Regensburg 2004 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
TT: Tiefe Temperaturen
TT 22: Quantenkoh
ärenz und Quanteninformationssysteme I
TT 22.9: Vortrag
Mittwoch, 10. März 2004, 16:30–16:45, H19
Quantum Dissipative Dynamics of the Magnetic Resonance Force Microscope in the Single-Spin Detection Limit — •Hanno Gassmann1, Mahn-Soo Choi2, Hangmo Yi3, and Christoph Bruder1 — 1Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland — 2Department of Physics, Korea University, Seoul 136-701, Korea — 3Korea Institute for Advanced Study, 207-43 Cheongryang 2-dong, Seoul 130-722, Korea
We study a model of a magnetic resonance force microscope (MRFM) based on the cyclic adiabatic inversion technique as a high-resolution tool to detect single electron spins. We investigate the quantum dynamics of spin and cantilever in the presence of coupling to an environment. To obtain the reduced dynamics of the combined system of spin and cantilever, we use the Feynman-Vernon influence functional and get results valid at any temperature as well as at arbitrary system-bath coupling strength. We propose that the MRFM can be used as a quantum measurement device, i.e., not only to detect the modulus of the spin but also its direction.