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arXiv 1009.5293quant-phmath-phmath.MP
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非厄米SU(2)哈密顿量的超对称延拓与超相干态

Supersymmetric Extension of Non-Hermitian su(2) Hamiltonian and Supercoherent States

Omar Cherbal, Mahrez Drir, Mustapha Maamache, Dimitar A. Trifonov

摘要:

分析了一类新的具有实谱的非厄米哈密顿算子,它们被表示为su(2)生成元的实线性组合,其形式为$ H=ωJ_{3}+αJ_{-}+βJ_{+}$,$α\neq β$.建立了允许过渡到等效厄米哈密顿量的度量。一个伪厄米超对称扩展这样的哈密顿。它们对应于玻色子-费米子振子的伪厄米超对称系统。我们通过伪幺正超对称位移算符方法将超相干态的形式推广到这样的超对称系统。所构造的超相干态族由两个对偶子族组成,它们在玻色子-费米子Fock空间中构成一个双超完备双正规系统。每个子族的状态是玻色子湮灭算符和两个费米子降低算符之一的本征向量。

英文摘要:

A new class of non-Hermitian Hamiltonians with real spectrum, which are written as a real linear combination of su(2) generators in the form $ H=ωJ_{3}+αJ_{-}+βJ_{+}$, $α\neq β$, is analyzed. The metrics which allows the transition to the equivalent Hermitian Hamiltonian is established. A pseudo-Hermitian supersymmetic extension of such Hamiltonians is performed. They correspond to the pseudo-Hermitian supersymmetric systems of the boson-phermion oscillators. We extend the supercoherent states formalism to such supersymmetic systems via the pseudo-unitary supersymmetric displacement operator method. The constructed family of these supercoherent states consists of two dual subfamilies that form a bi-overcomplete and bi-normal system in the boson-phermion Fock space. The states of each subfamily are eigenvectors of the boson annihilation operator and of one of the two phermion lowering operators.

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