Massachusetts Institute of Technology

Tena Dubcek

Marin Soljacic

Charles Roques-Carmes

Yichen Shen

Li Jing

Scott A Skirlo

Hengameh Bagherianlemraski

John Dimitris Joannopoulos

Karl Kimon Berggren

Yi Yang

Ido Kaminer

Nicholas H Rivera

Phillip Donald Keathley

Steven E Kooi

Aviram Massuda

Yujia Yang

A photonic parallel network can be used to sample combinatorially hard distributions of Ising problems. The photonic parallel network, also called a photonic processor, finds the ground state of a general Ising problem and can probe critical behaviors of universality classes and their critical exponents. In addition to the attractive features of photonic networks—passivity, parallelization, high-speed and low-power—the photonic processor exploits dynamic noise that occurs during the detection process to find ground states more efficiently.

Optical Ising machines and optical convolutional neural networks

A photonic parallel network can be used to sample combinatorially hard distributions of Ising problems. The photonic parallel network, also called a photonic processor, finds the ground state of a general Ising problem and can probe critical behaviors of universality classes and their critical exponents. In addition to the attractive features of photonic networks&#x2014;passivity, parallelization, high-speed and low-power&#x2014;the photonic processor exploits dynamic noise that occurs during the detection process to find ground states more efficiently.

An apparatus for generating Smith-Purcell radiation having at least one spectral component at a wavelength &#x3bb; includes a periodic structure including a dielectric material and an electron source, in electromagnetic communication with the periodic structure, to emit an electron beam propagating within about 5&#x3bb; from a surface of the periodic structure to induce emission of the Smith-Purcell radiation. The electron beam has an electron energy tunable between about 0.5 keV and about 40 keV so as to change a wavelength of the Smith-Purcell radiation.

Apparatus and methods for generating and enhancing Smith-Purcell radiation

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Tena Dubcek