Analogue gravitational systems are becoming an increasing popular way of studying the behaviour of quantum systems in curved spacetime. Setups based on ultracold quantum gases in particular, have been recently harnessed to explore the thermal nature of Hawking’s and Unruh’s radiation that was theoretically predicted almost 50 years ago. For solid state implementations, a promising system is graphene, in which a link between the Dirac-like low-energy electronic excitations and relativistic quantum field theories has been unveiled soon after its discovery. This link could be extended to the case of curved quantum field theory when the graphene sheet is shaped in a surface of constant negative curvature, known as Beltrami’s pseudosphere. Here we provide numerical evidence that energetically stable negative curvature graphene surfaces can be realized. Owing to large-scale simulations, our geometrical realizations are characterized by a ratio between the carbon–carbon bond length and...

中文翻译：

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通过变形的石墨烯膜探索事件视界和霍金辐射

模拟引力系统正在成为研究弯曲时空中量子系统行为的一种日益流行的方式。特别是基于超冷量子气体的装置，最近已被用于探索霍金和Unruh辐射的热性质，理论上是近50年前预测的。对于固态实现，有希望的系统是石墨烯，其中发现狄拉克式低能电子激发与相对论量子场论之间的联系已被揭示。当石墨烯片在恒定负曲率的表面（即贝尔特拉米的伪球体）中成形时，这种联系可以扩展到弯曲量子场论的情况。在这里，我们提供了数值证据，表明可以实现能量稳定的负曲率石墨烯表面。