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IOP Publishing, New Journal of Physics, 10(9), p. 361-361, 2007

DOI: 10.1088/1367-2630/9/10/361

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A variational method based on weighted graph states

Journal article published in 2007 by Simon Anders ORCID, Hans J. Briegel, Wolfgang Dür
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

In a recent article [Phys. Rev. Lett. 97 (2006), 107206], we have presented a class of states which is suitable as a variational set to find ground states in spin systems of arbitrary spatial dimension and with long-range entanglement. Here, we continue the exposition of our technique, extend from spin 1/2 to higher spins and use the boson Hubbard model as a non-trivial example to demonstrate our scheme. ; Comment: 36 pages, 13 figures