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arXiv 0710.4879quant-phhep-thmath-phmath.MP
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QT-对称性与弱伪厄米性

QT-Symmetry and Weak Pseudo-Hermiticity

Ali Mostafazadeh

摘要:

对于作用在Hilbert空间${\cal H}$中的可逆(有界)线性算子Q,我们考虑了非厄米哈密顿量$H:{\cal H}\to{\cal H}$的QT对称性的结果,其中T是时间反演算子.如果H在${\cal T} H^\dagger {\cal T}=H$意义下对称,则QT对称等价于Q^{-1}-弱赝厄米性.但一般来说,这种等价性并不成立。我们用一些具体的例子来说明这一点。其中有一大类非PT对称的哈密顿量,它们具有PT对称哈密顿量的谱特性。

英文摘要:

For an invertible (bounded) linear operator Q acting in a Hilbert space ${\cal H}$, we consider the consequences of the QT-symmetry of a non-Hermitian Hamiltonian $H:{\cal H}\to{\cal H}$ where T is the time-reversal operator. If H is symmetric in the sense that ${\cal T} H^\dagger {\cal T}=H$, then QT-symmetry is equivalent to Q^{-1}-weak-pseudo-Hermiticity. But in general this equivalence does not hold. We show this using some specific examples. Among these is a large class of non-PT-symmetric Hamiltonians that share the spectral properties of PT-symmetric Hamiltonians.

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