论文标题
结构的量子起源的平面类似物
A Flat Space Analogue for the Quantum Origin of Structure
论文作者
论文摘要
最近已提出了通货膨胀宇宙学中非高斯相关因子的分析结构作为对宇宙结构的量子起源的检验。为了进一步理解这一建议，我们探索了平坦空间中类似的同等相关器，并表明它们具有与宇宙学对应物相同的特征。量子真空通过具有总能极的内在相关器唯一地识别，并且在物理动量上没有其他极点。我们将这种行为直接与S-Matrix联系起来，并表明物理动量处的极点始终是由于初始状态中存在的颗粒的散射而产生的。我们将这些固定空间与中的相关器与令人兴奋的多个Inruh-de Witt检测器的概率振幅联系起来。通过不确定性原理将探测器定位在时空中，提供了激发真空所需的能量和动力，并解释了与宇宙颗粒产生的联系。此外，这些探测器的纠缠提供了探测基础场的纠缠状态，并将相关因子的性质连接到检测器的纠缠范围。
The analytic structure of non-Gaussian correlators in inflationary cosmologies has recently been proposed as a test of the quantum origin of structure in the universe. To further understand this proposal, we explore the analogous equal-time in-in correlators in flat space and show they exhibit the same features as their cosmological counterparts. The quantum vacuum is uniquely identified by in-in correlators with a total energy pole and no additional poles at physical momenta. We tie this behavior directly to the S-matrix and show that poles at physical momenta always arise from scattering of particles present in the initial state. We relate these flat-space in-in correlators to the probability amplitude for exciting multiple Unruh-de Witt detectors. Localizing the detectors in spacetime, through the uncertainty principle, provides the energy and momentum needed to excite the vacuum and explains the connection to cosmological particle production. In addition, the entanglement of these detectors provides a probe of the entangled state of the underlying field and connects the properties of the correlators to the range of entanglement of the detectors.
