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.

Celardo, G., Biella, A., Kaplan, L., Borgonovi, F., Interplay of superradiance and disorder in the Anderson Model, <<FORTSCHRITTE DER PHYSIK>>, 2013; 2013 (61): 250-260. [doi:10.1002/prop.201200082] [http://hdl.handle.net/10807/26398]

Interplay of superradiance and disorder in the Anderson Model

Celardo, Giuseppe;Borgonovi, Fausto
2013

Abstract

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.
Inglese
Celardo, G., Biella, A., Kaplan, L., Borgonovi, F., Interplay of superradiance and disorder in the Anderson Model, <<FORTSCHRITTE DER PHYSIK>>, 2013; 2013 (61): 250-260. [doi:10.1002/prop.201200082] [http://hdl.handle.net/10807/26398]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10807/26398
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