A5010333064- Quantum Information and Cryptography
- Neural Networks and Reservoir Computing
- Quantum Computing Algorithms and Architecture
- Orbital Angular Momentum in Optics
- Photonic and Optical Devices
- Quantum Mechanics and Applications
- Optical Network Technologies
- Quantum optics and atomic interactions
- Optical Polarization and Ellipsometry
- Cold Atom Physics and Bose-Einstein Condensates
- Near-Field Optical Microscopy
- Semiconductor Quantum Structures and Devices
- Random lasers and scattering media
- Advanced Fluorescence Microscopy Techniques
- Photonic Crystals and Applications
- Semiconductor Lasers and Optical Devices
- Quantum and electron transport phenomena
- Digital Holography and Microscopy
- Spectroscopy Techniques in Biomedical and Chemical Research
- Plasmonic and Surface Plasmon Research
- Advanced Optical Sensing Technologies
- Advanced Optical Imaging Technologies
- Terahertz technology and applications
- Machine Learning and ELM
- Quantum-Dot Cellular Automata
Sapienza University of Rome
2017-2025
Italian Institute of Technology
2021-2022
Queen's University Belfast
2021
Structured light is attracting significant attention for its diverse applications in both classical and quantum optics. The so-called vector vortex beams display peculiar properties contexts due to the nontrivial correlations between optical polarization orbital angular momentum. Here we demonstrate a new, flexible experimental approach classification of beams. We first describe platform generating arbitrary complex inspired photonic walks. then exploit recent machine learning...
The capability to generate and manipulate quantum states in high-dimensional Hilbert spaces is a crucial step for the development of technologies, from communication computation. One-dimensional walk dynamics represents valid tool task engineering arbitrary states. Here we affirm such potential linear-optics platform that realizes discrete-time walks orbital angular momentum degree freedom photons. Different classes relevant qudit six-dimensional space are prepared measured, confirming...
Scattering phenomena affect light propagation through any kind of medium from free space to biological tissues. Finding appropriate strategies increase the robustness scattering is common requirement in developing both communication protocols and imaging systems. Recently, structured has attracted attention due its seeming resistance terms transmissivity spatial behavior. Moreover, correlation between optical polarization orbital angular momentum (OAM), which characterizes so-called vector...
Recent developments have led to the possibility of embedding machine learning tools into experimental platforms address key problems, including characterization properties quantum states. Leveraging on this, we implement a extreme in photonic platform achieve resource-efficient and accurate polarization state photon. The underlying reservoir dynamics through which such input evolves is implemented using coined walk high-dimensional orbital angular momentum performing projective measurements...
Abstract The launch of a satellite capable distributing entanglement through long distances and the first loophole-free violation Bell inequalities are milestones indicating clear path for establishment quantum networks. However, nonlocality in networks with independent sources has only been experimentally verified simple tripartite networks, via bilocality inequalities. Here, by using scalable photonic platform, we implement star-shaped consisting up to five distant nodes four sources. We...
Boson Sampling is a computational paradigm representing one of the most viable and pursued approaches to demonstrate regime quantum advantage. Recent results have demonstrated significant technological leaps in single-photon generation detection, leading progressively larger experimental instances experiments different photonic systems. However, crucial requirement for fully-fledged platform solving this problem capability implementing large-scale interferometers, that must simultaneously...
Abstract Quantum information processing is nowadays an established branch of quantum mechanics applications. Recent results in different areas, ranging from communications to computing, show that technologies are advancing towards being mature platforms with substantial advantages over traditional classical protocols. optics and photonic apparatuses one the best candidates for realization processors. In this context, integrated essential components miniaturisation such complex optical...
Blind-structured illumination microscopy (blind-SIM) enhances the optical resolution without requirement of nonlinear effects or pre-defined patterns. It is thus advantageous in experimental conditions where toxicity biological fluctuations are an issue. In this work, we introduce a custom convolutional neural network architecture for blind-SIM: BS-CNN. We show that BS-CNN outperforms other blind-SIM deconvolution algorithms providing improvement 2.17 together with very high Fidelity...
Engineering single-photon states endowed with orbital angular momentum (OAM) is a powerful tool for quantum information photonic implementations. Indeed, due to its unbounded nature, OAM suitable encoding qudits, allowing single carrier transport large amount of information. Most the experimental platforms employ spontaneous parametric down-conversion processes generate photons, even if this approach intrinsically probabilistic, leading scalability issues an increasing number qudits....
The orbital angular momentum (OAM) of light is an infinite-dimensional degree freedom with several applications in both classical and quantum optics. However, to fully take advantage the potential OAM states, reliable detection platforms characterize generated states experimental conditions are needed. Here, we present approach reconstruct input from measurements spatial intensity distributions they produce. To obviate issues arising intrinsic symmetry Laguerre-Gauss modes, employ a pair...
