Tensor Renormalization Group and its Application
Tensor Renormalization Group and its Application
Tensor Renormalization Group and its Application
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I. Poor Man’s SRG: entanglement mean-field approach(env) ij, kl ,Z=Tr MM = ∑ M Mijklenvkl ijM = ∑ U Λ Vkj, il kj, n n il,n4n=1... DM ≈ Λ Λ Λ Λenv 1/ 2 1/ 2 1/ 2 1/2kl,ij k l i jMean field (or cavity) approximationBond field – mean field variableΛΛ = Λ 1/2 Λ 1/2From environmentFrom system