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arXiv 2105.04545quant-phgr-qcphysics.hist-ph
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从量子复杂性看宏观实在

Macroscopic Reality from Quantum Complexity

Don Weingarten

摘要:

从量子力学的埃弗雷特-德威特多世界解释开始,人们提出了一系列关于量子系统的态矢量如何在任何时刻分裂成正交分支的建议,每个分支都表现出近似经典的行为。在这里,我们提出了一个分解的状态向量到分支,通过找到最小的测量的分支的分支的均方量子复杂性。在这个提议的非相对论表述中,分支随着时间的推移反复发生,每个分支依次分裂成更多的子分支,其中现实世界跟随的分支是根据玻恩规则随机选择的。在洛伦兹协变的版本中,真实世界是从渐近晚时间的分支集合中随机抽取的一次,通过顺序地追溯晚时间选择所暗示的分支事件集合来恢复到有限时间。复杂性度量取决于具有体积单位的参数$b$,其设置量子行为与经典行为之间的边界。原则上,$b$的值可通过实验获得。

英文摘要:

Beginning with the Everett-DeWitt many-worlds interpretation of quantum mechanics, there have been a series of proposals for how the state vector of a quantum system might split at any instant into orthogonal branches, each of which exhibits approximately classical behavior. Here we propose a decomposition of a state vector into branches by finding the minimum of a measure of the mean squared quantum complexity of the branches in the branch decomposition. In a non-relativistic formulation of this proposal, branching occurs repeatedly over time, with each branch splitting successively into further sub-branches among which the branch followed by the real world is chosen randomly according to the Born rule. In a Lorentz covariant version, the real world is a single random draw from the set of branches at asymptotically late time, restored to finite time by sequentially retracing the set of branching events implied by the late time choice. The complexity measure depends on a parameter $b$ with units of volume which sets the boundary between quantum and classical behavior. The value of $b$ is, in principle, accessible to experiment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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