Tuesday 08 April 2025
A team of scientists has made a significant breakthrough in understanding how high-energy particles can affect the behavior of superconducting quantum computers. These powerful machines are being developed to perform complex calculations and store large amounts of data, but they’re also prone to errors caused by radiation from the environment.
The researchers used a unique approach to study this phenomenon. They designed an experiment where they could control the amount of energy deposited into the computer’s substrate by bombarding it with gamma rays. This allowed them to simulate the effects of cosmic rays and other forms of environmental radiation on the device.
The team found that when high-energy particles interacted with the computer’s substrate, it created a cascade of electron-hole pairs and phonons – tiny vibrations in the material. These excitations changed the local charge environment for qubits (the fundamental units of quantum information) near the impact site, leading to errors in their operation.
To study this further, the scientists developed a system to monitor the behavior of individual qubits as they processed information. They used this setup to measure the rate at which errors occurred and how it related to the amount of energy deposited into the substrate.
The results showed that even small amounts of energy could cause significant errors in the qubits’ operation. This is problematic because current error correction techniques may not be sufficient to mitigate these effects, especially for large-scale quantum computers.
To combat this issue, the researchers propose using materials with lower energy gaps – the amount of energy required to create an electron-hole pair – to reduce the impact of radiation on the devices. They also suggest designing qubits that are more resilient to errors caused by radiation.
These findings have significant implications for the development of practical quantum computers. As these machines become more complex and widespread, they’ll need to be able to withstand the effects of environmental radiation if we’re going to realize their potential. This research is an important step towards creating devices that can operate reliably in a variety of environments.
The team’s work also highlights the importance of understanding how different materials and designs can affect the behavior of qubits. By studying the interactions between high-energy particles and superconducting circuits, scientists can develop more robust and reliable quantum computers that can process complex information with unprecedented accuracy.
Cite this article: “Cosmic Rays Threaten Quantum Computers: Study Reveals Impact on Superconducting Qubits”, The Science Archive, 2025.
Quantum Computers, Superconducting Circuits, Radiation Effects, Error Correction, Qubits, Electron-Hole Pairs, Phonons, Cosmic Rays, Environmental Radiation, High-Energy Particles
