考虑洛仑兹对称性的无约束量子引力唯象学
Unambiguous Quantum Gravity Phenomenology Respecting Lorentz Symmetry
摘要：
我们描述了一个改进的版本，以前的建议探索量子引力现象学。与原方案不同的是，这里提出的一个是免费的符号模糊性，而它与前一个共享的基本特征。它关注的是可以被认为是由量子时空的基本粒度引起的效应。我们考虑的方案与最简单的方案形成鲜明对比，因为这种粒度被假设为尊重洛伦兹不变性，但它仍然是未指定的。该建议是完全观察者协变的，它涉及到非平凡的耦合曲率的物质领域，并导致一个定义良好的现象学。我们提出了有效的哈密顿量，可用于分析具体的实验情况，我们很快审查的程度，这一建议是符合背后的等效原理的基本思想。
英文摘要：
We describe a refined version of a previous proposal for the exploration of quantum gravity phenomenology. Unlike the original scheme, the one presented here is free from sign ambiguities while it shares with the previous one the essential features. It focuses on effects that could be thought as arising from a fundamental granularity of quantum space-time. The sort of schemes we consider are in sharp contrast with the simplest scenarios in that such granularity is assumed to respect Lorentz Invariance but it remains otherwise unspecified. The proposal is fully observer covariant, it involves non-trivial couplings of curvature to matter fields and leads to a well defined phenomenology. We present the effective Hamiltonian which could be used to analyze concrete experimental situations, and we shortly review the degree to which this proposal is in line with the fundamental ideas behind the equivalence principle.
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