NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2018, 9 (4), P. 457–463
Wave dynamics on timedepending graph with Aharonov–Bohm ring
D. A. Eremin – Department of Mathematics and IT, Ogarev Mordovia State University, Bolshevistskaya Str. 68, Saransk, Russia; ereminda@mail.ru
E. N. Grishanov – Department of Mathematics and IT, Ogarev Mordovia State University, Bolshevistskaya Str. 68, Saransk, Russia; evgenyg@mail.ru
D. S. Nikiforov – Department of Higher Mathematics, ITMO University, Kroverkskiy pr. 49, St. Petersburg, 197101, Russia; dmitrii.nikiforov@gmail.com
I. Y. Popov – Department of Higher Mathematics, ITMO University, Kroverkskiy pr. 49, St. Petersburg, 197101, Russia; popov1955@gmail.com
Aharonov–Bohm ring (AB ring) is an element frequently used in nanosystems. The paper deals with wave dynamics on quantum graph consisting of AB ring coupled to a segment. It is assumed that the lengths of the edges vary in time. Variable replacement is made to come to the problem for stationary geometric graph. The obtained equation is solved using the expansion with respect to a complete system of eigenfunctions of the unperturbed self-adjoint operator for the stationary graph. The coefficients of the expansion are found as solutions of a system of differential equations numerically. The influence of the magnetic field is studied. The comparison with the case of stable geometric graph is made.
Keywords: quantum graph, Aharonov–Bohm ring.
PACS 03.65.w, 02.30.Tb, 02.10.Db, 73.63.Nm
DOI 10.17586/2220-8054-2018-9-4-457-463
