Zobrazeno 1 - 10
of 122
pro vyhledávání: '"G. Cattapan"'
Autor:
G. Cattapan, P. Lotti
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 46:77-83
We study spin-polarized transport through an Aharonov–Bohm ring threaded by magnetic flux, which is serially or laterally coupled to an external waveguide. The ring contains two magnetic impurities, whose spins are coupled to the electron spin thro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e5fb0cf05d9c59b035f3601ec97be85
https://doi.org/10.1016/j.physe.2012.08.022
https://doi.org/10.1016/j.physe.2012.08.022
Spin-polarized transport through a laterally coupled Aharonov–Bohm ring with two magnetic impurities
Autor:
G. Cattapan, P. Lotti
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 44:1454-1460
We consider spin-polarized electron transport through an Aharonov-Bohm ring threaded by magnetic flux, side coupled to a quantum waveguide. The ring contains two magnetic defects symmetrically placed with respect to the stub. In the framework of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea79d2377c86964aa64556cfb2b1e14b
https://doi.org/10.1016/j.physe.2012.03.010
https://doi.org/10.1016/j.physe.2012.03.010
Autor:
P. Lotti, G. Cattapan
Publikováno v:
The European Physical Journal B. 66:517-523
We investigate the occurrence of bound states in the continuum (BIC's) in serial structures of quantum dots coupled to an external waveguide, when some characteristic length of the system is changed. By resorting to a multichannel scattering-matrix a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31f4c7217a33088a47f67c0d2e2cb44b
https://doi.org/10.1140/epjb/e2008-00449-5
https://doi.org/10.1140/epjb/e2008-00449-5
Autor:
G. Cattapan, P. Lotti
Publikováno v:
The European Physical Journal B. 60:181-185
We have studied the behavior of the S-matrix poles near threshold for quantum waveguides coupled to a cavity with a defect. We emphasize the occurrence of both dominant and shadow poles on the various sheets of the energy Riemann surface, and show th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5f7bd467b77aad3ab32fdda16bba3ab
https://doi.org/10.1140/epjb/e2007-00337-6
https://doi.org/10.1140/epjb/e2007-00337-6
Publikováno v:
The European Physical Journal B. 53:387-394
We consider a T-shaped, one-dimensional quantum waveguide containing an attractive or repulsive impurity in the lateral stub, and study how the resonance poles move in the complex k-plane when the strength or the position of the defect changes. Simil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af60d1071e3d0c5b7fdc9c8b67970251
https://doi.org/10.1140/epjb/e2006-00394-3
https://doi.org/10.1140/epjb/e2006-00394-3
Autor:
Lidia S. Ferreira, G. Cattapan
Publikováno v:
Physics Reports. 362:303-407
We review the properties of Δ, and the role it plays in Nuclear Physics. We try to assess what has been ascertained up to now, and what remains to be clarified about this hadron, which represents the outstanding structure in the medium-energy pion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cce1ecf675896f4a79de12f89583cd1
https://doi.org/10.1016/s0370-1573(01)00093-x
https://doi.org/10.1016/s0370-1573(01)00093-x
Publikováno v:
Physical Review C. 57:1588-1594
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bfab1e9bbcf9f86a62dceecfa08c22f
https://doi.org/10.1103/physrevc.57.1588
https://doi.org/10.1103/physrevc.57.1588
Autor:
P. Lotti, G. Cattapan
We study spin-dependent transport in a two-dimensional waveguide with two magnetic impurities. The waveguide may have a non-trivial boundary, and the electron is coupled to the defects through contact spin–spin interactions amended by a suitable fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27872b4772829a3afd8010553e8d4e78
http://hdl.handle.net/11577/2811326
http://hdl.handle.net/11577/2811326
Autor:
Luciano Canton, G. Cattapan
Publikováno v:
Physical Review C. 56:689-701
In this paper we review the present status of the {pi}NNN-NNN problem. In particular, we reconsider the chain-labeled approach recently proposed by us, and identify a class of graphs, previously overlooked, which prevents the kernel of the correspond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e181ca0815ebfcee557e80a34117480f
https://doi.org/10.1103/physrevc.56.689
https://doi.org/10.1103/physrevc.56.689
Publikováno v:
Canadian Journal of Physics. 74:209-225
We calculated a broad set of observables for the π+d ↔ pp reaction with a relatively simple meson-exchange isobar model. The comparison between the calculated results and experimental data (including spin observables) shows that the model gives an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32d52b053f06879906e508a2649f6840
https://doi.org/10.1139/p96-033
https://doi.org/10.1139/p96-033