Applications of single photons to quantum communication and computing

Nature Reviews Physics, Journal Year: 2023, Volume and Issue: 5(6), P. 326 - 338

Published: May 26, 2023

Language: Английский

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Quantum dots for photonic quantum information technology

Advances in Optics and Photonics, Journal Year: 2023, Volume and Issue: 15(3), P. 613 - 613

Published: July 10, 2023

The generation, manipulation, storage, and detection of single photons play a central role in emerging photonic quantum information technology. Individual serve as flying qubits transmit the at high speed with low losses, for example between individual nodes networks. Due to laws mechanics, communication is fundamentally tap-proof, which explains enormous interest this modern On other hand, stationary or states computers can potentially lead increases performance through parallel data processing, outperform classical specific tasks when advantage achieved. Here, we discuss depth great potential dots (QDs) In context, QDs form key resource implementation networks because they generate on-demand. Moreover, are compatible mature semiconductor technology, so that be integrated comparatively easily into nanophotonic structures, basis light sources circuits. After thematic introduction, present numerical methods theoretical approaches device design physical description dot devices. We then technical solutions epitaxial growth deterministic nanoprocessing devices based on QDs. Furthermore, most promising concepts circuits include active elements applications these novel close an overview open issues outlook future developments.

Language: Английский

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Atomically-thin single-photon sources for quantum communication

npj 2D Materials and Applications, Journal Year: 2023, Volume and Issue: 7(1)

Published: Jan. 27, 2023

To date, quantum communication widely relies on attenuated lasers for secret key generation. In future networks fundamental limitations resulting from their probabilistic photon distribution must be overcome by using deterministic light sources. Confined excitons in monolayers of transition metal dichalcogenides (TMDCs) constitute an emerging type emitter These atomically-thin solid-state sources show appealing prospects large-scale and low-cost device integration, meeting the demands information technologies. Here, we pioneer practical suitability TMDC devices communication. We employ a $\mathrm{WSe}_2$ monolayer single-photon source to emulate BB84 protocol (QKD) setup achieve click rates up 66.95 kHz antibunching values down 0.034 - performance competitive with QKD experiments semiconductor dots or color centers diamond. Our work opens route towards wider applications technologies

Language: Английский

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Edge Computing for Industry 5.0: Fundamental, Applications, and Research Challenges

IEEE Internet of Things Journal, Journal Year: 2024, Volume and Issue: 11(11), P. 19070 - 19093

Published: March 7, 2024

Industry 5.0 is the next stage in industrial evolution, collaborating between human ingenuity and intelligent technologies to provide manufacturing solutions. Integrating modern technology like Artificial Intelligence (AI), robotics, Internet of Things (IoT) into production processes characterizes 5.0. On other hand, edge computing provides real-time data processing analysis at networks edge, closer source a vital component Edge enables access communicate information about their sectors using more accessible, standard hardware software resources. However, no recent survey papers have examined importance This study aims fill that gap by presenting on discussing variety could be used implement support this new paradigm. First, we outline an overview fundamentals architecture. Then objectives are summarized address various research challenges, including privacy, human-robot co-working, sustainability, robust networks. Afterwards, paper extensive emerging for 5.0, such as collaborative robots, AI, Digital Twins, many more. In addition, highlights open challenges potential solutions should addressed further achieve

Language: Английский

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High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 18, 2024

Abstract Single indistinguishable photons at telecom C-band wavelengths are essential for quantum networks and the future internet. However, high-throughput technology single-photon generation 1550 nm remained a missing building block to overcome present limitations in communication information technologies. Here, we demonstrate fabrication of quantum-photonic integrated devices operating based on epitaxial semiconductor dots. Our technique enables deterministic integration single pre-selected emitters into microcavities circular Bragg gratings. Respective feature triggered with ultra-high purity record-high photon indistinguishability. Further improvements yield coherence properties will pave way implementing non-linear advanced wavelengths.

Language: Английский

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On-Demand Generation of Indistinguishable Photons in the Telecom C-Band Using Quantum Dot Devices

ACS Photonics, Journal Year: 2024, Volume and Issue: 11(2), P. 339 - 347

Published: Jan. 23, 2024

Semiconductor quantum dots (QDs) enable the generation of single and entangled photons, which are useful for various applications in photonic technologies. Specifically communication via fiber-optical networks, operation telecom C-band centered around 1550 nm is ideal. The direct QD-photons this spectral range with high quantum-optical quality, however, remained challenging. Here, we demonstrate coherent on-demand indistinguishable photons from QD devices consisting InAs/InP QD-mesa structures heterogeneously integrated a metallic reflector on silicon wafer. Using pulsed two-photon resonant excitation biexciton-exciton radiative cascade, observe Rabi rotations up to pulse areas 4π single-photon purity terms

Language: Английский

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Emerging pathways in environmentally friendly synthesis of carbon-based quantum dots for exploring antibacterial resistance

Inorganic Chemistry Communications, Journal Year: 2024, Volume and Issue: 161, P. 112012 - 112012

Published: Jan. 6, 2024

Language: Английский

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Quantum key distribution using deterministic single-photon sources over a field-installed fibre link

npj Quantum Information, Journal Year: 2024, Volume and Issue: 10(1)

Published: Jan. 2, 2024

Abstract Quantum-dot-based single-photon sources are key assets for quantum information technology, supplying on-demand scalable resources computing and communication. However, long-lasting issues such as limited long-term stability source brightness have traditionally impeded their adoption in real-world applications. Here, we realize a distribution field trial using true single photons across an 18-km-long dark fibre, located the Copenhagen metropolitan area, optimized, state-of-the-art, quantum-dot frequency-converted to telecom wavelength. A secret generation rate of > 2 kbits/s realized over 9.6 dB channel loss is achieved with polarization-encoded BB84 scheme, showing remarkable more than 24 hours continuous operation. Our results highlight maturity deterministic technology while paving way advanced single-photon-based communication protocols, including fully device-independent distribution, towards goal internet.

Language: Английский

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

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(30)

Published: April 1, 2024

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

Language: Английский

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Purcell-enhanced single photons at telecom wavelengths from a quantum dot in a photonic crystal cavity

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Feb. 23, 2024

Quantum dots are promising candidates for telecom single photon sources due to their tunable emission across the different low-loss telecommunications bands, making them compatible with existing fiber networks. Their suitability integration into photonic structures allows enhanced brightness through Purcell effect, supporting efficient quantum communication technologies. Our work focuses on InAs/InP QDs created via droplet epitaxy MOVPE operate within telecoms C-band. We observe a short radiative lifetime of 340 ps, arising from factor 5, owing QD low-mode-volume crystal cavity. Through in-situ control sample temperature, we show both temperature tuning QD's wavelength and preserved purity at temperatures up 25K. These findings suggest viability QD-based, cryogen-free C-band sources, applicability in

Language: Английский

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