Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Bogdan Borca"'
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 36:R49-R124
The quasistationary quasienergy state approach (QQES) is applied to the analysis of partial (n-photon) decay rates and angular distributions (ADs) of photoelectrons produced by an elliptically polarized laser field. The problem is formulated for a we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91071f4ef7a3b2b12da8866201f000c5
https://doi.org/10.1088/0953-4075/36/9/201
https://doi.org/10.1088/0953-4075/36/9/201
Static-electric-field behaviour in negative ion detachment by an intense, high-frequency laser field
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 34:L579-L586
Based upon the exact numerical solution of the complex quasienergy problem for a 3-dimensional short-range potential as well as upon analytical evaluations, we demonstrate for any finite frequency ω that the action of an ultra-intense laser field (w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::616df94f828250d5beca4596d5a97524
https://doi.org/10.1088/0953-4075/34/17/105
https://doi.org/10.1088/0953-4075/34/17/105
Publikováno v:
Journal of Experimental and Theoretical Physics Letters. 72:294-297
The formalism of complex quasienergies is used for exact calculation of the field-dependent decay rate for a weakly bound particle (in the model of a three-dimensional zero-range potential) in a strong monochromatic laser field. It is shown that the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c681968a9fa18ee739122dff6f2f5421
https://doi.org/10.1134/1.1328440
https://doi.org/10.1134/1.1328440
Autor:
Bogdan Borca, K LaGattuta
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 31:4781-4789
A new calculation was performed of the dielectronic recombination rate coefficient for the ion, in cases for which static magnetic and electric fields are applied simultaneously in the collision region. The intermediate-state Hamiltonian was diagonal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb9f40ea00f73a5b542c535b3db315e9
https://doi.org/10.1088/0953-4075/31/21/010
https://doi.org/10.1088/0953-4075/31/21/010
Publikováno v:
Physical Review A. 71
Spectroscopic studies of few-body systems at ultracold temperatures provide valuable information that often cannot be extracted in a hot environment. Considering a pair of atoms, we propose a cooling mechanism that makes use of a scattering Feshbach
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6263707f8edb55a2143d25cedc6ced20
https://doi.org/10.1103/physreva.71.033402
https://doi.org/10.1103/physreva.71.033402
A simple two-atom model is shown to describe a Bose-Einstein condensate of alkali atoms subjected to external magnetic field ramps near a Feshbach resonance. The implications uncovered for two atoms in a trap can be applied at least approximately to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4564f2da0190016342e22752b75c4237
Publikováno v:
Physical review letters. 91(7)
Using three-body recombination as the underlying process, we propose a method of coherently driving an atomic Bose-Einstein condensate (BEC) into a molecular BEC. Superradiant-like stimulation favors atom-to-molecule transitions when two atomic BECs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee005e66aa5fba096f65413ccde85be7
https://pubmed.ncbi.nlm.nih.gov/12934999
https://pubmed.ncbi.nlm.nih.gov/12934999
Publikováno v:
Physical Review A. 65
We present exact ab initio quantum results for harmonic generation ~HG! by a weakly bound electron interacting with a strong monochromatic laser field. The analytic structure of the HG amplitude resulting from the multiphoton detachment thresholds is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2012adf6768075add99a4edcaea5cdbd
https://doi.org/10.1103/physreva.65.051402
https://doi.org/10.1103/physreva.65.051402
Publikováno v:
Physical Review Letters. 88
We present nonperturbative theoretical results showing a resonant-like enhancement of above-threshold detachment spectra in the region of the high-energy plateau as the laser intensity sweeps across channel thresholds. This enhancement has a pure qua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9050ad13481b521dadc9923196eae7f1
https://doi.org/10.1103/physrevlett.88.193001
https://doi.org/10.1103/physrevlett.88.193001
Unusual threshold effects are found theoretically in the frequency and intensity dependence of angular distributions produced by an elliptically polarized laser as well as in the elliptic dichroism parameter, which measures the asymmetry of the angul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b4a4a940ad83095aee05f1166751407