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Engineered Swift Equilibration of brownian particles: consequences of hydrodynamic coupling
by Salambô Dago, Benjamin Besga, Raphaël Mothe, David Guéry-Odelin, Emmanuel Trizac, Artyom Petrosyan, Ludovic Bellon, Sergio Ciliberto
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Submission summary
| Authors (as registered SciPost users): | Ludovic Bellon · DAGO Salambô · Emmanuel Trizac |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2005.04939v1 (pdf) |
| Date submitted: | 2020-05-12 02:00 |
| Submitted by: | Bellon, Ludovic |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Experimental |
Abstract
We present a detailed theoretical and experimental analysis of Engineered Swift Equilibration (ESE) protocols applied to two hydrodynamically coupled colloids in optical traps. The second particle slightly perturbs ($10\%$ at most) the response to an ESE compression applied to a single particle. This effect is quantitatively explained by a model of hydrodynamic coupling. We then design a coupled ESE protocol for the two particles, allowing the perfect control of one target particle while the second is enslaved to the first. The calibration errors and the limitations of the model are finally discussed in details.
Current status:
Reports on this Submission
Anonymous Report 2 on 2020-7-22 (Invited Report)
- Cite as: Anonymous, Report on arXiv:2005.04939v1, delivered 2020-07-22, doi: 10.21468/SciPost.Report.1849
Strengths
1) Very readable review of previous work.
2) Clear presentation of the new experiment and its theoretical analysis.
Weaknesses
1) English could be somewhat improved. Examples: statements like "a sum of sinus of different frequencies ...", "Besides the experimental results ..." should be rewritten, "explicit" is rarely used as a verb etc.
2) In Fig. 2 one needs to compare two panels; it would be nice if both used the same independent variable, either dimensionless time s or time in physical units.
Report
The paper presents an extension of the previously developed Engineered Swift Equilibration (ESE) protocol to two hydrodynamically coupled Brownian particles. The experimental results agree well with the theory.
The paper is interesting and clearly written. I recommend that it is accepted after the authors consider referees' comments.
Requested changes
The authors are encouraged to address weaknesses mentioned above.
Report 1 by Ramón Castañeda-Priego on 2020-6-1 (Invited Report)
- Cite as: Ramón Castañeda-Priego, Report on arXiv:2005.04939v1, delivered 2020-06-01, doi: 10.21468/SciPost.Report.1726
Strengths
1. Careful and systematic (experimental and theoretical) analysis of the Engineered Swift Equilibration (ESE) of two hydrodynamically coupled colloids in optical traps.
2. Design of an ESE protocol that does not depend on the hydrodynamic coupling.
3. The ESE protocol can be easily extended to more complicated situations and/or configurations.
Report
Authors report on a systematic (experimental and theoretical) analysis of the Engineered Swift Equilibration (ESE) of two hydrodynamically coupled colloids individually trapped in optical tweezers. They designed an ESE protocol that does not depend on the hydrodynamic coupling. In particular, they found that the presence of the second particle slightly affects the response of the first one; the effect is explained in terms of the hydrodynamic correlations between colloids.
In my opinion, the discussion based on the hydrodynamic coupling is clear and convincing, and the results are interesting and deserve to be published. Furthermore, the manuscript is well written and organized. However, authors should carefully review and correct the English; there are minor typos in the text, prior to the publication of the manuscript. Figures can also be improved.
Requested changes
1. English should be properly reviewed and corrected; there are minor typos in the text.
2. Figures can be drastically improved to better understand their content.