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Title: Density matrix renormalization group in the Heisenberg picture
Authors: Hartmann, M.J.
Prior, J.
Clark, S.R. 
Plenio, M.B.
Issue Date: 2-Feb-2009
Citation: Hartmann, M.J., Prior, J., Clark, S.R., Plenio, M.B. (2009-02-02). Density matrix renormalization group in the Heisenberg picture. Physical Review Letters 102 (5) : -. ScholarBank@NUS Repository.
Abstract: In some cases the state of a quantum system with a large number of subsystems can be approximated efficiently by the density-matrix renormalization group, which makes use of redundancies in the description of the state. Here we show that the achievable efficiency can be much better when performing density-matrix renormalization group calculations in the Heisenberg picture, as only the observable of interest but not the entire state is considered. In some nontrivial cases, this approach can even be exact for finite bond dimensions. © 2009 The American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.102.057202
Appears in Collections:Staff Publications

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