Coherent tunneling and quantum coherence oscillations at the atomic level

Details Coherent tunneling and quantum coherence oscillations at the atomic level Coherent tunneling and quantum coherence oscillations at the atomic level

2008-02-20

arxiv.org/abs/0802.2781v1

Romanian Journ. Phys. 42, 509-518 (1997)

Physics

Quantum Physics

9 pages, 4 figures

Scientific paper

The evolution of the quantum wave packet describing an atom trapped in the surface-tip junction of the scanning tunneling microscope is investigated by using the time-dependent Schroedinger equation, and by a quasi-classical Hamiltonian approach. The estimates concern a Xe atom in a biased double-well junction potential. The exact treatment shows that quantum coherence oscillations of the metastable ground state may occur at particular resonant values of the bias voltage. The effect of decoherence by partial localization is studied within the quasi-classical frame.

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