Filters








5,877 Hits in 3.7 sec

All-Optical Scalable Spatial Coherent Ising Machine

Marcello Calvanese Strinati, Davide Pierangeli, Claudio Conti
2021 Physical Review Applied  
Here, we propose an all-optical scalable CIM with fully-programmable coupling. Our setup consists of an optical parametric amplifier with a spatial light modulator (SLM) within the parametric cavity.  ...  These networks, called coherent Ising machines (CIMs), exploit the fact that the collective nonlinear dynamics of coupled oscillators can drive the system close to the global minimum of the classical Ising  ...  (a) All-optical spatial CIM.  ... 
doi:10.1103/physrevapplied.16.054022 fatcat:sknlxzlr45chbma6ddykhqybzy

Scalable spin-glass optical simulator [article]

Davide Pierangeli, Mushegh Rafayelyan, Claudio Conti, Sylvain Gigan
2020 arXiv   pre-print
Here we propose and realize an optical scalable spin-glass simulator based on spatial light modulation and multiple light scattering.  ...  By tailoring optical transmission through a disordered medium, we optically accelerate the computation of the ground state of large spin networks with all-to-all random couplings.  ...  ., A fully-programmable 100-spin coherent Ising machine with all-to-all connections, Science 354, 614 (2016). [6] T.  ... 
arXiv:2006.00828v1 fatcat:qcv5tqy2frb4jhvbo7gxg36n3a

Optical Networking Beyond WDM

Peter J. Winzer
2012 IEEE Photonics Journal  
At the beginning of a new era in optical communications, we review initial research in SDM technologies and address some of the key challenges ahead.  ...  Space-division multiplexing (SDM) is expected to further scale network capacities, using parallel strands of single-mode fiber, uncoupled or coupled cores of multicore fiber, or even individual modes of  ...  Acknowledgment The author is grateful for discussions with S. Chandrasekhar  ... 
doi:10.1109/jphot.2012.2189379 fatcat:2l2utljyk5ghrn4zbncvrnebky

Reconfigurable semiconductor laser networks based on diffractive coupling

Daniel Brunner, Ingo Fischer
2015 Optics Letters  
In information processing, laser networks are highly attractive for the implementation of either neuro-inspired computing [4, 5] or for all-optical Ising machines based on coherent computing [6] .  ...  Finally, we evaluate and confirm the scalability of our diffractive-coupling method. Our diffractive-optical network, illustrated in Fig.  ...  In information processing, laser networks are highly attractive for the implementation of either neuro-inspired computing [4, 5] or for all-optical Ising machines based on coherent computing [6] .  ... 
doi:10.1364/ol.40.003854 pmid:26274677 fatcat:j2xgudbrorgu7jq2fsjcb4qeoq

Large-Scale Photonic Ising Machine by Spatial Light Modulation

D. Pierangeli, G. Marcucci, C. Conti
2019 Physical Review Letters  
We design and experimentally demonstrate a large-scale optical Ising machine based on a simple setup with a spatial light modulator.  ...  Very recently, optical Ising machines have been demonstrated for computing the minima of spin Hamiltonians, paving the way to new ultra-fast hardware for machine learning.  ...  Optically solving the Ising Hamiltonian with all-to-all spin interactions.  ... 
doi:10.1103/physrevlett.122.213902 fatcat:xkfnwvhftradbiml6if7mcfg3y

Adiabatic evolution on a spatial-photonic Ising machine [article]

D. Pierangeli, G. Marcucci, C. Conti
2020 arXiv   pre-print
Novel optical platforms, known as coherent or photonic Ising machines, are attracting considerable attention as accelerators on optimization tasks formulable as Ising models.  ...  Although various Ising machines employ annealing in some form, adiabatic computing on optical settings has been only partially investigated.  ...  RESULTS Spin dynamics on a spatial-photonic Ising machine In a SPIM, a coherent wavefront encodes binary spin variables by spatial light modulation [48, 49] .  ... 
arXiv:2005.08690v1 fatcat:iepjyposnfdrfdazvhuvyjzfma

Noise-enhanced spatial-photonic Ising machine [article]

Davide Pierangeli, Giulia Marcucci, Daniel Brunner, Claudio Conti
2020 arXiv   pre-print
Recently, various photonics-based Ising machines demonstrated ultra-fast computing of Ising ground state by data processing through multiple temporal or spatial optical channels.  ...  By controlling the error rate at the detection, we introduce a noisy-feedback mechanism in an Ising machine based on spatial light modulation.  ...  ISING MACHINE BY SPATIAL LIGHT MODULATION In our Ising machine the spin variables are encoded on a coherent laser wavefront via binary values of the optical phase and processed by spatial light modulation  ... 
arXiv:2004.02208v1 fatcat:akaekly73jcdrc7n5r7acqkrb4

Noise-enhanced spatial-photonic Ising machine

Davide Pierangeli, Giulia Marcucci, Daniel Brunner, Claudio Conti
2020 Nanophotonics  
Recently, various photonics-based Ising machines demonstrated fast computing of a Ising ground state by data processing through multiple temporal or spatial optical channels.  ...  By controlling the error rate at the detection, we introduce a noisy-feedback mechanism in an Ising machine based on spatial light modulation.  ...  Ising machine by spatial light modulation In our Ising machine the spin variables are encoded on a coherent laser wavefront via binary values of the optical phase and processed by spatial light modulation  ... 
doi:10.1515/nanoph-2020-0119 fatcat:uxjed6c5ejhmzf2xjzk6s2cjam

