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Quantum Chip Uses Guitar String Principle for Memory
16 Jul
Summary
- ETH Zurich built a quantum chip using vibrating resonators for memory.
- A superconducting qubit acts as the CPU, resonators as quantum RAM.
- The chip demonstrated universal gates and quantum algorithms.
A team at ETH Zurich has engineered a quantum chip employing a principle akin to a guitar string's vibrations for data storage. This breakthrough leverages microscopic acoustic resonators, specifically high-overtone bulk acoustic wave resonators (HBARs), to serve as quantum random-access memory (QRAM).
The chip designates a superconducting transmon qubit as its central processing unit (CPU). The HBAR's vibrational modes act as individual memory slots, enabling the qubit to read, manipulate, and write quantum states. This architecture mirrors classical computer design, separating processing and storage.
This novel approach offers advantages, including smaller chip sizes due to acoustic waves' short wavelengths. The system has undergone successful testing, including running essential quantum algorithms like the quantum Fourier transform and period finding. Researchers believe this could lead to significantly larger quantum memory capacities in future quantum computers.
