108 citations · 1.2k across the 67 of their papers we have counts for
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quant-ph2001★ 29 cited
Classical Aspects of Quantum Walls in One Dimension
Tamas Fulop, Taksu Cheon, Izumi Tsutsui
We investigate the system of a particle moving on a half line x >= 0 under the general walls at x = 0 that are permitted quantum mechanically. These quantum walls, characterized by…
quant-ph2001
Spectral Structure of Quantum Line with a Defect
Taksu Cheon, Tamas Fulop, Izumi Tsutsui
We study the spectral properties of one-dimensional quantum wire with a single defect. We reveal the existence of the non-trivial topological structures in the spectral space of th…
quant-ph2001★ 47 cited
Moebius Structure of the Spectral Space of Schroedinger Operators with Point Interaction
Izumi Tsutsui, Tamas Fulop, Taksu Cheon
The Schroedinger operator with point interaction in one dimension has a U(2) family of self-adjoint extensions. We study the spectrum of the operator and show that (i) the spectrum…