论文标题
量子多体系统的客观性的出现
Emergence of Objectivity for Quantum Many-Body Systems
论文作者
论文摘要
我们研究了量子多体系统在没有环境的环境中的量子多体系统的出现，可以消除系统的状态，但是观察者只能访问整个系统的小片段。我们将Reidel（2017）的结果扩展到系统处于混合状态，测量结果，通过POVM进行测量，并且结果的烙印是不完善的。我们引入了有关状态和测量结果的新条件，以恢复任何数量的观察者的完整经典性。我们进一步表明，每当相应的测量结果冗余时，量子多体系统的演变可以产生满足此条件的状态。
We examine the emergence of objectivity for quantum many-body systems in a setting without an environment to decohere the system's state, but where observers can only access small fragments of the whole system. We extend the result of Reidel (2017) to the case where the system is in a mixed state, measurements are performed through POVMs, and imprints of the outcomes are imperfect. We introduce a new condition on states and measurements to recover full classicality for any number of observers. We further show that evolutions of quantum many-body systems can be expected to yield states that satisfy this condition whenever the corresponding measurement outcomes are redundant.
