Roadmap on spatiotemporal light fields

Journal of Optics, Journal Year: 2023, Volume and Issue: 25(9), P. 093001 - 093001

Published: July 6, 2023

Abstract Spatiotemporal sculpturing of light pulse with ultimately sophisticated structures represents a major goal the everlasting pursue ultra-fast information transmission and processing as well ultra-intense energy concentration extraction. It also holds key to unlock new extraordinary fundamental physical effects. Traditionally, spatiotemporal pulses are always treated spatiotemporally separable wave packet solution Maxwell’s equations. In past decade, however, more generalized forms nonseparable started emerge growing importance for their striking This roadmap intends highlight recent advances in creation control increasingly complex sculptured pulses, from states, diverse geometric topological structures, presenting bird’s eye viewpoint on zoology fields outlook future trends open challenges.

Language: Английский

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Metrology with a twist: probing and sensing with vortex light

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: Jan. 1, 2025

Optical metrology is a well-established subject, dating back to early interferometry techniques utilizing light's linear momentum through fringes. In recent years, significant interest has arisen in using vortex light with orbital angular (OAM), where the phase twists around singular space or time. This expanded metrology's boundaries encompass highly sensitive chiral interactions between and matter, three-dimensional motion detection via rotational Doppler effects, modal approaches surpassing resolution limit for improved profiling quantification. The intricate structure of light, combined integration artificial intelligence into optical metrology, unlocks new paradigms expanding measurement frameworks additional degrees freedom, offering potential more efficient accurate sensing metrological advancements. review aims provide comprehensive overview advances future trends structured specifically focusing on how beams revolutionized remote sensing, transitioning from classical quantum approaches.

Language: Английский

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Topological rejection of noise by quantum skyrmions

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: March 26, 2025

An open challenge in the context of quantum information processing and communication is improving robustness to environmental contributions noise, a severe hindrance real-world scenarios. Here, we show that skyrmions their nonlocal topological observables remain resilient noise even as typical entanglement witnesses measures state decay. This allows us introduce notion digitization based on our discrete observables, foregoing need for entanglement. We compliment experiments with full theoretical treatment unlocks mechanisms behind behavior, explaining why topology leads robustness. Our approach holds exciting promise intrinsic resilience through topology, highly applicable systems such global networks noisy computers. Recent work reported non-local entangled photons skyrmionic topology. Here authors demonstrate theoretically experimentally properties this system are decay, elucidate

Language: Английский

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Quantum cryptography with structured photons

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 124(11)

Published: March 11, 2024

Quantum photonic platforms have proven to be essential in realizing fundamentally secure quantum transfer of information, with commercially ready systems already deployed municipal and terrestrial links. The drive toward higher bit rates robustness eavesdropping noisy channels has focused attention on moving from the present two-dimensional states polarization, harnessing all light's degrees freedom for multi-dimensional coding structured photons. In this Perspective, we outline state-of-the-art achieving control spatial modes light, both as single photon entangled states, highlight open challenges that remain, consider roadmap might see its full potential realized.

Language: Английский

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Quantum Ghost Imaging by Sparse Spatial Mode Reconstruction

Advanced Quantum Technologies, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

Abstract In a conventional quantum imaging experiment, the image of object is retrieved directly with single photon camera technology, or computationally single‐pixel detector and pixelated projective masks. all these approaches, resolution dictated by pixel detection devices. this paper, traditional spatial basis pixels replaced modes, exploiting their unique features to enhance fidelity improve reconstruction accuracy through modal sparsity. This approach can be used even when modes are not orthogonal, demonstrating principle highly efficient phase‐only approximations basis. By numerical simulation experimental analysis, advantages illustrated, which include faster convergence object, higher signals fidelity, demonstrated an order magnitude less masks than approaches for same in outcome. Unlike pixels, detectors, opening path high‐resolution complex objects.

Language: Английский

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Unlocking the high dimensional’ potential: Comparative analysis of qubits and qutrits in variational quantum neural networks

Neurocomputing, Journal Year: 2025, Volume and Issue: 623, P. 129404 - 129404

Published: Jan. 13, 2025

Language: Английский

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Advances in Quantum Imaging with Machine Intelligence

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(8)

Published: March 21, 2024

Abstract Quantum imaging exemplifies the fascinating and counter‐intuitive nature of quantum world, where non‐local correlations are exploited for objects by remote non‐interacting photons. The field has exploded late, driven advances in our fundamental understanding these processes, but also technology, instance, efficient single photon detectors cameras. Accelerating progress is nascent intersection with artificial intelligence machine learning, promising enhanced speed quality images. This review provides a comprehensive overview rapidly evolving specific focus on ghost learning techniques. seminal made to date open challenges highlighted, likely trajectory future outlined.

Language: Английский

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Quantum metaphotonics: Recent advances and perspective

Deleted Journal, Journal Year: 2024, Volume and Issue: 1(2)

Published: April 15, 2024

Quantum metaphotonics has emerged as a cutting-edge subfield of meta-optics employing subwavelength resonators and their planar structures, such metasurfaces, to generate, manipulate, detect quantum states light. It holds great potential for the miniaturization current bulky optical elements by developing design on-chip systems various applications technologies. Over past few years, this field witnessed surge intriguing theoretical ideas, groundbreaking experiments, novel application proposals. This Perspective aims summarize most recent advancements also provides perspective on further progress in rapidly research.

Language: Английский

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Spin and orbital angular momentum of coherent photons in a waveguide

Frontiers in Physics, Journal Year: 2023, Volume and Issue: 11

Published: July 25, 2023

Spin angular momentum of a photon corresponds to polarisation degree freedom lights, and such that various properties are coming from macroscopic manifestation quantum-mechanical lights. An orbital lights is also manipulated form vortex with momentum, which quantised. However, it considered spin cannot be split the total in gauge-invariant way. Here, we revisit this issue for coherent monochromatic ray laser source, propagating waveguide. We obtained helical components by correspondence classical Ponyting vector. By applying standard quantum field theory using state, gauge-independent expressions operators. During derivations, was essential take finite cross-sectional area into account, leads longitudinal component along direction propagation, allows splitting. Therefore, mode profile responsible justify splitting, not possible as far were plane-wave expansions quantum-electrodynamics (QED). Our results suggest well-defined freedoms at least photons waveguide vacuum profile.

Language: Английский

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Quantum commutation relationship for photonic orbital angular momentum

Frontiers in Physics, Journal Year: 2023, Volume and Issue: 11

Published: Oct. 13, 2023

Orbital Angular Momentum (OAM) of photons are ubiquitously used for numerous applications. However, there is a fundamental question whether photonic OAM operators satisfy standard quantum mechanical commutation relationship or not; this also poses serious concern on the interpretation an optical vortex as degree freedom. Here, we examined canonical angular momentum defined in cylindrical coordinates, and applied them to Laguerre-Gauss (LG) modes graded index (GRIN) fibre. We confirmed validity LG found that ladder work properly with increment decrement units Dirac constant ( ℏ ). With those operators, calculated quantum-mechanical expectation value magnitude momentum, which includes contributions from both intrinsic extrinsic OAM. The obtained results suggest characterised by exhibits well-defined

Language: Английский

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