Ultrafast Emission and Detection of a Single-Electron Gaussian Wave Packet: A Theoretical Study

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Generating and detecting a prescribed single-electron state is an important step towards solid-state fermion optics. We propose how to generate an electron in a Gaussian state, using a quantum-dot pump with gigahertz operation and realistic parameters. With the help of a strong magnetic field, the electron occupies a coherent state in the pump, insensitive to the details of nonadiabatic evolution. The state changes during the emission from the pump, governed by competition between the Landauer-Buttiker traversal time and the passage time. When the former is much shorter than the latter, the emitted state is a Gaussian wave packet. The Gaussian packet can be identified by using a dynamical potential barrier, with a resolution reaching the Heisenberg minimal uncertainty (h) over bar = 2
Publisher
AMER PHYSICAL SOC
Issue Date
2016-09
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW LETTERS, v.117, no.14, pp.146802

ISSN
0031-9007
DOI
10.1103/PhysRevLett.117.146802
URI
http://hdl.handle.net/10203/214287
Appears in Collection
PH-Journal Papers(저널논문)
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