Magnetically Induced Two-Phonon Blockade in a Hybrid Spin–Mechanical System
Round 1
Reviewer 1 Report
Comments and Suggestions for Authors
Phonon blockade phenomena is an analogue of well-known photon blockade. This specific quantum effect is based on a strong mechanical nonlinearity (anharmonicity) of some nanomechanical resonators with spin-phonon coupling.
The reviewed paper is written in good scientific language and has a clear problem statement. The article contains a detailed literature review of the research topic and is characterized by an exhaustive presentation of the material.
As a reviewer I would like to make the following suggestion to authors: in Figure 7 they should present the results using the dimensionless temperature kBT/Ñωm, on the x-axis, instead of nth.
In addition, I am somewhat discouraged by the purely numerical result of obtaining the two-phonon blockade effect in this paper. A natural question arises: is it possible to solve this problem analytically even to some extent. For example, to model relaxation coupling with thermal reservoir not by the conventional Lindblad superoperator, but by the usual Bloch equations (the approximation of relaxation times T1 and T2) ?
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for Authors
The work entitled “Magnetically induced two-phonon blockade in a hybrid spin-mechanical system”, by H.-Y. Liu, T.-S. Yin and A. Chen seems technically clean. However, to me, it looks quite dry, since has no hint about real systems fulfilling the debated features and corresponding relevant instrumental measurements.
I will recommend minor revision, demanding to add, both in introduction and along the work, concrete examples where the combination of spin and phonon-based keywords and the outlined model is relevant.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
