dorsal/arxiv
View SchemaSome Non-Perturbative and Non-Linear Effects in Laser-Atom Interaction
| Authors | Qi-Ren Zhang |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0608048 |
| URL | https://arxiv.org/abs/quant-ph/0608048 |
Abstract
We show that if the laser is intense enough, it may always ionize an atom or induce transitions between discrete energy levels of the atom, no matter what is its frequency. It means in the quantum transition of an atom interacting with an intense laser of circular frequency $\omega$, the energy difference between the initial and the final states of the atom is not necessarily being an integer multiple of the quantum energy $\hbar\omega$. The absorption spectra become continuous. The Bohr condition is violated. The energy of photoelectrons becomes light intensity dependent in the intense laser photoelectric effect. The transition probabilities and cross sections of photo-excitations and photo-ionizations are laser intensity dependent, showing that these processes cannot be reduced to the results of interactions between the atom and separate individual photons, they are rather the processes of the atom interacting with the laser as a whole. The interaction of photons on atoms are not simply additive. The effects are non-perturbative and non-linear. Some numerical results for processes between hydrogen atom and intense circularly polarized laser, illustrating the non-perturbative and non-linear character of the atom-laser interaction, are given.
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"abstract": "We show that if the laser is intense enough, it may always ionize an atom or\ninduce transitions between discrete energy levels of the atom, no matter what\nis its frequency. It means in the quantum transition of an atom interacting\nwith an intense laser of circular frequency $\\omega$, the energy difference\nbetween the initial and the final states of the atom is not necessarily being\nan integer multiple of the quantum energy $\\hbar\\omega$. The absorption spectra\nbecome continuous. The Bohr condition is violated. The energy of photoelectrons\nbecomes light intensity dependent in the intense laser photoelectric effect.\nThe transition probabilities and cross sections of photo-excitations and\nphoto-ionizations are laser intensity dependent, showing that these processes\ncannot be reduced to the results of interactions between the atom and separate\nindividual photons, they are rather the processes of the atom interacting with\nthe laser as a whole. The interaction of photons on atoms are not simply\nadditive. The effects are non-perturbative and non-linear. Some numerical\nresults for processes between hydrogen atom and intense circularly polarized\nlaser, illustrating the non-perturbative and non-linear character of the\natom-laser interaction, are given.",
"arxiv_id": "quant-ph/0608048",
"authors": [
"Qi-Ren Zhang"
],
"categories": [
"quant-ph"
],
"title": "Some Non-Perturbative and Non-Linear Effects in Laser-Atom Interaction",
"url": "https://arxiv.org/abs/quant-ph/0608048"
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