In the world of quantum technology, an event has been recorded that could rewrite the rules for scaling future supercomputers. Scientists from the Swiss Federal Institute of Technology in Zurich (ETH Zurich) have developed the first chip in history that separates the functions of computation and information storage. This approach, borrowed from the architecture of classic personal computers, paves the way for creating faster and more compact quantum systems.

New Architecture vs. Old Limitations

Traditional quantum systems face a serious obstacle: in them, the functions of computation and data storage are performed by the same physical components. Such monolithic nature significantly complicates equipment scaling, making the creation of powerful quantum computers an extremely laborious process.

ETH Zurich specialists took the path of adapting the classic scheme. In their development, the central processing unit (CPU) takes on information processing, while random access memory (RAM) is responsible for its temporary storage. This functional distribution is implemented on a fundamentally new level:

  • Computations: A superconducting qubit is responsible for the rapid execution of nonlinear quantum-logical operations.
  • Storage: Mechanical resonators take on the function of holding quantum states.

Compactness and Coherence Preservation

The key advantage of the new architecture is the use of mechanical resonators. They are capable of maintaining multiple separate vibrational modes in a significantly smaller volume compared to classic electromagnetic analogs. This solves the problem of dimensions, which often hinders the development of quantum technologies.

Furthermore, vibrational modes possess a unique ability to hold quantum states for a long time. This is critically important for executing sequential commands without losing quantum coherence — a primary requirement for the stable operation of a quantum computer.

The dimensions of the experimental sample are impressive in their miniaturization: the chip is about 7.5 mm long, 2.5 mm wide, and only 1 mm high.

Successful Testing and Practical Potential

To prove that the theory works in practice, scientists conducted a series of experiments on the created chip. Scientists successfully performed two basic but fundamental procedures:

  • Quantum Fourier Transform.
  • Period-finding algorithm.

The experiment confirmed the possibility of precise control of phase operations and effective data exchange between the processor and different modes of mechanical memory. Data was transmitted without loss of quantum coherence, which became the main proof of the viability of the new architecture.

According to co-author of the study Igor Kladarich, the quantum Fourier transform is a basic block for most complex quantum algorithms. The successful execution of the period-finding algorithm vividly demonstrates that the system is ready to solve real-world tasks.

Prospects and Challenges

Although the presented development is a conceptual prototype, it opens the way to creating denser and more efficient quantum computing systems. The study, published in the prestigious journal Science, confirms that the path to the mass adoption of quantum technologies lies in the separation of functions.

However, developers will have to solve new tasks. The main challenge remains further scaling of the technology: it is necessary to increase the number of controlled modes and minimize the error level when expanding the chip architecture.