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quant-ph2020
Can entanglement hide behind triangle-free graphs?
Satvik Singh
We present an alternative approach to unveil a different kind of entanglement in bipartite quantum states whose diagonal zero patterns in suitable matrix representations admit a ni…
quant-ph2020
Diagonal unitary and orthogonal symmetries in quantum theory
Satvik Singh, Ion Nechita
We analyze bipartite matrices and linear maps between matrix algebras, which are respectively, invariant and covariant, under the diagonal unitary and orthogonal groups' actions. B…