TY - JOUR
T1 - Interplay of superradiance and disorder in the Anderson Model
AU - Celardo, G. L.
AU - Celardo, Giuseppe
AU - Biella, A.
AU - Kaplan, L.
AU - Borgonovi, Fausto
PY - 2013
Y1 - 2013
N2 - Using a non-Hermitian Hamiltonian approach to open systems, we study the interplay of disorder and super-
radiance in a one-dimensional Anderson model. Analyzing the complex eigenvalues of the non-Hermitian
Hamiltonian, a transition to a superradiant regime is shown to occur. As an effect of openness the structure
of eigenstates undergoes a strong change in the superradiant regime: we show that the sensitivity to disorder
of the superradiant and the subradiant subspaces is very different; superradiant states remain delocalized as
disorder increases, while subradiant states are sensitive to the degree of disorder.
AB - Using a non-Hermitian Hamiltonian approach to open systems, we study the interplay of disorder and super-
radiance in a one-dimensional Anderson model. Analyzing the complex eigenvalues of the non-Hermitian
Hamiltonian, a transition to a superradiant regime is shown to occur. As an effect of openness the structure
of eigenstates undergoes a strong change in the superradiant regime: we show that the sensitivity to disorder
of the superradiant and the subradiant subspaces is very different; superradiant states remain delocalized as
disorder increases, while subradiant states are sensitive to the degree of disorder.
KW - anderson localization
KW - open quantum systems
KW - anderson localization
KW - open quantum systems
UR - http://hdl.handle.net/10807/26398
U2 - 10.1002/prop.201200082
DO - 10.1002/prop.201200082
M3 - Article
SN - 0015-8208
VL - 2013
SP - 250
EP - 260
JO - Fortschritte der Physik
JF - Fortschritte der Physik
ER -