"... A team ... has now developed a way to make use of the quantum information carried by electrons in an electron microscope: The electron beam is coupled to a quantum computer, opening up entirely new possibilities for working with the quantum information of the electrons.
This is particularly important for sensitive samples that cannot be bombarded with arbitrarily large numbers of electrons. ..."
"... “Today, we can image tiny details on the atomic scale,” ... “However, this requires a large number of electrons. And not every sample can be exposed to so many electrons without being damaged. This is often a problem, particularly when imaging biological samples such as individual proteins.” ...
If, however, more information can be extracted from each individual electron than before, a smaller number of electrons is sufficient. The team has now found a method to achieve precisely this ..."
From the abstract:
"Freely propagating electrons may serve as quantum probes that can become coherently correlated with other quantum systems, offering access to advanced metrological resources.
We propose a setup that coherently couples free electrons in an electron microscope to a trapped-ion quantum processor, enabling non-destructive, quantum-coherent detection and the accumulation of information across multiple electrons. Our analysis shows that single electrons can induce resolvable qubit excitations, establishing a platform for practical applications such as quantum-enhanced, dose-efficient electron microscopy."
The Quantum Computer Microscope (original news release) "A new invention is set to significantly improve electron microscopy: a small quantum computer is integrated directly into the microscope."
Coupling free electrons to a trapped-ion quantum computer (preprint, open access)
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