RAPID: Reconfigurable and Scalable All-Photonic Interconnect for Distributed Shared Memory Multiprocessors

A.K. Kodi, A. Louri
2004 Journal of Lightwave Technology  
Index Terms-Cache coherence, distributed shared memory, optical interconnects, scalable optical networks.  ...  RAPID is wavelength-routed, permitting the same limited set of wavelength to be reused among all processors.  ...  An example of the state-of-the-art DSM machine is the SGI Origin 2000 [3] which can scale up to 512 nodes.  ... 
doi:10.1109/jlt.2004.833249 fatcat:xisqf3pcsbd6verftgm7yzwaae

Adiabatic evolution on a spatial-photonic Ising machine

Davide Pierangeli, Giulia Marcucci, Claudio Conti
2020 Optica  
Novel optical platforms, known as coherent or photonic Ising machines, are attracting considerable attention as accelerators on optimization tasks formulable as Ising models.  ...  Although various Ising machines employ annealing in some form, adiabatic computing on optical settings has been only partially investigated.  ...  Spin Dynamics on a Spatial-Photonic Ising Machine In a SPIM, a coherent wavefront encodes binary spin variables by spatial light modulation [48] .  ... 
doi:10.1364/optica.398000 fatcat:kzzfawr4ujcsxhuggd5rhvicei

Functional quantum computing: An optical approach

Timothy M. Rambo, Joseph B. Altepeter, Prem Kumar, G. Mauro D'Ariano
2016 Physical Review A  
Here we propose an optical device which implements this type of coherent operator permutation. This device requires only one physical implementation of each operator to be permuted.  ...  One such quantum meta-operator takes N unitary transformations as input, coherently permutes their ordering, and outputs a new composite operator which can be applied to a quantum state.  ...  The two-input, two-output, all-optical, fiber-based switch is a modified nonlinear optical loop mirror (NOLM) [24] whose reflectivity is controlled via cross-phase modulation generated by an optical  ... 
doi:10.1103/physreva.93.052321 fatcat:2iegcrvyofcuteh7cwuqx752my

Parallel optical interconnection network for address transactions in large-scale cache coherent symmetric multiprocessors

A. Louri, A.K. Kodi
2003 IEEE Journal of Selected Topics in Quantum Electronics  
Index Terms-Cache coherence, parallel optical interconnects, scalable optical networks, symmetric multiprocessors (SMPs).  ...  An overview of the proposed optical implementation of SYMNET is presented along with the theoretical power budget and bit-error rate analysis.  ...  Hence, the first criteria of coherence that write requests be propagated to all processors is satisfied since at any request read/write is broadcast to all processors.  ... 
doi:10.1109/jstqe.2003.814189 fatcat:jhzaixjtmrc4no35zjsnklffja

Probing Transverse Coherence with the Heterodyne Speckle Approach: Overview and Perspectives

M. Manfredda, M.D. Alaimo, M. Giglio, M.A.C. Potenza
2015 Physics Procedia  
The properties of spatial coherence of radiation emitted by relativistic electrons is far from being trivial.  ...  , 4) is scalable over a wide range of wavelengths.  ...  Petrillo and all the SPARC staff who made the measure possible with FEL radiation.  ... 
doi:10.1016/j.phpro.2015.02.011 fatcat:pljzovgor5bp3nwyyflxwb3ggm

Photonic extreme learning machine by free-space optical propagation

Davide Pierangeli, Giulia Marcucci, Claudio Conti
2021 Photonics Research  
Our findings point out an optical machine learning device that is easy to train, energetically efficient, scalable, and fabrication-constraint free.  ...  Here, we present a neuromorphic photonic scheme, i.e., the photonic extreme learning machine, which can be implemented simply by using an optical encoder and coherent wave propagation in free space.  ...  Here, we propose a photonic extreme learning machine (PELM) for performing classification and regression tasks using coherent light.  ... 
doi:10.1364/prj.423531 fatcat:do6rbtjcfbgwlmexf63bieuk24

Guest Editorial Latest Advances in Optical Networks for 5G Communications and Beyond

Massimo Tornatore, Elaine Wong, Zuqing Zhu, Ramon Casellas, Balagangadhar G. Bathula, Lena Wosinska
2021 IEEE Journal on Selected Areas in Communications  
Index Terms-Optical networks, machine learning, fronthaul, telemetry, free space optics, physical layer security, software-defined networking (SDN), network functions virtualization (NFV).  ...  In this introduction, a brief overview of the field is given, followed by a summary of the seventeen papers of this Special Issue, and a discussion of future directions in the field.  ...  Autonomous and Data-Driven Network Management Network automation based on a novel data-driven machine-learning solution is penetrating all network segments, and management in optical networks, in particular  ... 
doi:10.1109/jsac.2021.3094600 fatcat:niz7sfnzwna7bere75npjqypjq
« Previous Showing results 1 — 15 out of 5,877 results