SciPost Submission Page
Dipolar magnetostirring protocol for three-well atomtronic circuits
by Héctor Briongos-Merino, Felipe Isaule, Montserrat Guilleumas, Bruno Juliá-Díaz
This is not the latest submitted version.
Submission summary
| Authors (as registered SciPost users): | Héctor Briongos-Merino |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2501.05301v1 (pdf) |
| Date submitted: | 2025-01-20 14:47 |
| Submitted by: | Briongos-Merino, Héctor |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Computational |
Abstract
We propose a magnetostirring protocol to create persistent currents on an annular system. Under this protocol, polar bosons confined in a three-well ring circuit reach a state with high average circulation. We model the system with an extended Bose-Hubbard Hamiltonian and show that the protocol can create circulation in an atomtronic circuit for a range of tunable parameters. The performance and robustness of this scheme are examined, in particular considering different interaction regimes. We also present a method for predicting the optimal protocol parameters, which improves protocol's scalability and enables its application to systems with large numbers of bosons. This overcomes computational limitations and paves the way for exploring macroscopic quantum phenomena.
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 -- All the results are sound and clearly discussed in detail
2 -- The underlying many-body theory is generally explained well.
3 -- The manuscript is well written, including the included appendices for the mean-field description
4 -- Could be experimentally tested within the state-of-the-art could atoms infrastructure.
Weaknesses
1 -- The manuscript is too technical. Whilst the protocol is good, it is also heavily reliant on numerical parameter optimization. The manuscript would greatly benefit if there were analytical results such as for example having a clear microscopic derivation for the parameter prediction to back up the numerics.
2 -- The section of the `Circulation creation protocol' lacks a bit of clarity.
Report
In this work, the authors present a new protocol to generate persistent currents in a ring-shaped lattice by applying magnetostirring. Extending the scheme utilized to generate vortices in diploar gases, the authors demonstrate how a rotation can be induced in the condensate. They perform an extensive investigation of this protocol (robustness and performance) for a wide range of parameters and operating conditions. The results achieved are of great interest to the cold atoms community and present a new direction atomtronics. Given
the strengths and weaknesses outlined above, I think the manuscript as it is would be better suited in SciPost Physics Core.
Recommendation
Accept in alternative Journal (see Report)
Report
Dipolar magnetostirring protocol for three-well atomtronic circuits
Hector Briongos-Merino, Felipe Isaule, Montserrat Guilleumas, Bruno Juli´a-D´ıaz
The authors develop a novel method to generate persistent currents in a ring-shaped ultracold Bose-Einstein condensate (BEC) using dipolar interactions. Through leveraging the anisotropic, long-range dipole–dipole interactions, the authors propose inducing superfluid flow via rotating the orientation of the dipoles, i.e. “magnetostirring”. The authors explore the proposal numerically in a ring of three potential wells, the minimal system required to have flow, within the extended Bose-Hubbard model and confirm their predictions with a mean-field analysis.
The authors describe a robust protocol by identifying the optimal parameters and conditions for maximal circulation. They develop a method to predict the optimal stirring frequencies, and how to scale for larger systems. This enables applying the scheme to larger number of bosons and more realistic systems.
In my opinion the paper satisfies the criterion to be published in SciPost and would be of interest to a broad range of physicists. The work is interesting, the calculations appear correct and thorough, and in my opinion is an excellent addition to the field of atomtronics and the authors previous work (see Ref[33] for example).
The manuscript is mostly well written, there are some minor typos to be corrected. In my opinion the authors need to be more careful referencing. For example, some additional references for the extended Bose-Hubbard Hamiltonian and the derivation of the transformed Hamiltonian (Eqs. 3 and 4), it would be useful for more citations of the single particle eigenstates, the free boson circulation calculation, and GP equation.
Additionally, the works of:
Srivatsa B Prasad, Thomas Bland, Brendan C Mulkerin, Nick G Parker, Andrew M Martin PRA 100 023625 (2019)
Srivatsa B Prasad, Brendan C Mulkerin, Andrew M Martin PRA 103 033322 (2021)
should be cited when referring to the magnetostiring in dipolar BECs (second page fifth paragraph). In particular, the paper PRA 103 033322 (2021) is cited by Ref. [34] as the motivation of their protocol (along with another PRL by the same authors, however this is not as relevant here.).
Minor comments and questions
1. The authors provide a very broad conclusion on the use of realizing “their utility as rotation or gravity sensors” - this seems a very broad statement. Can the authors expand on how the atomtronic system would be used as
a rotation or gravity sensor? Or indeed, the experimental feasibility of their protocol.
2. The figures are mostly clear and well described, however the font seems too small, especially in the insets. The authors should increase the font sizes.
3. In systems with many sites, or a continuous toroidal condensate, do the authors expect their methodology to still produce a persistent current?
Overall, this manuscript represents a relevant contribution, suitable for publication in SciPost after addressing these minor issues.
Recommendation
Publish (easily meets expectations and criteria for this Journal; among top 50%)