Quantum photonic processors are emerging as promising platforms to prove preliminary evidence of quantum computational advantage toward the realization universal computers. In context nonuniversal noisy intermediate devices, photonic-based sampling machines solving Gaussian boson (GBS) problem currently play a central role in experimental demonstration advantage. A relevant issue is validation process presence noise, such photon losses, which could undermine hardness simulating experiment....
The implementation of large-scale universal quantum computation represents a challenging and ambitious task on the road to processing information. In recent years, an intermediate approach has been pursued demonstrate computational advantage via non-universal models. A relevant example for photonic platforms provided by Boson Sampling paradigm its variants, which are known be computationally hard while requiring at same time only manipulation generated resources linear optics detection....
Quantum state preparation in high-dimensional systems is an essential requirement for many quantum-technology applications. The engineering of arbitrary quantum is, however, typically strongly dependent on the experimental platform chosen implementation, and a general framework still missing. Here we show that coined walks line, which represent enough to encompass variety different platforms, can be used superpositions walker's sites. We achieve this goal by identifying set conditions fully...
Quantum superposition of high-dimensional states enables both computational speed-up and security in cryptographic protocols. However, the exponential complexity tomographic processes makes certification these properties a challenging task. In this work, we experimentally certify coherence witnesses tailored for quantum systems increasing dimension using pairwise overlap measurements enabled by six-mode universal photonic processor fabricated with femtosecond laser writing technology....
Abstract Single-photon sources based on semiconductor quantum dots find several applications in information processing due to their high single-photon indistinguishability, on-demand generation, and low multiphoton emission. In this context, the generation of entangled photons represents a challenging task with possible solution relying interference probabilistic gates identical emitted at different pulses from
the same source. work, we implement approach via simple compact design...
Multi-mode optical interferometers represent the most viable platforms for successful implementation of several quantum information schemes that take advantage processing. Examples range from communication, sensing and computation, including neural networks, reservoir computing or simulation complex physical systems. The realization such routines requires high levels control tunability parameters define operations carried out by device. This requirement becomes particularly crucial in light...
Photon indistinguishability plays a fundamental role in information processing, with applications such as linear-optical quantum computation and metrology. It is then necessary to develop appropriate tools quantify the amount of this resource multiparticle scenario. Here we report four-photon experiment interferometer designed simultaneously estimate degree between three pairs photons. The design dispenses need heralding for parametric down-conversion sources, resulting an efficient reliable...
The Orbital Angular Momentum (OAM) of light has been at the center several classical and quantum applications for imaging, information processing communication. However, complex structure inherent in OAM states makes their detection classification nontrivial many circumstances. Most current schemes are based on models built upon use Laguerre-Gauss modes. this may not general be sufficient to capture full generated states. In paper, we go beyond assumption, employ Hypergeometric-Gaussian...
Experimental engineering of high-dimensional quantum states is a crucial task for several information protocols. However, high degree precision in the characterization noisy experimental apparatus required to apply existing quantum-state This often lacking practical scenarios, affecting quality engineered states. We implement, experimentally, an automated adaptive optimization protocol engineer photonic orbital angular momentum (OAM) The protocol, given target output state, performs online...
The generation and control of quantum correlations in high-dimensional systems is a major challenge the present landscape technologies. Achieving such non-classical resources will potentially unlock enhanced capabilities for cryptography, communication computation. We propose protocol that able to attain entangled states $d$-dimensional through quantum-walk-based {\it transfer \& accumulate} mechanism involving coin walker degrees freedom. choice investigating walks motivated by their...
Quantum coherence marks a deviation from classical physics, and has been studied as resource for metrology quantum computation. Finding reliable effective methods assessing its presence is then highly desirable. Coherence witnesses rely on measuring observables whose outcomes can guarantee that state not diagonal in known reference basis. Here we experimentally measure novel type of witness uses pairwise comparisons to identify superpositions basis-independent way. Our experiment single...
Optical interrogation of tissues is broadly considered in biomedical applications. Nevertheless, light scattering by tissue limits the resolution and accuracy achieved when investigating sub-surface features. Light carrying optical angular momentum or complex polarization profiles, offers different propagation characteristics through media compared to with unstructured beam profiles. Here we discuss behaviour structured scattered tissue-mimicking phantoms. We study spatial profile modes as a...
A Bernoulli factory is a randomness manipulation routine that takes as input random variable, outputting another variable whose bias function of the bias. Recently proposed quantum-to-quantum schemes encode both and output variables in qubit amplitudes. This primitive could be used sub-routine for more complex quantum algorithms involving Bayesian inference Monte Carlo methods. Here, we report an experimental implementation polarization-encoded photonic factory. We present test three...