News

De las Cuevas group De las Cuevas group

Beyond operator systems

Operator systems are based on the cone of positive semidefinite matrices. What happens if we generalize this to other convex cones? We introduce general conic systems and show that many important theorems still hold. (arXiv:2312.13983)

Read More
Gemma De les Coves Gemma De les Coves

The grammar of physical interactions

We see classical spin models as languages and classify them in the Chomsky hierarchy. These allows us to say that the grammar of such physical interactions is at most context-sensitive.

Read More
Gemma De les Coves Gemma De les Coves

Which quantum magic squares can be purified?

Purifying establishes a relation to the ideal world. The opposite of purifying —landing in our imperfect, non-ideal world— is described by the matrix convex hull. Here we show that semiclassical magic squares can be purified to quantum Latin squares. (arXiv:2209.10230)

Read More
Gemma De les Coves Gemma De les Coves

How complex is an Ising model?

That depends on how you measure it. We’ve thought of a new way of measuring it, which captures the complexity of the local structure of its function graph (arxiv:2208.08301)

Read More