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Paper detail

PT-symmetric quantum graphs

We consider branched quantum wires, whose connection rules provide PT-symmetry for the Schrodinger equation on graph. For such PT-symmetric quantum graph we derive general boundary conditions which keep the Hamiltonian as PT-symmetric with real eigenvalues and positively defined norm. Explicit boundary conditions which are consistent with the general PT-symmetric boundary conditions are presented. Secular equations for finding the eigenvalues of the quantum graph are derived. Breaking of the Kirchhoff rule at the branching point is shown. Experimental realization of PT-symmetric quantum graphs on branched optical waveguides is discussed.

preprint2018arXivOpen access
D. U. MatrasulovK. K. SabirovJ. R. Yusupov
cond-mat.mes-hallcond-mat.othermath-phmath.MPquant-ph
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D. U. MatrasulovK. K. SabirovJ. R. Yusupov

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