INVESTIGADORES
GARCIA Javier
artículos
Título:
PT-symmetric strings
Autor/es:
PAOLO AMORE; FRANCISCO M FERNÁNDEZ; JAVIER GARCIA; GERMÁN GUTIERREZ
Revista:
ANNALS OF PHYSICS (NEW YORK)
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: New York; Año: 2014 vol. 343 p. 61 - 71
ISSN:
0003-4916
Resumen:
We study both analytically and numerically the spectrum of
inhomogeneous strings with PT-symmetric density. We discuss an exactly solvable model of
PT-symmetric string which is isospectral to the uniform string; for more general strings, we calculate exactly the sum rules, and find explicit expressions which can be used to obtain bounds on the lowest eigenvalue. A detailed numerical calculation is carried out for two non-solvable models depending
on a parameter, obtaining precise estimates of the critical values wherepair of real eigenvalues become complex.
