SciPost Submission Page
Systematic analysis of relative phase extraction in one-dimensional Bose gases interferometry
by Taufiq Murtadho, Marek Gluza, Khatee Zathul Arifa, Sebastian Erne, Jörg Schmiedmayer, Nelly Huei Ying Ng
This is not the latest submitted version.
Submission summary
| Authors (as registered SciPost users): | Nelly Ng |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2403.05528v2 (pdf) |
| Code repository: | https://github.com/inQ-NTU/ToF_expansion |
| Date submitted: | 2024-05-13 12:23 |
| Submitted by: | Ng, Nelly |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
Spatially resolved relative phase measurement of two adjacent 1D Bose gases is enabled by matter-wave interference upon free expansion. However, longitudinal dynamics is typically ignored in the analysis of experimental data. We provide an analytical formula showing a correction to the readout of the relative phase due to longitudinal expansion and mixing with the common phase. We numerically assess the error propagation to the estimation of the gases' physical quantities such as correlation functions and temperature. Our work characterizes the reliability and robustness of interferometric measurements, directing us to the improvement of existing phase extraction methods necessary to observe new physical phenomena in cold-atomic quantum simulators.
Author indications on fulfilling journal expectations
- Provide a novel and synergetic link between different research areas.
- Open a new pathway in an existing or a new research direction, with clear potential for multi-pronged follow-up work
- Detail a groundbreaking theoretical/experimental/computational discovery
- Present a breakthrough on a previously-identified and long-standing research stumbling block
Current status:
Reports on this Submission
Strengths
1 - Addresses the effects of longitudinal expansion dynamics on phase extraction from Bose-gas interferometry.
2 - In depth explanation and analysis which is easy to understand and will be useful for experimentalists.
Weaknesses
none
Report
The authors investigate the effect that longitudinal expansion has on phase extraction from BEC interference experiments. The longitudinal dynamics is often neglected in these experiments, mostly due to simplifying the fitting of the interference fringes, however it can have an effect on the extraction of the relative phase. This shown in great detail by the authors, who systematically address this shortcoming through extensive simulations and calculations of different experimentally measurable quantities of interest. This work will be of great interest to experimental cold atom groups and promises to significantly improve relative phase measurements, allowing for more sensitive measurements, with interesting applications to probe non-equillibrium dynamics.
I find the paper well written and find no major shortcomings. I think it fits well within the scope of SciPost Physics and recommend it for publication.
Requested changes
Some minor things:
1 - After Eq.4 I would suggest referring to A(z,t) as the intetference peaks amplitudes, to be more exact.
2 - in the caption of Fig.3 there is a typo on the first line "anmd".
3 - On first viewing it took me some time to discern the different colors in Fig.6, red, yellow and blue, as the bars are transparent which leads to a plethora of different colors - mostly shades of brown! Its not very clear what is going on here, so I would suggest that the authors consider modifying this figure. I would suggest having the input remaining as is, but the reconstructed distributions at the two times being successively thinner bars without transparency.
Recommendation
Publish (easily meets expectations and criteria for this Journal; among top 50%)