Quasibound states in the continuum in a two channel quantum wire with an adatom.
Quasibound states in the continuum in a two channel quantum wire with an adatom.
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DOI：
10.1103/physrevlett.99.210404
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发表时间：
2007-11
影响因子：
8.6
通讯作者：
H. Nakamura;N. Hatano;S. Garmon;T. Petrosky
中科院分区：
文献类型：
--
作者：
H. Nakamura;N. Hatano;S. Garmon;T. Petrosky
我们报告的预测quasibound状态（共振态具有很长的寿命）发生在本征值连续的传播状态的某些系统中，连续由两个重叠的能带形成。我们说明了这种效果，使用量子线系统与两个通道和一个附加的吸附原子。当两个沟道的能带重叠时，位于上能带正下方的可能的束缚态被下能带稍微破坏，从而变成具有非常长寿命的共振态（第二个这样的状态位于下能带上方）。与冯·诺依曼和维格纳预言的连续介质中的束缚态不同，这些态在参数空间的宽区域内出现。
We report the prediction of quasibound states (resonant states with very long lifetimes) that occur in the eigenvalue continuum of propagating states for certain systems in which the continuum is formed by two overlapping energy bands. We illustrate this effect using a quantum wire system with two channels and an attached adatom. When the energy bands of the two channels overlap, a would-be bound state that lays just below the upper energy band is slightly destabilized by the lower energy band and thereby becomes a resonant state with a very long lifetime (a second such state lays above the lower energy band). Unlike the bound states in continuum predicted by von Neumann and Wigner, these states occur for a wide region of parameter space.