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arXiv 1009.3236hep-thmath-phmath.MPquant-ph
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从Heisenberg代数到E2代数的PT对称性推广

Extending PT symmetry from Heisenberg algebra to E2 algebra

Carl M. Bender, R. J. Kalveks

摘要:

E2代数有三个元素J,u和v,它们满足交换关系[u,J]=iv,[v,J]=-iu,[u,v]=0。我们可以从这些元素构造哈密顿量H=J^2+gu,其中g是实参数。这个哈密顿量是厄米算符,因此它有实本征值。然而,我们也可以构造PT对称的非厄米哈密顿量H=J^2+igu,其中g也是实数。在由海森堡代数的元素x和p构造的PT对称哈密顿量的情况下,这个PT对称哈密顿量在参数空间中有两个区域,一个是所有本征值都是实数的未破PT对称区域,另一个是一些本征值是复数的破PT对称区域。这两个区域由临界值g分隔开。

英文摘要:

The E2 algebra has three elements, J, u, and v, which satisfy the commutation relations [u,J]=iv, [v,J]=-iu, [u,v]=0. We can construct the Hamiltonian H=J^2+gu, where g is a real parameter, from these elements. This Hamiltonian is Hermitian and consequently it has real eigenvalues. However, we can also construct the PT-symmetric and non-Hermitian Hamiltonian H=J^2+igu, where again g is real. As in the case of PT-symmetric Hamiltonians constructed from the elements x and p of the Heisenberg algebra, there are two regions in parameter space for this PT-symmetric Hamiltonian, a region of unbroken PT symmetry in which all the eigenvalues are real and a region of broken PT symmetry in which some of the eigenvalues are complex. The two regions are separated by a critical value of g.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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