Jacob Holder

Abstract Revealing and quantifying entanglement of particles is central for understanding the foundations of quantum mechanics and its implications for modern technology. Recent works have demonstrated entanglement of free electrons and photons; however, the quantum properties of multiple free electrons, and the extent of their entanglement, remain largely unexplored. Here we investigate the degree of coherence and entanglement in a free-space electron beam in an ultrafast electron microscope.

The Ising model is one of the simplest and most well-established concepts to simulate phase transformations in complex materials. However, its most central constant, the interaction strength J between two nearest neighbors, is hard to obtain. Here we show how this basic constant can be determined with a fractal dimension analysis of measured domain structures.