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4 votes
5 answers
375 views

How can one represent vector addition diagrammatically in categorical quantum mechanics?

I am currently studying the use of string diagrams and monoidal categories in quantum mechanics, in particular the recent papers of Coecke & Kissinger, with an eye towards potential use in specifying …
8 votes
1 answer
185 views

Temporal semantics for string diagrams

Suppose I have a string diagram $D$ which involves a set of strings $S$ and atomic processes $A$. Formally, we should think of this as a canonically chosen map in the free symmetric monoidal category …