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quant-ph2008★ 45 cited
Entanglement of two blocks of spins in the critical Ising model
P. Facchi, G. Florio, C. Invernizzi +1
We compute the entropy of entanglement of two blocks of L spins at a distance d in the ground state of an Ising chain in an external transverse magnetic field. We numerically study…
quant-ph2008★ 169 cited
Optimal quantum estimation in spin systems at criticality
Carmen Invernizzi, Michael Korbman, Lorenzo Campos Venuti +1
It is a general fact that the coupling constant of an interacting many-body Hamiltonian do not correspond to any observable and one has to infer its value by an indirect measuremen…