Zobrazeno 1 - 10
of 38
pro vyhledávání: '"M I Molina"'
Autor:
U Naether, S Stützer, R A Vicencio, M I Molina, A Tünnermann, S Nolte, T Kottos, D N Christodoulides, A Szameit
Publikováno v:
New Journal of Physics, Vol 15, Iss 1, p 013045 (2013)
We experimentally observe anomalous wavepacket evolution in a realization of a one-dimensional finite binary Anderson model in the presence of short-range correlations. To this end, we employ weakly-coupled optical waveguides with propagation constan
Externí odkaz:
https://doaj.org/article/e990314513d44ae78b14cfa28c5a3ad4
Publikováno v:
AMERICAN JOURNAL OF PHYSICS
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
We examine the transmission coefficient of plane waves across two nonlinear delta-function barriers with positive opacity. It is shown that this simple system is capable of bistable behavior at sufficiently large input intensities. The bistable behav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b2c10469e5431d7eb4e26ec94b9fc46
https://doi.org/10.1119/1.2785191
https://doi.org/10.1119/1.2785191
Autor:
C. A. Bustamante, M. I. Molina
Publikováno v:
International Journal of Modern Physics B. 17:2281-2298
We examine numerically the long-time average probability in a two-site system, for finding an electron staying at an initially occupied site for an asymmetric quantum Holstein electron-phonon coupled model. The principal finding is the existence of q
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4927409b644ec357e76a42873f0d3e9
https://doi.org/10.1142/s0217979203018144
https://doi.org/10.1142/s0217979203018144
Autor:
M. I. Molina, C. A. Bustamante
Publikováno v:
AMERICAN JOURNAL OF PHYSICS
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
We solve the continuous one-dimensional Schr\"{o}dinger equation for the case of an inverted {\em nonlinear} delta-function potential located at the origin, obtaining the bound state in closed form as a function of the nonlinear exponent. The bound s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ccd87bd527dde00757fa1b78776e992
https://doi.org/10.1119/1.1417529
https://doi.org/10.1119/1.1417529
Autor:
M. I. Molina
Publikováno v:
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
We discuss the all-important issue of nonlinearity in the physical sciences, with emphasis on its importance in condensed matter physics, where nonlinearity provides a natural mechanism for selective trapping of excitations, such as electrons, at a m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5772bd63397742154e794652417e8ae9
https://doi.org/10.1142/s0217979201005660
https://doi.org/10.1142/s0217979201005660
Autor:
M. I. Molina
Publikováno v:
Physical Review B. 58:12547-12550
We study the propagation of electrons ~or excitations! through a one-dimensional tight-binding chain in the simultaneous presence of nonlinearity and diagonal disorder. The evolution of the system is given by a disordered version of the discrete nonl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3202ae27129a5926238c3b4243983b6c
https://doi.org/10.1103/physrevb.58.12547
https://doi.org/10.1103/physrevb.58.12547
Autor:
M. I. Molina
Publikováno v:
SPIE Proceedings.
We consider a simplified model for a nonlinear magnetic metamaterial, consisting of a split-ring resonator (SRR) array capable of nonlinear capacitive response. We compute the localized modes around simple magnetoinductive impurities located at the b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac54162f617083d6eae5eca72868a3e2
https://doi.org/10.1117/12.927775
https://doi.org/10.1117/12.927775
Autor:
M. I. Molina
Publikováno v:
Progress in Optical Science and Photonics ISBN: 9783642212062
We consider a simplified model of a nonlinear magnetic metamaterial, consisting of a weakly-coupled, periodic split-ring resonator (SRR) array capable of nonlinear capacitive response. We analyze three related problems: (a) The calculation of localiz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fa998adc4c5c33e9d3c95efce48259d
https://doi.org/10.1007/10091_2012_15
https://doi.org/10.1007/10091_2012_15
Publikováno v:
Journal of Physics: Condensed Matter. 6:7741-7749
We study the transmission problem for electrons in an alternately linear-non-linear medium using a quasiperiodic Kronig-Penney model whose variance in spatial locations obeys the Fibonacci rules. We find that for waves with low intensity and long wav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c6114441f367b935fb6e3f48bb1fe1b
https://doi.org/10.1088/0953-8984/6/38/012
https://doi.org/10.1088/0953-8984/6/38/012
Publikováno v:
Physical Review E. 50:2365-2368
We study the problem of one nonlinear impurity embedded in a linear tight-binding host. The impurity is of the type found in the generalized discrete nonlinear Schr\"odinger equation. We obtain analytically a phase diagram that describes the presence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76800506d3c93621dbd46a556730b2d3
https://doi.org/10.1103/physreve.50.2365
https://doi.org/10.1103/physreve.50.2365