Deterministic Shaping of Quantum Light Statistics

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The article deals with a two-mode parametric oscillator with a Kerr-type dispersive interaction between the modes. The authors propose generating states deterministically by adjusting the system parameters. A study of the possibilities and limitations of experimental implementation of the system is conducted.

I found the content of the article to be interesting. However, while reading it, I noticed that the article might be a bit confusing for readers to grasp. I believe there's room for improvement in terms of its structure and presentation. Perhaps refining the organization and enhancing the clarity of the sections would make it more engaging and easier to follow for readers.

Regarding the plots in the article, it would be beneficial in Fig. 1 to display, if possible, all curves fully on the graph. Also, some notations used, besides being confusing at times, are not explained.

Author Response

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Reviewer 2 Report

Comments and Suggestions for Authors

 

In the manuscript entitled “Deterministic Shaping of Quantum Light”, Compton and Kuzyk study the deterministic shaping of quantum light in a high-Q optical resonator when strong second and third order nonlinearities are achievable. They use the high Kerr-nonlinearity to construct a number-selective optical parametric oscillation Hamiltonian, so that the resulting bosonic state can be highly non-classical.

This work presents an interesting approach to generate some specific non-classical bosonic state in a cavity. Below are some comments:

1. To demonstrate the practical usage of this proposal, the authors need to add more numerical simulation results with photon loss considered. Especially, the authors need show the requirement on the cooperativity.

2. In the circuit QED community, there are formerly similar discussions on the construction of number-selective phase gate [Phys. Rev. Lett. 115, 137002 (2015)] based on high nonlinearity between microwave cavity and transmon qubit. The authors may cite the paper and make comparison.

 

 

 

 

Author Response

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Reviewer 3 Report

Comments and Suggestions for Authors

This work demonstrates a new method for deterministic shaping of quantum light in optical parametric oscillation (OPO) process. Through theoretical analysis and simulation, they find that strong kerr nonlinearity can introduce strongly photon number dependent into the interaction between the field states. Basing on this characteristic, they can shape the noise of a two-mode-squeezed cavity state with minimal dephasing. The idea and is very interesting, and provides a new way for control of optical quantum states. However, I think there are some analyses need to be added in this manuscript to make the significance of this work clearer. 

 

First, the spectrum of photons generated in OPO process relates to the cavity resonance spectrum. So, can arbitrary spectrum shaping be achieved by this method, or only the cavity resonance defined spectrum (Lorentz Spectral Line for example). 

 

Secondly, could the whole number selective optical parametric oscillation process be achieved in reality in the future? Numerical analysis taking the parameters of real material limit should be added to demonstrate the feasibility of this method. 

 

Generally, I think this manuscript propose a novel method for shaping of quantum light, and could be accept by Photonics if the above analyses are added. 

Comments on the Quality of English Language

The English Language needs to be improved carefully to make this work more readable.

Author Response

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Reviewer 4 Report

Comments and Suggestions for Authors

In the manuscript entitled ‘’Deterministic shaping of quantum light’’ by Compton and Kuzyk, they theoretically proposed a method to generate nonclassical light via photon number state selective interactions in nonlinear material. They obtain their conclusion by expanding the nonlinear polarization in a power series of the displacement field amplitudes up to third order, in which optical parametric oscillation and Kerr effects can be introduced. By combining Kerr nonlinearities in parametric down conversion, the normal squeezed state between idler and signal can be detuned, making two mode squeezing amplitude dependent. Numerical simulations confirm that nonclassical light can be obtained in certain conditions. Then they discussed the conditions to observe the proposed results in experiments. Their results provide a useful guidance for future experiments on the same topic.

 

I recommend this manuscript to be published in Photonics.

Author Response

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Reviewer 5 Report

Comments and Suggestions for Authors

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Comments for author File: Comments.pdf

Comments on the Quality of English Language

Quality of English is good. Only minor editorial fixings needed.

Author Response

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Reviewer 6 Report

Comments and Suggestions for Authors

The main result of this manuscript is a scheme to change the physical properties, like the shape, of photon pulses. Here this is achieved through the use of cavity interactions which are non-linear and depend on the number of photons present. The authors claim that their scheme might find applications in quantum technology, like communication, metrology and computing. 

 

Overall, the paper is well written. The presented results seem original and substantial and are likely to be of some practical interest. My only suggestion is to extend the introduction to include a wider discussion of related work by other people and of the specific advantages and disadvantages of the proposed state preparation scheme.

Below are some comments:

 

1) The statement that measurement-based state preparation schemes are necessarily deterministic is wrong. Previous designs of measurement-based schemes utilise for example the quantum Zeno effect to prepare quantum systems with unit probability in an entangled state. See for example: Quantum computing using dissipation to remain in a decoherence-free subspace, A. Beige, D. Braun, B. Tregenna, and P. L. Knight, Phys. Rev. Lett. 85, 1762 (2000). Please correct this statement in the Introduction. 

 

2) Another alternative way of shaping light pulses is to control their generation. This has already been done very successfully for single photons in the group of Kuhn. References to their results need to be included in the introduction. See for example: Single Photons Made-to-Measure, Genko S Vasilev et al 2010 New J. Phys. 12 063024.

 

3) There is a full-stop missing in line 79.

4) There is typo in line 336.

Once the above comments have been taken into account, I am happy to reconsider the manuscript for publication in MDPI Physics.

Author Response

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Round 2

Reviewer 3 Report

Comments and Suggestions for Authors

I think the authors have answered all my questions clearly, and this work can be accept by the Photonics in the current form.

Comments on the Quality of English Language

No further comments.