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Checking this. IT is a fucking long journey\nfor a simple thing. 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Fixed.\n\nTODO:\n1. Test the Fermion case\n2. 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Now there are obvious differences\nin the construction of the A.x.B series.\n+ found a way to integrate the informaion about\nthe charge==QN change dQ introduced by a single operator, e.g.\nS^+ connects Sz and Sz-1 ==> <Sz|S^+|Sz-1>\nC_up  connects QN and QN+1_up <[Nup,Ndw]|C_up|[Nup+1,Ndw]\nThis information (dQ) can be integrated into the list_operators\n+ found an automatic (possibly parallel) way to\nextract a given block of an operator so to make the construction\nalgorithm we have now smoother.","shortMessageHtmlLink":"Intermediate commit."}},{"before":"a3c79a01742b43b35d8ff7bc55b41f5ea0c0b488","after":"f0a84af9229a4de5c1ba42bddf1844c2919b36a8","ref":"refs/heads/dev_cmplx_bhz","pushedAt":"2024-03-30T10:15:22.000Z","pushType":"push","commitsCount":1,"pusher":{"login":"aamaricci","name":"Adriano Amaricci","path":"/aamaricci","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/2298328?s=80&v=4"},"commit":{"message":"Intermediate commig, cleaning kron_hm_1d","shortMessageHtmlLink":"Intermediate commig, cleaning kron_hm_1d"}},{"before":"500ccfe27ac6bec4d97d0ae60445929226c85673","after":"a3c79a01742b43b35d8ff7bc55b41f5ea0c0b488","ref":"refs/heads/dev_cmplx_bhz","pushedAt":"2024-03-29T20:57:05.000Z","pushType":"push","commitsCount":3,"pusher":{"login":"aamaricci","name":"Adriano Amaricci","path":"/aamaricci","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/2298328?s=80&v=4"},"commit":{"message":"Intermediate commit.\nThe kron_hm_1d_2bands reproduces the correct energy and HxV without\nmatrix storage for the 1band model.\n\nH^sb = H^L.x.1 + 1.x.H^R + H^LR\nis applied without constructing it and exploiting the quantum numbers.\n\nH^L is decomposed and applied to the columns of \\psi_lr\nH^R is decomposed and applied to the rows of \\psi_lr\nH^LR is decomposed into a sum of product \\sum_a A^a.x.B^a and applied to \\psi_lr\nEach A^a and B^a are decomposed in blocks from QNs.\n\nThe algorithm is pretty involved but:\n1. one shot application of the full Hamiltonian (2 spins, 1band, h.c. activated) is tested\n2. evaluation of energy in o-o + o-o 4 sites structure is obtained and is identical to the\none obtained by constructing and storing H^sb using it to apply H^sb \\psi_lr.\n\nNext steps:\nA. test 2 bands\nB. clean and import into the DMRG code to check whether the algorithm is robust to matrix rotations/truncation.","shortMessageHtmlLink":"Intermediate commit."}},{"before":"cc4f705a9e70342785def853ac78fdb608789bdd","after":"500ccfe27ac6bec4d97d0ae60445929226c85673","ref":"refs/heads/dev_cmplx_bhz","pushedAt":"2024-03-02T14:42:24.000Z","pushType":"push","commitsCount":2,"pusher":{"login":"aamaricci","name":"Adriano Amaricci","path":"/aamaricci","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/2298328?s=80&v=4"},"commit":{"message":"Code updated. Port to CMPLX: completed.\nTested Heisenberg 1d: Ok.\n\nSUSPICIOUS BEHAVIOR:\nIssues arise from the construction of the H_left.right in the driver.\nThere one needs to build the Hamiltonian connecting a left block to a right one.\nThis involves hopping processes in both directions (left-> right, right->left). The\nlatter are the Hermitian conjgate of the former.\nIf coding the H_lr contribution by explicitly writing both contribution l>r, r>l\nthe resulting Hamiltonian IS NOT Hermitian (and some loss and misbehavior is observed).\nThe correct result is obtained by coding H_l>r and then taking adding up the H.c. part,\nand finally the diagonal terms.\nE.g. Heisenberg:\nH = jx/2*Sp.Sp^+ + jx/2*Sp^+.Sp + Jz*Sz.Sz (Not working)\nbecomes\nHz = Jz*Sz.Sz\nHp = Jx/2*Sp.Sp^+\nH  = Hz + Hp + Hp^+ (Working)\nThere should be something weird going on in the wrap of kron+dgr. I am investigating.","shortMessageHtmlLink":"Code updated. 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