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- W2118128552 abstract "We propose the use of entanglement renormalization techniques to study boundary critical phenomena on a lattice system. The multiscale entanglement renormalization ansatz (MERA), in its scale invariant version, offers a very compact approximation to quantum critical ground states. Here we show that, by adding a boundary to the MERA, an accurate approximation to the ground state of a semi-infinite critical chain with an open boundary is obtained, from which one can extract boundary scaling operators and their scaling dimensions. As in Wilson's renormalization-group formulation of the Kondo problem, our construction produces, as a side result, an effective chain displaying explicit separation of energy scales. We present benchmark results for the quantum Ising and quantum XX models with free and fixed boundary conditions." @default.
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- W2118128552 date "2010-10-29" @default.
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- W2118128552 title "Boundary quantum critical phenomena with entanglement renormalization" @default.
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- W2118128552 doi "https://doi.org/10.1103/physrevb.82.161107" @default.
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