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- W3029386081 abstract "We study the question of how to decompose Hilbert space into a preferred tensor-product factorization without any preexisting structure other than a Hamiltonian operator, in particular the case of a bipartite decomposition into ``system'' and ``environment.'' Such a decomposition can be defined by looking for subsystems that exhibit quasiclassical behavior. The correct decomposition is one in which pointer states of the system are relatively robust against environmental monitoring (their entanglement with the environment does not continually and dramatically increase) and remain localized around approximately classical trajectories. We present an in-principle algorithm for finding such a decomposition by minimizing a combination of entanglement growth and internal spreading of the system. Both of these properties are related to locality in different ways. This formalism is relevant to questions in the foundations of quantum mechanics and the emergence of spacetime from quantum entanglement." @default.
- W3029386081 created "2020-06-05" @default.
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- W3029386081 date "2021-02-16" @default.
- W3029386081 modified "2023-10-02" @default.
- W3029386081 title "Quantum mereology: Factorizing Hilbert space into subsystems with quasiclassical dynamics" @default.
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- W3029386081 doi "https://doi.org/10.1103/physreva.103.022213" @default.
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