How to visualize a quantum transition of a single atom

Details How to visualize a quantum transition of a single atom How to visualize a quantum transition of a single atom

1997-08-28

arxiv.org/abs/quant-ph/9708053v1

Phys.Lett. A237 (1997) 1

Physics

Quantum Physics

LATEX, 15 pages, 2 figures (EPS), to be published in Phys. Let. A

Scientific paper

10.1016/S0375-9601(97)00737-8

The previously proposed visualization of Rabi oscillations of a single atom by a continuous fuzzy measurement of energy is specified for the case of a single transition between levels caused by a $\pi$-pulse of a driving field. An analysis in the framework of the restricted-path-integral approach (which reduces effectively to a Schr\"odinger equation with a complex Hamiltonian) shows that the measurement gives a reliable information about the system evolution, but the probability of the transition becomes less than unity. In addition an experimental setup is proposed for continuous monitoring the state of an atom by observation of electrons scattered by it. It is shown how this setup realizes a continuous fuzzy measurement of the atom energy.

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