Proton-hydrogen-atom scattering in a nearly resonant laser field

1984 ◽  
Vol 30 (5) ◽  
pp. 2752-2755 ◽  
Author(s):  
H. Bachau ◽  
Robin Shakeshaft
Keyword(s):  
Hydrogen Atom ◽  
Laser Field ◽  
Atom Scattering ◽  
Resonant Laser

Electron-atom scattering in a resonant laser field

1988 ◽  
Vol 38 (5) ◽  
pp. 2317-2321 ◽  
Author(s):  
K. Unnikrishnan
Keyword(s):  
Laser Field ◽  
Electron Atom ◽  
Atom Scattering ◽  
Resonant Laser

scholarly journals Hydrogen atom in 2s state in a laser field

2012 ◽  
Vol 10 (1) ◽  
pp. 13-20
Author(s):  
Svetlana Vucic
Keyword(s):  
Hydrogen Atom ◽  
Laser Field ◽  
Floquet Theory ◽  
Initial State ◽  
Electronic Density ◽  
Low Intensity ◽  
Resonance Wave ◽  
Resonant Laser ◽  
Linearly Polarized ◽  
Distant Part

The hydrogen atom in the 2s state exposed to a linearly polarized laser field is studied by using the non-perturbative non-Hermitian Floquet theory. The electronic density of the quasi-energy H(2s) state versus the electron coordinate is analyzed. We conclude that the decay of an atom in a low-intensity non-resonant laser field occurs from the asymptotically distant part of the initial state. On the other hand, the process of electron emission in a resonant laser field is governed by the excited-bound-statepart of the resonance wave function. With an increase in the intensity and by increasing the degree of excitation of the initial state not too high, the electron is ionized at smaller distances from the nucleus.

Relativistic proton-impact excitation of hydrogen atom in the presence of intense laser field

2016 ◽  
Vol 94 (7) ◽  
pp. 645-650 ◽  
Author(s):  
E. Hrour ◽  
S. Taj ◽  
A. Chahboune ◽  
B. Manaut
Keyword(s):  
Hydrogen Atom ◽  
Laser Field ◽  
Intense Laser ◽  
Impact Excitation ◽  
Theoretical Treatment ◽  
Hydrogen Atoms ◽  
Proton Impact ◽  
Atom Scattering ◽  
Specific Calculations ◽  
Incoming Proton

A theoretical treatment, using the first Born approximation, is presented to analyse the results of relativistic laser-assisted proton – hydrogen atom scattering. Specific calculations are carried out for excitation of hydrogen atoms from 1s1/2 to 2s1/2 states by proton impact. We work in an approximation in which the incoming proton may be described by Dirac–Volkov states in the presence of a laser field. Semi-relativistic Darwin wave functions are used to describe the hydrogen atom in its initial and final states, while relativistic, spin, and laser interaction effects are also accounted for. The results presented in this paper show that the differential cross section for this process depends not only upon the energy of the incident proton, but also upon its interaction with the laser field through intensity and frequency.

Erratum: Theory of electron - hydrogen-atom collisions in the presence of a laser field

1982 ◽  
Vol 25 (6) ◽  
pp. 3429-3429 ◽  
Author(s):  
H. S. Brandi ◽  
Belita Koiller ◽  
L. C. M. Miranda ◽  
J. J. Castro
Keyword(s):  
Hydrogen Atom ◽  
Laser Field

Cooling and trapping of atoms and molecules by a resonant laser field

1976 ◽  
Vol 19 (1) ◽  
pp. 72-75 ◽  
Author(s):  
V.S. Letokhov ◽  
V.G. Minogin ◽  
B.D. Pavlik
Keyword(s):  
Laser Field ◽  
Atoms And Molecules ◽  
Resonant Laser

scholarly journals Optical control of the spin of a magnetic atom in a semiconductor quantum dot

Nanophotonics ◽  
2015 ◽  
Vol 4 (1) ◽  
pp. 75-89 ◽  
Author(s):  
L. Besombes ◽  
H. Boukari ◽  
C. Le Gall ◽  
A. Brunetti ◽  
C.L. Cao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fine Structure ◽  
Solid State ◽  
Laser Field ◽  
Coherent Control ◽  
Spin Dynamics ◽  
Optical Control ◽  
Zero Magnetic Field ◽  
Magnetic Atom ◽  
Resonant Laser

Abstract:The control of single spins in solids is a key but challenging step for any spin-based solid-state quantumcomputing device. Thanks to their expected long coherence time, localized spins on magnetic atoms in a semiconductor host could be an interesting media to store quantum information in the solid state. Optical probing and control of the spin of individual or pairs of Manganese (Mn) atoms (S = 5/2) have been obtained in II-VI and IIIV semiconductor quantum dots during the last years. In this paper, we review recently developed optical control experiments of the spin of an individual Mn atoms in II-VI semiconductor self-assembled or strain-free quantum dots (QDs).We first show that the fine structure of the Mn atom and especially a strained induced magnetic anisotropy is the main parameter controlling the spin memory of the magnetic atom at zero magnetic field. We then demonstrate that the energy of any spin state of a Mn atom or pairs of Mn atom can be independently tuned by using the optical Stark effect induced by a resonant laser field. The strong coupling with the resonant laser field modifies the Mn fine structure and consequently its dynamics.We then describe the spin dynamics of a Mn atom under this strong resonant optical excitation. In addition to standard optical pumping expected for a resonant excitation, we show that the Mn spin population can be trapped in the state which is resonantly excited. This effect is modeled considering the coherent spin dynamics of the coupled electronic and nuclear spin of the Mn atom optically dressed by a resonant laser field. Finally, we discuss the spin dynamics of a Mn atom in strain-free QDs and show that these structures should permit a fast optical coherent control of an individual Mn spin.

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