Analogue quantum gravity phenomenology from a two-component Bose–Einstein condensate
Analogue quantum gravity phenomenology from a two-component Bose–Einstein condensate
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来自二元玻色-爱因斯坦凝聚态的模拟量子引力现象学
DOI：
10.1088/0264-9381/23/9/023
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发表时间：
2005
影响因子：
3.5
通讯作者：
S. Weinfurtner
中科院分区：
文献类型：
--
作者：
S. Liberati;M. Visser;S. Weinfurtner
我们提出了一种模拟涌现的时空，它再现了量子引力现象学中最常见的 ansätze 的显着特征。我们通过研究两个耦合的玻色-爱因斯坦凝聚系统来做到这一点。该系统可以调整为具有两种“声子”模式（一种有质量，一种无质量），它们在流体动力学近似中共享相同的极限速度。然而，一旦“量子压力”变得重要，该系统就拥有（可能是非通用的）洛伦兹破坏项。我们研究了相关微调条件的物理解释，并讨论了这种模拟时空可以为真实物理量子引力现象学提供的可能的教训和提示。我们特别表明，在这种新兴时空中，准粒子的有效场论并没有表现出所谓的“自然性问题”。
We present an analogue-emergent spacetime that reproduces the salient features of the most common ansätze used for quantum gravity phenomenology. We do this by investigating a system of two-coupled Bose–Einstein condensates. This system can be tuned to have two ‘phonon’ modes (one massive, one massless) which share the same limiting speed in the hydrodynamic approximation. The system nevertheless possesses (possibly non-universal) Lorentz violating terms once ‘quantum pressure’ becomes important. We investigate the physical interpretation of the relevant fine-tuning conditions, and discuss the possible lessons and hints that this analogue spacetime could provide for the phenomenology of real physical quantum gravity. In particular we show that the effective field theory of quasi-particles in such an emergent spacetime does not exhibit the so-called ‘naturalness problem’.