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O: Fachverband Oberflächenphysik

O 90: Electronic structure III

O 90.2: Vortrag

Donnerstag, 17. März 2011, 17:30–17:45, WIL C107

Bulk States Confinement as a Long Range Sensor for Impurities and a Quantum Information Transfer Channel — •Pavel Ignatiev, Oleg Brovko, and Valeriy Stepanyuk — Max-Planck-Institut für Mikrostrukturphysik, Halle, Germany

We show that confinement of bulk electrons can be observed at low-dimensional surface structures and can serve as a long range sensor for the magnetism and electronic properties of single impurities or as a quantum information transfer channel with large coherence lengths. Our ab-initio calculations reveal oscillations of electron density in magnetic chains on metallic surfaces and help to unambiguously identify the electrons involved as bulk electrons. We furthermore discuss a possibility to utilize bulk states confinement to transfer quantum information, encoded in an atom's species or spin, across distances of several nanometers with high efficiency.