Enhanced Readout from Spatial Interference Fringes in a Point-Source Cold Atom Inertial Sensor
Zhaoying Wang
Round 1
Reviewer 1 Report
This manuscript demonstrated the enhancement of readout of spatial interference fringes from a point-source cold atom interferometer. By introducing principal component analysis, the precision of measurement of angular velocity is improved double-fold compared with conventional fitting to the theoretical model.
The experiment has been described in detail and results shown properly. I believe the proposed method is useful also in other experiments and instrumentation of quantum inertia sensors. Therefore, I recommend the manuscript to the board for publication.
I found, however, some detail confusing to me, and I hope the authors will improve by clarifying these points.
1. In Figure 7 is shown the predicted curve compared to linear fitting of the measured data. There is a mismatch between the prediction (and most of the data points) with the linear fitting, which is confusing to me.
2. Line 214-215, “a training set comprises of 100 images”. Is the size of training set influencing the enhancement by PCA? I would like to know how the size is decided or if it is just empirical.
3. Line 262-266, “......typically improved by 9-12dB for beam-tilt phase shear and 5-10dB for asymmetrical timing phase shear.” The SN ratio enhancement described here has a wide range. Does this mean the enhancement is not stable or is it related to other factors? In addition, how is the SN ratio here evaluated?
No comments
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The work presented here is scientifically sound, and presents important results in the field of rotation sensing using a point source atom interferometer. As such, I recommend acceptance of the paper after the following comments are addressed.
1. Proposals exist for enhancing the sensitivity of a point source atom interferometer by employing the process of large momentum transfer. See, for example, J. Li et al., “High Sensitivity Multi-Axes Rotation Sensing Using Large Momentum Transfer Point Source Atom Interferometry,”Atoms, 2021, 9, 51. The authors should cite this paper, and comment briefly on the suitability of applying the Principal Component Analysis for this approach.
2. There are some grammatical errors and typos in the paper. These should be fixed. Following is a brief list:
(a) On line 98, replace “iertia” with “inertial”
(b) On line 105, replace “algorism” with “algorithm”
(c) On line 126, replace “interfering the” with “interfering with the”
(d) On line 254, replace “is” with “are”
2. There are some grammatical errors and typos in the paper. These should be fixed. Following is a brief list:
(a) On line 98, replace “iertia” with “inertial”
(b) On line 105, replace “algorism” with “algorithm”
(c) On line 126, replace “interfering the” with “interfering with the”
(d) On line 254, replace “is” with “are”
Author Response
The authors express their sincere gratitude to the esteemed reviewer for generously dedicating their valuable time and exerting considerable effort in thoroughly evaluating the manuscript. Furthermore, the authors wish to address the reviewer's inquiries as outlined below.
- The suggested reference offers a valuable technique aimed at enhancing the sensitivity of a point-source atom interferometer. Considering its significance, it is warranted to include a mention of this proposed method.
- The authors conducted a thorough review of the manuscript and have diligently rectified all typographical and grammatical errors. The resubmitted manuscript now reflects the necessary corrections.
