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arXiv 1708.00271gr-qchep-thmath-phmath.MP
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具有Robin边界条件的BTZ时空中大质量标量场的基态

Ground state for a massive scalar field in BTZ spacetime with Robin boundary conditions

Francesco Bussola, Claudio Dappiaggi, Hugo R. C. Ferreira, Igor Khavkine

摘要:

我们考虑BTZ时空中的一个实质量标量场,一个具有负宇宙学常数的爱因斯坦场方程的2+1维黑洞解。首先,我们分析了模式分解中的经典解的空间,并描述了可以在无穷远处施加的Robin型的所有容许边界条件的集合。其次,我们通过显式构造基态的两点函数,研究了在给定的边界条件下是否存在基态。我们证明,对于一个子类的边界条件,它是可能的,以构建一个基态,局部满足阿达玛属性。在所有其他情况下,我们表明,束缚态模式的解决方案存在,因此,这样的建设是不可能的。

英文摘要:

We consider a real, massive scalar field in BTZ spacetime, a 2+1-dimensional black hole solution of the Einstein's field equations with a negative cosmological constant. First, we analyze the space of classical solutions in a mode decomposition and we characterize the collection of all admissible boundary conditions of Robin type which can be imposed at infinity. Secondly, we investigate whether, for a given boundary condition, there exists a ground state by constructing explicitly its two-point function. We demonstrate that for a subclass of the boundary conditions it is possible to construct a ground state that locally satisfies the Hadamard property. In all other cases, we show that bound state mode solutions exist and, therefore, such construction is not possible.

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