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arXiv math-ph/0511069math-phmath.MP
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Bogoliubov哈密顿量与Bogoliubov变换的单参数群

Bogoliubov Hamiltonians and one parameter groups of Bogoliubov transformations

L. Bruneau, J. Derezinski

摘要:

在玻色Fock空间上,考虑一类对应于辛映射的强连续单参数群R(t)的Bogoliubov变换.在此群的生成元A上的适当假设下,保证CCR的导出表示对于所有时间t都是酉等价的,已知实现此变换的酉算子U_{nat}(t)给出R(t)的射影酉表示。在对生成元A作相当一般的假设下,证明了相应的Bogoliubov变换可以由一个单参数酉算子群U(t)实现. U(t)的生成元称为Bogoliubov哈密顿量。我们将介绍两种Bogoliubov哈密顿量(I型和II型),并给出条件,使它们被很好地定义。

英文摘要:

On the bosonic Fock space, a family of Bogoliubov transformations corresponding to a strongly continuous one-parameter group of symplectic maps R(t) is considered. Under suitable assumptions on the generator A of this group, which guarantee that the induced representations of CCR are unitarily equivalent for all time t, it is known that the unitary operator U_{nat}(t) which implement this transformation gives a prjective unitary representation of R(t). Under rather general assumptions on the generator A, we prove that the corresponding Bogoliubov transformations can be implemented by a one-parameter group U(t) of unitary operators. The generator of U(t) will be called a Bogoliubov Hamiltonian. We will introduce two kinds of Bogoliubov Hamiltonians (type I and II) and give conditions so that they are well defined.

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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