ⓘ Massachusetts Institute of Technology
MIT engineers have turned waste heat, a common nuisance in electronics, into a computational resource. In a study published in the journal Physical Review Applied, researchers have uncovered microscopic silicon structures that can perform mathematical calculations using heat instead of electricity.
The research team, consisting of undergraduate student Caio Silva and research scientist Giuseppe Romano, created these structures using a technique called inverse design. By inputting the required features into a software system, the algorithm generated a complex silicon shape filled with pores, about the size of a dust particle. These structures direct heat flow and perform matrix-vector multiplication, the basic mathematics behind machine learning models such as large-scale language models (LLMs), with over 99% accuracy in simulations.
In most cases, performing calculations on electronic devices wastes heat. We often want to remove as much heat as possible. But here we took the opposite approach, using heat as a form of information itself to show that thermal computing is possible. — Caio Silvafirst author of the paper.
To overcome the physical limitation that heat only flows from hot to cold, the team split the target matrix into positive and negative components and processed them through separate structures. We also adjusted the thickness of the silicone to more precisely control heat transfer.
Although this technology faces hurdles in bandwidth and scaling for complex deep learning tasks, it has immediate potential in thermal management. This structure can autonomously detect overheating and temperature gradients in electronic devices without the need for external power sources or digital sensors. The team now aims to develop programmable structures capable of continuous operation.
Throughout my life, I have always been fascinated by and even addicted to technology and digital devices. I’m always amazed at the complexity of the simplest digital devices and systems around us. I’ve been writing and publishing online for about six years, but just over a year ago I found myself falling in love with the wonders of the smartphones and laptops we have in our hands every day. I developed a passion for learning about new devices and the technology that goes with them, and at some point I asked myself, “Why not get involved in writing about technology?” It’s no use saying that I followed up on that idea – it’s obvious. I am an open-minded person who finds endless joy in researching and discovering new information. I believe there is a lot to learn and life is very short, so I use my time wisely to learn new things. I’m a “bookworm” of the internet and digital devices. When I’m not writing, you can find me on your devices. I explore and admire the beauty of nature and living things. I am a quick learner, adapt quickly to change, and always look forward to new adventures.
