An Atoms Focused Approach 3rd Edition Pdf

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Shawana Kallhoff

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Aug 5, 2024, 11:26:15 AM8/5/24

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Needle-shaped atom probe specimens containing a single grain boundary were produced using the focused ion beam (FIB) of a two-beam FIB/SEM (scanning electron microscope) system. The presented specimen preparation approach allows the unprecedented study of a grain boundary which is well characterised in its crystallographic orientation by means of the field ion microscope (FIM) and the tomographic atom probe (TAP). The analysis of such specimens allows in particular the determination of solute excess atoms at this specific grain boundary and hence the investigation of the segregation behaviour. The crucial preparation steps are discussed in detail in the present study for the Sigma 19 a 331 110 grain boundary of a 40 at.ppm-Bi doped Cu bi-crystal. Transmission electron microscope (TEM) images and TAP analyses of the atom probe tips demonstrate unambiguously the presence of the selectively prepared grain boundary in the apex region of some of the specimens.

Laser cooling technique enable us to realize ultracold atomic gases in quantum degenerate regime and open a new field of "artificial quantum matter". My research interest is exploring ultracold atomic systems with large degrees of freedom and high controllability, which can be used to study various quantum phenomena that have been difficult to realize or observe in existing matters. Also, I am interested in "quantum simulation", namely, physical simulation of some quantum systems which are hard to solve numerically. In this seminar, I will introduce the laser cooling, ultracold atomic systems, and quantum simulation with ultracold atoms based on my previous studies. Then I will introduce and discuss about my current project, an experimental approach to "the black-hole information paradox", which could be related to quantum information and quantum chaos.