Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Ph Durand"'
Publikováno v:
IAENG Transactions on Engineering Sciences.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3dc0ec4b7a1e13c08c2a1366e1e1bd9c
https://doi.org/10.1142/9789813226203_0001
https://doi.org/10.1142/9789813226203_0001
Publikováno v:
International Journal of Quantum Chemistry. 16:283-291
The application of a model potential technique for calculating band structures of polymers is described. In this approach, the valence Hamiltonian is a sum of a kinetic term and of various effective atomic potentials chosen in a nonlocal form of Gaus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2565c8b3b58c86bd9d68745bbfe9d422
https://doi.org/10.1002/qua.560160829
https://doi.org/10.1002/qua.560160829
Autor:
Ph. Durand, Ivana Paidarová
Publikováno v:
The European Physical Journal D - Atomic, Molecular and Optical Physics. 26:253-259
We present a study of the ionization of the hydrogen atom by weak and strong static electric fields from the ground state and from some excited states. The under- and above-ionization barrier dynamical regimes are accurately computed for short and lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e930f386aff10cb3b57115a0cdfa8321
https://doi.org/10.1140/epjd/e2003-00271-9
https://doi.org/10.1140/epjd/e2003-00271-9
Autor:
Ph. Durand, Ivana Paidarová
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 35:469-481
Standard Fano profiles can be described in terms of two interacting quasi-bound states. The theory of Fano profiles is extended to line profiles implying several interfering quasi-bound states. New analytical expressions of the lineshapes are derived
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ca3011a3277bdd804b807b10b98fad3
https://doi.org/10.1088/0953-4075/35/3/302
https://doi.org/10.1088/0953-4075/35/3/302
Autor:
Ph. Durand, Florent Xavier Gadea, Pablo Villarreal, Gerardo Delgado-Barrio, Tomás González-Lezana
Publikováno v:
The European Physical Journal D. 15:215-219
The wave operator theory of quantum dynamics is applied to characterize coupled metastable states. The theory extends to quasi bound states methods which are standard for dealing with bound levels. It is shown that interacting resonances can be inves
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7390783ae5e7013bfda3a697e4a0d89e
https://doi.org/10.1007/s100530170168
https://doi.org/10.1007/s100530170168
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 34:1953-1966
The theory of Fano profiles currently presented in the framework of scattering theory can also be investigated from model Hamiltonians projected in the basis of discrete states. It is shown that the wave operator approach of quantum dynamics applied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8973fa7375ad558d63126633cb935bbc
https://doi.org/10.1088/0953-4075/34/10/310
https://doi.org/10.1088/0953-4075/34/10/310
Publikováno v:
Chemical Physics Letters. 291:517-522
Complex absorbing potentials represent a powerful tool for the investigation of quantum resonances. However, they have to be carefully chosen for each physical situation. The purpose of this Letter is to show that non-optimized complex potentials can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf77e08b7783ea2c8137f795b559218d
https://doi.org/10.1016/s0009-2614(98)00627-7
https://doi.org/10.1016/s0009-2614(98)00627-7
Autor:
Ph. Durand, Ivana Paidarová
Publikováno v:
Physics Letters A. 232:362-366
We present new results concerning the theoretical treatment of quantum resonances based on the use of optical potentials and perturbation theory. A new criterion is presented for selecting an optical potential. As a result, a wide class of optical po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a113d1f462eefe60c8fa9b5f14e25ba6
https://doi.org/10.1016/s0375-9601(97)00440-4
https://doi.org/10.1016/s0375-9601(97)00440-4
Publikováno v:
Acta Physica Polonica A. 91:1061-1068
Perturbation methods are generally used for solving wave operator equations associated with the determination of effective Hamiltonians. In many cases the standard Rayleigh—Schrodinger and Brillouin—Wigner series either converge slowly or diverge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b599dd03e0536942d5190a2ead34e91
https://doi.org/10.12693/aphyspola.91.1061
https://doi.org/10.12693/aphyspola.91.1061
Autor:
Ph Durand, Ivana Paidarová
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 2013, 46 (7), pp.075001 (6P.). ⟨10.1088/0953-4075/46/7/075001⟩
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 2013, 46 (7), pp.075001 (6P.). ⟨10.1088/0953-4075/46/7/075001⟩
International audience; The dynamics of quantum resonances, their energies and their widths, are investigated by means of time-dependent unitary and non-unitary transformations of the Hamiltonian. The aim of the change of representation of the Schrö
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7aaa2746147b6d9d5fbc4a1454929ab6
https://hal.archives-ouvertes.fr/hal-00880131
https://hal.archives-ouvertes.fr/hal-00880131
