A laser beam is split into dozens of thin filaments, passes through frosted glass, and reconverges to a single point. This is the workbench where the program took a seat. It received no instructions — only a general goal: figure out how light changes when passing through a scattering medium, and find something new.
The system, named Qiushi Engine, operates on two levels. The upper level is the strategist: it reads scientific papers, formulates hypotheses, and plans experiments. The lower level is the executor: it moves mirrors, records readings, and writes scripts. Between them flows a memory that resembles a lab notebook with bookmarks. This way, the agent never loses the thread, even in investigations spanning thousands of steps.
First, Qiushi Engine replicated a classic experiment with a transmission matrix — measuring how the wavefront of light is distorted by frosted glass. Then it translated the abstract theory of 'coherent order' into the language of real measurements and, for the first time, observed a structure that had previously only been calculated on paper. But the real breakthrough came later: during free exploration, the agent stumbled upon unusual beam behavior. Two light signals passing through the medium did not merely mix: they multiplied with each other. Almost like the attention mechanism in neural networks, where every word in a sentence relates to all others. This is optical bilinear interaction.
The agent not only proposed the idea but also assembled the setup, ran a series of tests, and confirmed that the effect is robust and reproducible. Now engineers have a hint on how to build optical accelerators for tasks that require rapid comparison of many paired features — from image analysis to language models. Light travels faster than electrons and barely heats the circuit. Such computers could be both swift and economical. And the workbench where the program sits might one day become a common sight in laboratories.
During its operation, Qiushi Engine generated 163 lab notes and 44 software scripts — roughly the amount of documentation a graduate student produces over six months of intensive work.
A similar plot appears in Ted Chiang's short story 'Story of Your Life,' where studying the physics of light leads to an unexpected technological breakthrough.