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Optical polarization for ultrafast computing

Project description

Light-speed solutions for hard problems

As digital hardware nears its performance limits, traditional Von-Neumann computers struggle with complex combinatorial optimisation problems in fields like networks and AI. The need for alternative computing paradigms is urgent. With this in mind, the ERC-funded LOOP project explores ultrafast optical hardware for solving these problems. By harnessing the polarisation of light, LOOP creates an optical Ising machine that operates at picosecond speeds, dramatically faster than current systems. This approach uses polarisation as an ultrafast nonlinear oscillator to encode solutions, providing a scalable, parallel computing mechanism. With the potential to solve NP-hard optimisation problems in microseconds, LOOP is paving the way for a new era of optical computing that transcends the limitations of traditional electronics.

Objective

Computing impacts every aspect of modern science and society. Von-Neumann computers are inefficient in addressing important combinatorial optimizations widespread from networks to artificial intelligence. Finding alternative paradigms to tackle these intractable problems is now vital as digital hardware approaches its ultimate performance limit. A promising strategy maps the optimization in spin models implemented on a physical setup that evolves as a spin system to the solution. This fascinating scheme has recently attracted huge interest, leading to various electronic and optical Ising machines that, however, remain challenging to scale and speed up.

LOOP is an experimental proposal that aims at creating ultrafast optical hardware for combinatorial optimization by exploiting the polarization of light. The optical polarization is a new ingredient in computing that is absent in electronics. The original idea is to use the polarization as an ultrafast nonlinear oscillator that encodes the spin. We demonstrate the concept by controlling polarization bifurcation in third-order nonlinear crystals by electro-optics, enabling a low-power computing mechanism that operates at picosecond. The main goal is the realization of a polarization Ising machine that solves NP-hard optimization problems with thousands of spins in microseconds. The all-optical machine operates orders-of-magnitude faster than state-of-the-art digital and analog hardware. The scheme is fully parallel and scalable by combining polarization dynamics with spatial light modulation. Moreover, the vectorial nature of the polarization allows to surpass the binary operation of Ising machines. We exploit orbits on the Poincar sphere to realize an ultrafast XY machine for continuous optimization, opening a new direction in optical computing.
LOOP is an interdisciplinary program that spans from nonlinear optics to complex science to establish a new computing paradigm for optimization in the post-Moores law era.

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(opens in new window) ERC-2024-STG

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Host institution

UNIVERSITA DEGLI STUDI DI ROMA LA SAPIENZA
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 1 499 928,00
Address
Piazzale Aldo Moro 5
00185 Roma
Italy

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Region
Centro (IT) Lazio Roma
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 1 499 928,00

Beneficiaries (1)

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