论文标题
跨斜型激发对偶极冷凝物黑洞辐射的影响
Impact of trans-Planckian excitations on black-hole radiation in dipolar condensates
论文作者
论文摘要
我们考虑在模拟黑洞设置中使用的准二极偶极冷凝物。结果表明，在冷凝水分散关系中，旋转最小值的存在留在鹰辐射谱上。特别是，取决于激发光谱中的旋转最小值，发射的辐射可以更强烈或抑制。此外，我们发现即使去除地平线，也会发生自发的粒子创造。我们的结果表明，偶极冷凝物为在地平线交织面的存在下从量子真空中模拟粒子产生的二极化环境比其接触交流对应物。
We consider a quasi-one-dimensional dipolar condensate in an analogue black hole setup. It is shown that the existence of a roton minimum in the condensate dispersion relation leaves deep imprints onto the Hawking radiation spectrum. In particular, the emitted radiation can be either more intense or suppressed, depending on the depth of the roton minimum in the excitation spectrum. In addition, we find that spontaneous particle creation occurs even when the horizon is removed. Our results establish that dipolar condensates offer a richer and more versatile environment for the simulation of particle production from the quantum vacuum in the presence of horizon-interfaces than their contact-interaction counterparts.
