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- W3048390448 abstract "We study the response of critical Resonating Valence Bond (RVB) spin liquids to doping with longer-range singlets, and more generally of U(1)-symmetric tensor networks to non-symmetric perturbations. Using a field theory description, we find that in the RVB, doping constitutes a relevant perturbation which immediately opens up a gap, contrary to previous observations. Our analysis predicts a very large correlation length even at significant doping, which we verify using high-accuracy numerical simulations. This emphasizes the need for careful analysis, but also justifies the use of such states as a variational ansatz for critical systems. Finally, we give an example of a PEPS where non-symmetric perturbations do not open up a gap and the U(1) symmetry re-emerges." @default.
- W3048390448 created "2020-08-18" @default.
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- W3048390448 date "2020-08-11" @default.
- W3048390448 modified "2023-09-27" @default.
- W3048390448 title "Robustness of critical U(1) spin liquids and emergent symmetries in tensor networks" @default.
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