Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Roberto Roncaglia"'
Autor:
George P. Tsironis, Roberto Roncaglia
Publikováno v:
Physica D: Nonlinear Phenomena. 113:318-325
We have studied the dynamical properties of the Holstein model with a nonlinear phonon Hamiltonian. Using the translational invariance of the system we eliminate from the Hamiltonian the electronic degrees of freedom. The resulting Hamiltonian descri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb7bfd461c0ebc2f4a4a4fb724dcfc69
https://doi.org/10.1016/s0167-2789(97)00284-4
https://doi.org/10.1016/s0167-2789(97)00284-4
Publikováno v:
Physical Review E. 56:2325-2328
We independently examine the case of a spin-$j$ particle interacting with a boson field studied by Finney and Gea-Banacloche. We concentrate on their conclusion that in the case $j=1/2$ the correspondence between the quantum and the semiclassical cas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5eff85f7601a40cbc92a1a6c42c07974
https://doi.org/10.1103/physreve.56.2325
https://doi.org/10.1103/physreve.56.2325
Publikováno v:
Physical Review A. 54:112-118
Article discussing research on anomalous diffusion and environment-induced quantum decoherence.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42f82a546cba37c39f669698a87bb8cf
https://doi.org/10.1103/physreva.54.112
https://doi.org/10.1103/physreva.54.112
Publikováno v:
Journal of Statistical Physics. 68:321-343
We study the Hamiltonian of a two-level system interacting with a one-mode radiation field by means of the Wigner method and without using the rotating-wave approximation. We show that a phenomenon of collapses and revival, reminiscent of that exhibi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36c3edf61622ac8ff4bd6e807a5739cf
https://doi.org/10.1007/bf01048848
https://doi.org/10.1007/bf01048848
Publikováno v:
Physical Review Letters. 67:2593-2596
We study the Hamiltonian of a two-level system interacting with a one-mode radiation field by means of the Wigner method and without using the rotating-wave approximation. We show that a phenomenon of collapses and revival, reminiscent of that exhibi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28c5747aec702a6fdfb9e8716a2723cf
https://doi.org/10.1103/physrevlett.67.2593
https://doi.org/10.1103/physrevlett.67.2593
Publikováno v:
Physical Review A. 41:6625-6634
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b848f0aa713b9b74f7b175239ac4138
https://doi.org/10.1103/physreva.41.6625
https://doi.org/10.1103/physreva.41.6625
Autor:
Patrizia Barozzi, Mario Luppi, Giuseppe Torelli, Luigi Cavanna, Giovanni Riva, Monica Morselli, D. Vallisa, Giorgio Rossi, A Re, Luisa Ravazzini, Raffaella Trovato, Roberto Roncaglia, Leonardo Potenza, Giuseppe Longo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1492b47d4c136e69688e08a99fa671b
https://hdl.handle.net/11380/3845
https://hdl.handle.net/11380/3845
Publikováno v:
Physical Review E. 64
We investigate the decay process from a time dependent potential well in the semiclassical regime. The classical dynamics is chaotic and the decay rate shows an irregular behavior as a function of the system parameters. By studying the weak-chaos reg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::857721ce5774ca95e56feb88d25f5579
https://doi.org/10.1103/physreve.64.056215
https://doi.org/10.1103/physreve.64.056215
Autor:
Maria Lucia Matteo, Andrea Gallinelli, Ivan Ciaccio, Fabio Facchinetti, Annibale Volpe, Roberto Roncaglia
Objective: To evaluate the possible correlation between immunological changes and implantation rates in patients who undergo in vitro fertilization–embryo transfer (IVF-ET). Design: Controlled clinical study. Setting: University hospital. Patient(s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a3073494dba097f3ab4d2392ba385a2
https://hdl.handle.net/11380/740786
https://hdl.handle.net/11380/740786
Publikováno v:
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics. 62(3 Pt)
We study the entropy time evolution of a quantum mechanical model, which is frequently used as a prototype for Anderson's localization. Recently Latora and Baranger [V. Latora, M. Baranger, Phys. Rev.Lett. 82, 520(1999)] found that there exist three
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08810ffd4b71feeb752c88ce300abb4d
https://pubmed.ncbi.nlm.nih.gov/11088844
https://pubmed.ncbi.nlm.nih.gov/11088844