‐up the technology.…”

Section: State‐of‐the‐art Of Single Photon Sources In the Solid‐statementioning

confidence: 99%

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Solid‐State Single‐Photon Sources: Recent Advances for Novel Quantum Materials

Esmann,

Wein,

Antón‐Solanas

2024

Adv Funct Materials

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In this review, the current landscape of emergent quantum materials for quantum photonic applications is described. The review focuses on three specific solid‐state platforms: single emitters in monolayers of transition metal dichalcogenides (TMDs), defects in hexagonal boron nitride (hBN), and colloidal quantum dots in perovskites (PQDs). These platforms share a unique technological accessibility, enabling the rapid implementation of testbed quantum applications, all while being on the verge of becoming technologically mature enough for a first generation of real‐world quantum applications. The review begins with a comprehensive overview of the current state‐of‐the‐art for relevant single‐photon sources in the solid‐state, introducing the most important performance criteria and experimental characterization techniques along the way. Progress for each of the three novel materials is then benchmarked against more established (yet complex) platforms, highlighting performance, material‐specific advantages, and giving an outlook on quantum applications. This review will thus provide the reader with a snapshot on latest developments in the fast‐paced field of emergent single‐photon sources in the solid‐state, including all the required concepts and experiments relevant to this technology.

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Section: Discussionmentioning

confidence: 96%

Section: State‐of‐the‐art Of Single Photon Sources In the Solid‐statementioning

confidence: 99%

Solid‐State Single‐Photon Sources: Recent Advances for Novel Quantum Materials

Esmann,

Wein,

Antón‐Solanas

2024

Adv Funct Materials

View full text Add to dashboard Cite

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“…Polarization-based QKD effectively counters these threats, as any attempt to intercept the quantum keys alters the polarization states, thereby signaling a potential security breach. This inherent feature of polarization-based QKD provides an added layer of security, crucial for the public and dynamic context of railroad networks [46], [47].…”

Section: ) Security Analysis In Railroad Network Contextmentioning

confidence: 99%

Using Quantum Key Distribution With Free Space Optics to Secure Communications in High-Speed Trains

Al-Mohammed,

Yaacoub,

Abualsaud

et al. 2024

IEEE Access

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In the burgeoning era of quantum communications, Internet of Things (IoT) devices in highspeed train (HST) environments encounter formidable challenges. These devices are constrained by limited power and computational capabilities while needing to safeguard their data and communications against adversaries equipped with quantum-grade computational power. To counter such threats, Quantum Key Distribution (QKD) emerges as a vital solution, facilitating secure communication between servers and IoT controllers, thereby shielding the more vulnerable IoT sensors. This paper delves into the application of QKD within the unique scenario of HSTs, employing Free Space Optics (FSO) to establish high data rate communication channels. Our experimental setup involves the integration of FSO links for photon exchange essential to QKD. We meticulously explore the QKD process in the context of HSTs, detailing our methodology that involves the alignment of FSO transceivers on ground base stations with those on the moving trains, thereby enabling efficient photon exchange. The study presents quantitative results demonstrating that this approach allows for the exchange of a substantial number of keys, with negligible impact on FSO data throughput. These findings highlight that our proposed method can significantly enhance IoT communication security in HSTs without compromising the Quality of Service (QoS) offered to train passengers. Furthermore, we assess the system's performance under various visibility conditions, which is crucial for FSO viability. Our results indicate the robustness of the proposed QKD method in diverse operational scenarios, underlining its practical applicability in securing IoT communications within HST environments. Through this study, we provide a comprehensive understanding of implementing QKD in highspeed mobile settings, contributing valuable insights into its effectiveness and feasibility.INDEX TERMS QKD, BB84, Quantum security, FSO, wireless optic communication, high speed train.

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Quantum Key Distribution using True On-demand Single Photons over a Field-Installed Fiber Link

Cited by 2 publications

References 9 publications

Solid‐State Single‐Photon Sources: Recent Advances for Novel Quantum Materials

Solid‐State Single‐Photon Sources: Recent Advances for Novel Quantum Materials

Using Quantum Key Distribution With Free Space Optics to Secure Communications in High-Speed Trains

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