论文标题
分支状态作为量子宇宙的新兴结构
Branching States as The Emergent Structure of a Quantum Universe
论文作者
论文摘要
量子达尔文主义建立在腐蚀理论的基础上，以解释从根本上量子宇宙中经典行为的出现。在此框架内，我们证明了关于经典现象学的出现的两个关键见解，以量子不和谐为中心，作为相关量子的量度。首先，我们表明，系统和环境的关节状态的所谓分支结构是唯一与零不一致兼容的分支结构。其次，我们证明，对于小但非零的不一致，良好但不是完美的破坏，全球纯状态的结构必须任意接近分支形式，每个分支都表现出低纠缠。我们的结果显着改善了以前的界限，并加强了现有的证据，即这种类别的分支状态是唯一与经典现象学的出现兼容的证据，如量子达尔文主义所描述的那样。
Quantum Darwinism builds on decoherence theory to explain the emergence of classical behavior in a fundamentally quantum universe. Within this framework we prove two crucial insights about the emergence of classical phenomenology, centered around quantum discord as the measure of quantumness of correlations. First, we show that the so-called branching structure of the joint state of the system and environment is the only one compatible with zero discord. Second, we prove that for small but nonzero discord and for good but not perfect decoherence, the structure of the globally pure state must be arbitrarily close to the branching form, with each branch exhibiting low entanglement. Our results significantly improve on previous bounds and reinforce the existing evidence that this class of branching states is the only one compatible with the emergence of classical phenomenology, as described by Quantum Darwinism.
