#  Peter Love (Tufts): Non-contextual approximations, Magic, and Correlation energy 

 



####  calendar\_today Date and Time 

 **May 13, 2026** 

 03:00PM - 04:00PM EDT 

####  pin\_drop Location 

 **Jefferson 368**  



 

 



 

Title: Non-contextual approximations, Magic, and Correlation energy

Abstract: What distinguishes quantum from classical computation? Contextuality, entanglement and more recently magic are leading measures of nonclassicality. I will describe non-contextual Hamiltonians, which arise from a generalization of the Kochen-specker paradox and Peres-Mermin square. I will give various properties of their eigenspaces and define contextual subspace methods that allow any Hamiltonian to be treated as a sum of contextual and non-contextual parts. Recent interest in the stabilizer Renyi entropy as a measure of non-stabilizerness motivates the question of how "magical" are contextual subspace methods? I will describe recent work evaluating magic in contextual subspaces for electronic structure problems, and connecting magic and correlation energy in these subspaces.



 

 



 

 

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