Topological Phases of an Interacting Majorana Benalcazar–Bernevig–Hughes Model

Round 1

Reviewer 1 Report

Recently, higher-order topological states have attracted intense studies in the field of condensed matter physics. This concetp has been generalized to superconductors and bosonic systems. Here based on a Majorana analog of the well-known BBH model, the authors investigate the effect of nearest-neighbor repulsive interactions using DMRG method. They explicitly show that the Majorana higher-order topological phase is robust to repulsive interactions. This manuscript is of significance in understanding the interplay between correlations and higher-order topological property. It is well written, and the results are reasonable. Hence I agree with its publicaiton in its present form.

Author Response

We would like to thank the Referee for the appreciation of our manuscript.

As required, in the revised version, we have done minor spell check required.

Reviewer 2 Report

I reviewed the manuscript " Topological phases of an interacting Majorana Benalcazar-Bernevig-Hughes model” by Alfonso Maiellaro et al., prepared for the publication in Condensed Matter (ISSN 2410-3896).

The authors use Density Matrix Renormalization Group (DMRG) to investigate the Benalcazar-Bernevig-Huges (MBBH) model with the main topological properties including Majorana fermions with a quasi one-dimensional limit N = 4 chains, thus with corner Majorana states. The method is advanced and reliable, it goes beyond the mean field approximation. The results are interesting, the manuscript is well-written and warrants publication.

I suggest its publication in the present form in Condensed Matter.

Author Response

We would like to thank the Referee for the appreciation of the manuscript.

As requested, in the revised version, we have done the minor spell check required.