标题： 如果量子引力仅仅是“单纯的”量子信息理论会怎样？ 显示英文标题

标题： What if Quantum Gravity is "just'' Quantum Information Theory?

摘要： 我建议全息量子引力在某种意义上等价于量子信息理论。 这将带来一些激进的含义。 首先，量子引力理论不应有任何可调节的耦合常数，类似于弦理论。 因此，所有完整的量子引力体理论都是彼此对偶的。 通过建立一个适当纠缠的状态，应该可以找到连接任何两个量子引力理论（例如，弦理论和圈量子引力）的虫洞。 其次，如果我们把某一时刻的空间表示为张量网络，那么通过边界状态的规范等价描述，动力学会自动被编码进去。 这似乎意味着，与半经典预期相反，封闭宇宙应该只有一种状态。 显示英文摘要

摘要： I suggest the possibility that holographic quantum gravity is, in some sense, equivalent to quantum information theory. Some radical implications would follow. First, the theory of quantum gravity should have no adjustable coupling constants, similar to string theory. Thus, all complete bulk theories of quantum gravity are dual to each other. By setting up an appropriately entangled state, it should be possible to find wormholes connecting any two quantum gravity theories (e.g. string theory and loop quantum gravity). Secondly, if we represent space at one time as a tensor network, then dynamics is automatically encoded via gauge-equivalent descriptions of the boundary state. This would appear to imply, contrary to semiclassical expectations, that a closed universe should have only one state.