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Physical Review Letters
Volumn 69, Issue 19, 1992, Pages 2863-2866
Density matrix formulation for quantum renormalization groups
Author keywords

[No Author keywords available]
Indexed keywords

EID: 3442895828     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevLett.69.2863     Document Type: Article
Times cited : (7676)
References (12)
  • 3
    • 84927855027 scopus 로고    scopus 로고
    • Knowledge of HA prime alone is not sufficient to form the block Hamiltonian at the next iteration. In addition, one needs information on how to form the interaction between two blocks. One needs, in addition to HA prime , m times m matrices representing (for spin models) matrix elements of Siz, Si+, and Si-, for the two sites i on the edges of a block. Using the spin operator matrices for the right-hand site i of the left block and the left-hand site i + 1 of the right block, one can easily reconstruct the interaction S vecicdot S veci+1 between the blocks. These operator matrices are treated in the same fashion as the Hamiltonian, using an analog of Eq. (1), for example.

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