Optical computing takes advantage of the speed of light to perform vector-matrix operations more efficiently. By utilizing the principles of light interference, parallel computations can be achieved, a crucial aspect of quantum computing algorithms. This innovative approach enhances processing speed and efficiency.
A recent study conducted by physicists from the University of the Witwatersrand (Wits) has combined quantum computing with classical structured light. They have developed a cutting-edge computing system using laser beams and everyday display technology, representing a significant advancement in the pursuit of more powerful quantum computing solutions.
The researchers tapped into the unique properties of light for their work.
Dr. Isaac Nape, the Optica Emerging Leader Chair in Optics at Wits, explained, “Unlike traditional computers that operate based on binary decisions, our approach leverages laser beams to process multiple possibilities simultaneously, significantly boosting computing power.”
The system created by the researchers consists of laser beams, digital displays, and simple lenses. The breakthrough in optical computing lies in the integration of how light interacts with optical devices, such as digital displays and lenses, with the mathematical operations involved in quantum computing.
These operations, which primarily involve multiplication and addition using vectors and matrices, are carried out at the speed of light. This advancement was exemplified through the Deutsch-Jozsa algorithm, which determines whether a computer’s operation is random or predictable. Quantum computers excel at solving this problem much faster than classical computers, highlighting the potential of optical computing for achieving quantum speed.
MSc student Mwezi Koni mentioned that this work could even simulate more complex quantum algorithms, unlocking new opportunities in fields like quantum optimization and quantum machine learning.
Koni stated, “Our system can handle 16 different levels of information, as opposed to the binary system used in classical computers. Theoretically, we could scale this up to manage millions of levels, revolutionizing the processing of complex information.”
This development is particularly noteworthy due to its accessibility. The system utilizes readily available equipment, making it a practical option for research laboratories with limited access to expensive computing technologies.
MSc student Hadrian Bezuidenhout commented, “Light is an ideal medium for this type of computing. It moves at incredible speeds and can process multiple calculations simultaneously, making it ideal for tackling complex problems that would take traditional computers significantly longer to solve.”
Journal Reference:
- Mwezi Koni, Hadrian Bezuidenhout, and Isaac Nape. Emulating quantum computing with optical matrix multiplication. APL Photonics. https://doi.org/10.1063/5.0230335
