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quant-ph2012★ 7 cited
Matrix Product State representation for Slater Determinants and Configuration Interaction States
Pietro Silvi, Davide Rossini, Rosario Fazio +2
Slater determinants are product states of filled quantum fermionic orbitals. When they are expressed in a configuration space basis chosen a priori, their entanglement is bound and…
quant-ph2012★ 11 cited
Measuring quantumness via anticommutators
Rosario Fazio, Kavan Modi, Saverio Pascazio +2
We introduce a method to witness the quantumness of a system. The method relies on the fact that the anticommutator of two classical states is always positive. We show that there i…