Franck-Condon Effect in Central Spin System

Details Franck-Condon Effect in Central Spin System Franck-Condon Effect in Central Spin System

2012-04-16

arxiv.org/abs/1204.3344v1

Physics

Quantum Physics

8 pages, 8 figures

Scientific paper

We study the quantum transitions of a central spin surrounded by a collective-spin environment. It is found that the influence of the environmental spins on the absorption spectrum of the central spin can be explained with the analog of the Franck-Condon (FC) effect in conventional electron-phonon interaction system. Here, the collective spins of the environment behave as the vibrational mode, which makes the electron to be transitioned mainly with the so-called "vertical transitions" in the conventional FC effect. The "vertical transition" for the central spin in the spin environment manifests as, the certain collective spin states of the environment is favored, which corresponds to the minimal change in the average of the total spin angular momentum.

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