A5065139460- Neural Networks and Reservoir Computing
- Quantum Information and Cryptography
- Photonic and Optical Devices
- Quantum Mechanics and Applications
- Quantum Computing Algorithms and Architecture
- Optical Network Technologies
- Advanced Fluorescence Microscopy Techniques
- Advanced Fiber Laser Technologies
- Random lasers and scattering media
- Semiconductor Lasers and Optical Devices
- Laser-Matter Interactions and Applications
- Nonlinear Optical Materials Studies
- Photorefractive and Nonlinear Optics
- Advanced Optical Sensing Technologies
- Cold Atom Physics and Bose-Einstein Condensates
Sapienza University of Rome
2015-2020
Boson Sampling is a computational task strongly believed to be hard for classical computers, but efficiently solvable by orchestrated bosonic interference in specialised quantum computer. Current experimental schemes, however, are still insufficient convincing demonstration of the advantage over computation. A new variation this task, Scattershot Sampling, leads an exponential increase speed device, using larger number photon sources based on parametric downconversion. This achieved having...
Abstract The identification of phenomena able to pinpoint quantum interference is attracting large interest. Indeed, a generalization the Hong–Ou–Mandel effect valid for any number photons and optical modes would represent an important leap ahead both from fundamental perspective practical applications, such as certification photonic devices, whose computational speedup expected depend critically on multi-particle interference. Quantum distinctive features have been predicted many particles...
New protocols based on machine-learning techniques can identify malfunctions in hardware used to demonstrate quantum supremacy, which is itself a critical milestone the road scalable universal computer.
Scaling-up optical quantum technologies requires to combine highly efficient multi-photon sources and integrated waveguide components.Here, we interface these scalable platforms: a dot based source reconfigurable photonic chip on glass are combined demonstrate high-rate three-photon interference.The temporal train of single-photons obtained from emitter is actively demultiplexed generate 3.8 kHz source, which then sent the input tuneable tritter circuit, demonstrating on-chip interference...
Photonic platforms represent a promising technology for the realization of several quantum communication protocols and experiments simulation. Moreover, large-scale integrated interferometers have recently gained relevant role restricted models computing, specifically with Boson Sampling devices. Indeed, various linear optical schemes been proposed implementation unitary transformations, each one suitable specific task. Notwithstanding, so far comprehensive analysis state art under broader...
Bosonic interference is a fundamental physical phenomenon, and it believed to lie at the heart of quantum computational advantage. It thus necessary develop practical tools witness its presence, both for reliable assessment source investigations. Here we describe how linear interferometers can be used unambiguously genuine n-boson indistinguishability. The amount violation proposed witnesses bounds degree multi-boson indistinguishability, which also provide novel intuitive model using set...
Photonic interference is a key quantum resource for optical computation, and in particular so-called boson sampling devices. In interferometers with certain symmetries, genuine multiphoton effectively suppresses sets of events, as the original Hong–Ou–Mandel effect. Recently, it was shown that some classical semi-classical models could be ruled out by identifying such suppressions Fourier interferometers. Here we propose suppression law suitable random-input experiments multimode Sylvester...
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...
Particle indistinguishability is at the heart of quantum statistics that regulates fundamental phenomena such as electronic band structure solids, Bose-Einstein condensation and superconductivity. Moreover, it necessary in practical applications linear optical computation simulation, particular for Boson Sampling devices. It thus crucial to develop tools certify genuine multiphoton interference between multiple sources. Our approach employs total variation distance find those transformations...
Quantum computers promise to be able solve tasks beyond the reach of standard computational platforms.Among others, photonic quantum walks prove great candidates for their implementation, since single photon sources, passive linear optics and photo-detectors are sufficient universal computation.To this aim, a device performing Fourier transform represents fundamental building block algorithms, whose applications not limited field computation.Recently, an algorithm has been developed...
Entanglement is a fundamental resource at the basis of quantum-enhanced performances in several applications, such as quantum algorithms and metrology. In these contexts, Fourier interferometers implement relevant class unitary evolutions which can be embedded large variety protocols. For instance, single-particle regime it adopted to transform, while multi-particle scenario employed generate states possessing useful entanglement for phase estimation purposes, or tool verify genuine...
The Majorization Principle is a fundamental statement governing the dynamics of information processing in optimal and efficient quantum algorithms. While computation can be modeled to reversible, due unitary evolution undergone by system, these algorithms are conjectured obey arrow time dictated Principle: probability distribution associated outcomes gets ordered step-by-step until achieving result computation. Here we report on experimental observation effects for two algorithms, namely...
The identification of phenomena able to pinpoint quantum interference is attracting large interest. Indeed, a generalization the Hong-Ou-Mandel effect valid for any number photons and optical modes would represent an important leap ahead both from fundamental perspective practical applications, such as certification photonic devices, whose computational speedup expected depend critically on multiparticle interference. Quantum distinctive features have been predicted many particles injected...
Particle indistinguishability is at the heart of quantum statistics that regulates fundamental phenomena such as electronic band structure solids, Bose-Einstein condensation and superconductivity. Moreover, it necessary in practical applications linear optical computation simulation, particular for Boson Sampling devices. It thus crucial to develop tools certify genuine multiphoton interference between multiple sources. Here we show so-called Sylvester interferometers are near-optimal task...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text T. Giordani, F. Flamini, M. Pompili, N. Viggianiello, Spagnolo, A. Crespi, R. Osellame, Wiebe, Walschaers, Buchleitner, and Sciarrino, "Experimental Statistical Signature of Many-body Quantum Interference," in Frontiers Optics / Laser Science, OSA Technical Digest (Optica Publishing Group, 2018), paper JTu3A.60. Export BibTex Endnote (RIS) HTML Plain alert Save article
We realize innovative 3D integrated optical interferometers performing the Quantum Fourier Transform. Injecting two-photon states, peculiar quantum interference effects are observed, thus enabling use of these devices for diagnostics photonic platforms.
The investigation of multi-photon quantum interference in symmetric multi-port splitters has both fundamental and applicative interest. Destructive devices with specific symmetry leads to the suppression a large number possible output states, generalizing Hong-Ou-Mandel effect; simple laws have been developed for interferometers implementing Fourier or Hadamard transform over modes. In fact, these enhanced features distribution can be used assess indistinguishability single-photon sources,...
Summary form only given. Recently, interference of multi-particle states has raised a strong interest in the scientific community, since it is believed to be at very heart post-classical computation. In this context, Boson Sampling [1] devices exploit multi-photon effects provide evidence superior quantum computational power with current state-of-the-art technology. Thus, capability correctly certify presence and find optimal platforms, becomes crucial task because expected numerous...
The progressive development of quantum technologies in many areas, ranging from investigation on foundamentals mechanics to information and computation, has increased the interest those problems that can exhibit a advantage. Boson Sampling problem is clear example where traditional computers fail task sampling distribution n indistinguishable photons after propagation m-mode optical interferometer. In this context, absence classical algorithms able simulate efficiently multi-photon...
Multi-photon interference is believed to have a fundamental role for obtaining quantum advantage. In this work we discuss reliable and efficient technique find signature of its presence in boson sampling experiments.