Related papers: An inside view of the tensor product

An inside view of the tensor product

URL: http://arxiv.org/abs/2303.14596v1
Date: Sun, 26 Mar 2023 00:39:36 GMT
Title: An inside view of the tensor product
Authors: Rafael D. Sorkin
Abstract summary: We reconstruct $A$ and $B$ from the family of simple tensors $aotimesb$ within $V$. In an application to quantum mechanics, one would be reconstructing the component subsystems of a composite system from its unentangled pure states.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Given a vector-space $~V~$ which is the tensor product of vector-spaces $A$ and $B$, we reconstruct $A$ and $B$ from the family of simple tensors $a{\otimes}b$ within $V$. In an application to quantum mechanics, one would be reconstructing the component subsystems of a composite system from its unentangled pure states. Our constructions can be viewed as instances of the category-theoretic concepts of functor and natural isomorphism, and we use this to bring out the intuition behind these concepts, and also to critique them. Also presented are some suggestions for further work, including a hoped-for application to entanglement entropy in quantum field theory.

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