A group of physicists from ETH Zurich, led by Yvonne Chu, has made a significant step forward in the field of quantum computing. The researchers have introduced an innovative quantum chip where the role of RAM is played not by traditional electromagnetic elements, but by mechanical resonators.

The architecture of this system is intuitive and resembles a classical computer: the central processing unit (CPU) here is a superconducting qubit, while the RAM is implemented on mechanical resonators. Data is encoded in the form of microscopic vibrations, similar to the vibration of a guitar string. Each unique vibration pattern corresponds to a separate memory cell. According to Chu, this separation of computing and memory functions makes the system more efficient and flexible.

Mechanical memory has several critical advantages over electromagnetic memory:

  • Miniaturization: Mechanical resonators are significantly more compact than their electromagnetic counterparts.
  • Compactness and performance: A chip measuring just 7.5 by 2.5 mm can support complex computational operations.
  • Increased quantum state lifetime: Quantum states represented as vibrations persist longer, significantly reducing the risk of data loss and making the system more stable.

The development has already been tested on complex algorithms. The chip successfully performed a quantum Fourier transform and a period-finding algorithm — key tasks for the functioning of future full-scale quantum computers. The experiment clearly demonstrated that the vibration-based architecture is suitable for creating programmable quantum systems.

Currently, the researchers are focused on testing the scalability of the technology. This is the first step toward turning the experimental setup into a practical computing platform.

Expert commentary: This approach addresses one of the fundamental problems of quantum computing — decoherence. Increasing the quantum state lifetime in mechanical memory could be the key to creating more stable and, consequently, more powerful quantum processors. If the technology scales successfully, we will witness a new phase in the evolution of computing technology, which could have a direct impact on cryptography and the security of blockchain networks.