Written by: Islam Al-Saqqa
Physicists have successfully conducted a groundbreaking experiment that reformulates our understanding of the laws of thermodynamics, by proving the ability of microscopic machines to extract useful energy from invisible information. The experiment, the results of which were published in the journal "Nature Physics", opens new horizons for developing nano-engines capable of operating without the need for traditional temperature differentials, which represents a qualitative leap in micro-energy sciences.
Exploiting Fluid Memory
The experiment was based on the historical concept of "Maxwell's Demon", a physical hypothesis that appeared in the nineteenth century which assumes the existence of an intelligent entity capable of manipulating particles to create thermal inequality without consuming energy. In this research, the researchers trapped a silica particle with a diameter of 2.7 microns inside a liquid using laser-operated optical tweezers. The team discovered that the liquid is not merely an inert medium, but contains a "memory" that forms as a result of the interaction of liquid particles with the movement of the particle, allowing information about the previous movements of the particle to be stored.
Information as a Physical Resource
The study confirmed that information itself represents a physical resource that can be converted into mechanical work. By taking precise measurements at specific time intervals, the scientists were able to deduce the state of the liquid's microscopic network, which is information that was previously considered "hidden". Thanks to this understanding, it became possible to direct this information stored in the fluid environment to extract additional energy, proving that the memory surrounding microscopic systems can act as a mechanical fuel.
The Future of Micro-Engines
These results are extremely important for the development of nano and micro-engines that operate in complex conditions, such as biological environments or fluids with complex structural properties. Although this technique is still in its early theoretical and experimental stages, it paves the way for overcoming the traditional reliance on external heat sources by harnessing fluctuations and surrounding environmental memory as an effective element in energy production. The researchers emphasize that this work remains fully compatible with the fundamental laws of physics, as the process of managing information and erasing redundant data consumes energy, which maintains the integrity of the second law of thermodynamics.
