Distinguishing Phases with Ansatz Wavefunctions

Details Distinguishing Phases with Ansatz Wavefunctions Distinguishing Phases with Ansatz Wavefunctions

2009-03-08

arxiv.org/abs/0903.1454v2

Phys. Rev. B 81, 085118 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 6 figures, with new results and significantly extended discussion

Scientific paper

10.1103/PhysRevB.81.085118

We propose an indistinguishability measure for assessment of ansatz wavefunctions with numerically determined wavefunctions. The measure efficiently compares all correlation functions of two states and can therefore be used to distinguish phases by defining correlator classes for ansatz wavefunctions. It also allows identification of quantum critical points. We demonstrate the approach for the transverse Ising model, using the matrix product state formalism with the time evolving block decimation algorithm.

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