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Scaling of disorder operator at deconfined quantum criticality
by Yan-Cheng Wang, Nvsen Ma, Meng Cheng, Zi Yang Meng
This Submission thread is now published as
|Authors (as Contributors):||Meng Cheng|
|Date submitted:||2022-08-03 15:56|
|Submitted by:||Cheng, Meng|
|Submitted to:||SciPost Physics|
We study scaling behavior of the disorder parameter, defined as the expectation value of a symmetry transformation applied to a finite region, at the deconfined quantum critical point in (2+1)$d$ in the $J$-$Q_3$ model via large-scale quantum Monte Carlo simulations. We show that the disorder parameter for U(1) spin rotation symmetry exhibits perimeter scaling with a logarithmic correction associated with sharp corners of the region, as generally expected for a conformally-invariant critical point. However, for large rotation angle the universal coefficient of the logarithmic corner correction becomes negative, which is not allowed in any unitary conformal field theory. We also extract the current central charge from the small rotation angle scaling, whose value is much smaller than that of the free theory.
Published as SciPost Phys. 13, 123 (2022)
List of changes
Responding to the comment of referee 1, we have updatd Fig.4 and Fig.9 in the revised manuscript.
Responding to the comment of referee 2, we added a sentence in the revised manuscript to point out that the quantification of the error bar in $s(\theta)$ is certainly a nontrivial issue.
Submission & Refereeing History
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Reports on this Submission
Anonymous Report 2 on 2022-8-9 (Invited Report)
I thank the authors for implementing the requested changes.
For finalizing the paper, the authors should
(i) correct the typo " chis-quare" in the caption of Fig. 4, and
(ii) include errors bars in Fig. 4(b).
Anonymous Report 1 on 2022-8-4 (Invited Report)
Although the authors have not changed the analysis of error bars, they have at least flagged the issue in the text. Therefore I am happy for the paper to proceed to publication.
Author: Meng Cheng on 2022-08-17 [id 2737](in reply to Report 2 on 2022-08-09)
We thank the referee for his/her comments. We have corrected the typo " chis-quare" in the caption of Fig. 4 in the revised manuscript.
Regarding errors bars in Fig. 4(b), since the fitting deviations $\Delta(l)$ is the difference between the fitting curves and the raw data of the disorder operator, they are an auxiliary quantities to show the quality of the fittings. Their errorbars entirely come from those of the raw data of the disorder operators as shown in Fig.4 (a). Therefore, we do not see any reason to add error bars for $\Delta(l)$ and keep the Fig.4 (b) as is.