论文标题
在存在原子损失的情况下，模拟鹰辐射的密度相关性
Density correlations from analogue Hawking radiation in the presence of atom losses
论文作者
论文摘要
现在可以在包含声学黑洞的Bose-Einstein冷凝物中重新创建鹰辐射的声音类似物。在这些实验中，信号强度和模拟鹰温度升高的浓缩凝结物的升高，但是，这也遭受了无弹性碰撞的原子损失的增加。为了确定它们如何影响模拟鹰辐射，我们在存在原子损失的情况下数值模拟了后者在Bose-Einstein冷凝物中的创建。特别是，我们探讨了到目前为止对辐射进行分析的密度密度相关性的修改。我们发现损失增加了相关信号的对比度，我们将其归因于加热，进而导致刺激辐射的组成部分，除了自发的辐射。另一个间接的结果是对白洞不稳定性模式的修改。
The sonic analogue of Hawking radiation can now be experimentally recreated in Bose-Einstein Condensates that contain an acoustic black hole. In these experiments the signal strength and analogue Hawking temperature increase for denser condensates, which however also suffer increased atom losses from inelastic collisions. To determine how these affect analogue Hawking radiation, we numerically simulate creation of the latter in a Bose-Einstein Condensate in the presence of atomic losses. In particular we explore modifications of density-density correlations through which the radiation has been analyzed so far. We find that losses increase the contrast of the correlation signal, which we attribute to heating that in turn leads to a component of stimulated radiation in addition to the spontaneous one. Another indirect consequence is the modification of the white hole instability pattern.
