An Acoustic Quantum Computer Listen Here

To overcome the limitations of quantum physics, researchers at EPFL have developed a new acoustic system to investigate how atoms in condensed matter interact. Their ultimate goal is to create an acoustic version of a quantum computer.

An EPFL report highlights the innovative work of PhD student Mathieu Padlewski, who, along with Hervé Lissek and Romain Fleury at EPFL’s Laboratory of Wave Engineering, has constructed a unique acoustic system for studying condensed matter and its macroscopic properties. This system allows researchers to explore phenomena beyond solid-state physics while avoiding the challenges associated with quantum mechanics.

The metamaterial created by the EPFL team features highly adjustable active elements that enable the synthesis of phenomena not typically found in nature. Padlewski explains, “We’ve essentially built a playground inspired by quantum mechanics that can be adjusted to study various systems. Potential applications include manipulating waves for telecommunications and potentially harnessing energy from waves in the future.”

By drawing an analogy to the unique spectrum of frequencies that make up a person’s voice, the researchers emphasize the complex nature of sound and its relationship to quantum physics. Just as a voice contains multiple frequencies that define its timbre, the acoustic system developed at EPFL can capture and manipulate a range of frequencies simultaneously, akin to a superposition of states in quantum mechanics.

Padlewski envisions a future where quantum probability waves can be modeled using sound, offering a new approach to studying electronic states in solid-state systems. The non-invasive nature of acoustics allows researchers to probe waves directly without perturbing the system, providing valuable insights without disrupting the state being studied.

The acoustic metamaterial at EPFL comprises a series of interconnected “acoustic atoms” that can be manipulated to control the propagation of sound waves. This innovative design, reminiscent of the structure and function of the cochlea in the human ear, holds promise for applications in studying hearing-related issues such as tinnitus.