Listen to how quantum atoms talk to each other
Researchers at EPFL have developed an acoustic metamaterial that can model quantum phenomena on a macro scale without destroying their fragile properties. The system opens up new perspectives for materials research, medical applications and an alternative form of quantum computing.
A scientific milestone is currently being created in the laboratories of the EPFL in Lausanne. An acoustic system that makes it possible to simulate quantum phenomena on an audible, macroscopic level. It was developed by PhD student Mathieu Padlewski together with researchers Hervé Lissek and Romain Fleury. The aim is to make the highly complex states of condensed matter accessible, not via electrons, but via sound waves.
Metamaterial as a research platform
The system is based on a so-called acoustic metamaterial, an artificial structure made up of 16 interconnected cubes. The researchers use integrated loudspeakers and microphones to generate and measure specific sound waves. These “acoustic atoms” can be flexibly configured to model a wide variety of physical phenomena, including those that lie beyond the realm of classical solid-state physics.
Schrödinger’s cat becomes audible
In contrast to real quantum waves, which are destroyed by every measurement, acoustic waves can be observed and analyzed directly. This allows the quantum concept of superposition, symbolized by Schrödinger’s cat, to be experienced in sound. Just as a voice consists simultaneously of fundamental frequency and harmonics, the EPFL system can make many “acoustic states” audible and measurable at the same time.
From physics to application
The potential fields of application range from the development of new types of energy control systems to medical diagnostics. The metamaterial could be tuned to specific frequencies, similar to the human inner ear. A possible way to research hearing disorders such as tinnitus. Even more ambitious is the long-term goal of an “acoustic analog computer”, which, inspired by quantum computing, could process information in superimposed states without risking its decay.
Switzerland as a location for innovation
This research highlights Switzerland’s role as a leading location for disruptive science. The combination of basic physics, technology and application visions impressively demonstrates the potential of interdisciplinary research. For investors, developers and innovation promoters, there are new opportunities to establish acoustic technologies as scalable alternatives in the fields of computing, sensor technology and materials technology.