Towards higher-dimensional structured light

Light Science & Applications, Год журнала: 2022, Номер 11(1)

Опубликована: Июль 5, 2022

Structured light refers to the arbitrarily tailoring of optical fields in all their degrees freedom (DoFs), from spatial temporal. Although orbital angular momentum (OAM) is perhaps most topical example, and celebrating 30 years since its connection structure light, control over other DoFs slowly gaining traction, promising access higher-dimensional forms structured light. Nevertheless, harnessing these new quantum classical states remains challenging, with toolkit still infancy. In this perspective, we discuss methods, challenges, opportunities for creation, detection, multiple We present a roadmap future development trends, fundamental research applications, concentrating on potential larger-capacity, higher-security information processing communication, beyond.

Язык: Английский

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One-step quantum secure direct communication

Science Bulletin, Год журнала: 2021, Номер 67(4), С. 367 - 374

Опубликована: Ноя. 4, 2021

Язык: Английский

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Long-Distance Entanglement Purification for Quantum Communication

Physical Review Letters, Год журнала: 2021, Номер 126(1)

Опубликована: Янв. 8, 2021

High-quality long-distance entanglement is essential for both quantum communication and scalable networks. Entanglement purification to distill high-quality from low-quality in a noisy environment it plays key role repeaters. The previous significant experiments require two pairs of entangled states were demonstrated table-top. Here we propose report high-efficiency using only one pair hyperentangled states. We also demonstrate its practical application entanglement-based distribution (QKD). One polarization spatial-mode hyperentanglement was distributed over 11 km multicore fiber (noisy channel). After purification, the fidelity arises 0.771 0.887 effective rate QKD increases 0 0.332. values Clauser-Horne-Shimony-Holt (CHSH) inequality 1.829 2.128. Moreover, by deterministic controlled-NOT gate, total efficiency can be estimated as 6.6x10^3 times than experiment with spontaneous parametric down-conversion (SPDC) sources. Our results offer potential implemented part full repeater large scale network.

Язык: Английский

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A programmable qudit-based quantum processor

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Март 4, 2022

Abstract Controlling and programming quantum devices to process information by the unit of dit, i.e., qudit, provides possibilities for noise-resilient communications, delicate molecular simulations, efficient computations, showing great potential enhance capabilities qubit-based technologies. Here, we report a programmable qudit-based processor in silicon-photonic integrated circuits demonstrate its enhancement computational parallelism. The monolithically integrates all key functionalities initialisation, manipulation, measurement two quart (ququart) states multi-value quantum-controlled logic gates with high-level fidelities. By reprogramming configuration processor, implemented most basic Fourier transform algorithms, quaternary, benchmark parallelism using qudits, which include generalised Deutsch-Jozsa Bernstein-Vazirani quaternary phase estimation fast factorization algorithms. monolithic integration high programmability have allowed implementations more than one million high-fidelity preparations, operations projections qudit processor. Our work shows an photonic technology computing enhanced capacity, accuracy, efficiency, could lead acceleration building large-scale computer.

Язык: Английский

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Quantum repeaters: From quantum networks to the quantum internet

Reviews of Modern Physics, Год журнала: 2023, Номер 95(4)

Опубликована: Дек. 20, 2023

Quantum technology is now at a point where practical work can begin on creating the quantum internet. However, numerous challenges must be overcome before this vision becomes reality. A global-scale internet requires development of repeater, device that stores and manipulates qubits while interacting with or emitting entangled photons. This review examines different approaches to repeaters networks, covering their conceptual frameworks, architectures, current progress in experimental implementation.

Язык: Английский

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Qutrit Randomized Benchmarking

Physical Review Letters, Год журнала: 2021, Номер 126(21)

Опубликована: Май 27, 2021

Ternary quantum processors offer significant potential computational advantages over conventional qubit technologies, leveraging the encoding and processing of information in qutrits (three-level systems). To evaluate compare performance such emerging hardware it is essential to have robust benchmarking methods suitable for a higher-dimensional Hilbert space. We demonstrate extensions industry standard randomized (RB) protocols, developed used extensively qubits, ternary logic. Using superconducting five-qutrit processor, we find an average single-qutrit process infidelity $3.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$. Through interleaved RB, characterize few relevant gates, employ simultaneous RB fully crosstalk errors. Finally, apply cycle two-qutrit CSUM gate obtain fidelity 0.85. Our results present RB-based tools qutrit general approach diagnose control errors future qudit hardware.

Язык: Английский

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Progress in quantum teleportation

Nature Reviews Physics, Год журнала: 2023, Номер 5(6), С. 339 - 353

Опубликована: Май 24, 2023

Язык: Английский

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Quantum structured light in high dimensions

APL Photonics, Год журнала: 2023, Номер 8(5)

Опубликована: Май 1, 2023

Structured light has become topical of late, where controlling in all its degrees freedom offered novel states long predicted, enhanced functionality applications, and a modern toolbox for probing fundamental science. Structuring as single photons entangled allows the spatial modes to be used encode large alphabet, accessing high dimensional Hilbert spaces tests quantum mechanics improved information processing tasks. In this tutorial, we outline basic concepts expressed basis (structured light) explain how create, control, detect such laboratory with focus on transverse orbital angular momentum pixel (position) modes. Finally, highlight some example applications structured light, from communications imaging.

Язык: Английский

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Entanglement-Assisted Quantum Networks: Mechanics, Enabling Technologies, Challenges, and Research Directions

IEEE Communications Surveys & Tutorials, Год журнала: 2023, Номер 25(4), С. 2133 - 2189

Опубликована: Янв. 1, 2023

Over the past few decades, significant progress has been made in quantum information technology, from theoretical studies to experimental demonstrations. Revolutionary applications are now limelight, showcasing advantages of technology and becoming a research hotspot academia industry. To enable have more profound impact wider application, interconnection multiple nodes through channels becomes essential. Building an entanglement-assisted network, capable realizing transmission between these nodes, is primary goal. However, networks governed by unique laws mechanics, such as superposition principle, no-cloning theorem, entanglement, setting them apart classical networks. Consequently, fundamental efforts required establish While some insightful surveys paved way for networks, most focus on enabling technologies applications, neglecting critical network issues. In response, this paper presents comprehensive survey Alongside reviewing mechanics technologies, provides detailed overview structure, working principles, development stages, highlighting differences Additionally, challenges building wide-area addressed. Furthermore, emphasizes open directions, including architecture design, entanglement-based issues, standardization, facilitate implementation future

Язык: Английский

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Two-Qutrit Quantum Algorithms on a Programmable Superconducting Processor

Physical Review Applied, Год журнала: 2023, Номер 19(6)

Опубликована: Июнь 7, 2023

Processing quantum information using three-level systems or qutrits as the fundamental unit is an alternative to contemporary qubit-based architectures with potential provide significant computational advantages. We demonstrate a fully programmable two-qutrit processor by utilizing third energy eigenstates of two transmons. develop parametric coupler achieve excellent connectivity in nine-dimensional Hilbert space enabling efficient implementations gates. characterize our realizing several algorithms like Deutsch-Jozsa, Bernstein-Vazirani, and Grover's search. Our hardware-efficient protocols allow us show that stages amplification can improve success rates unstructured search advantage. results pave way for building ternary processors transmons blocks universal computer.

Язык: Английский

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