Quantum Computer to Power New Electron Microscope

Scientists are developing an electron microscope that integrates with a quantum computer to extract more information from each electron. This new approach could allow researchers to image fragile samples with greater clarity using fewer electrons. Conventional electron microscopes primarily count electrons to form images, often overlooking additional quantum information carried by each electron.

Researchers at TU Wien, in collaboration with teams from the University of Vienna, JKU Linz, and the University of Innsbruck, aim to capture and process this previously unused quantum data. The goal is to produce clearer images while minimizing electron exposure, which is crucial for delicate biological materials that are easily damaged by current methods. A prototype of this quantum computer-enhanced electron microscope is currently under construction at TU Wien.

The core of the innovation involves linking electrons to a quantum computer built with trapped ions. As electrons pass through the microscope, they can interact with these ions, creating quantum entanglement. This entanglement allows information about the electron to be stored within the ion, effectively transferring quantum states between them. By performing specific quantum computing operations, the system can combine data from multiple electrons.

This method allows for the optimal combination of information from several electrons, yielding a stronger signal from a smaller number of electrons. Algorithms developed at JKU Linz guide this processing. The quantum computer can transform weak signals, which would otherwise be indistinguishable from noise in traditional electron microscopy, into clear and useful data. This capability could overcome statistical limitations inherent in conventional electron microscopes.

The research team has demonstrated the theoretical advantages of this new method. The next phase involves experimental validation, with preparations underway at TU Wien's University Service Center for Transmission Electron Microscopy (USTEM) to integrate an ion-based quantum computer from the University of Innsbruck. This project aims to establish a new paradigm in electron microscopy, enabling more detailed observations with reduced sample damage.