SciPost Submission Page
Coherent Generation and Protection of Anticoherent Spin States
by Jérôme Denis, Colin Read, John Martin
Submission summary
| Authors (as registered SciPost users): | Jérôme Denis · John Martin |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202505_00033v2 (pdf) |
| Code repository: | https://github.com/Jerome-Denis/ACStatesGeneration |
| Date accepted: | Dec. 2, 2025 |
| Date submitted: | Nov. 13, 2025, 11:29 a.m. |
| Submitted by: | John Martin |
| Submitted to: | SciPost Physics Core |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
We report the first protocol specifically designed to generate anticoherent spin-j states at different orders. The protocol consists of cycles of a rotation pulse about an axis followed by a squeezing pulse in a perpendicular direction. To protect these states, we develop dynamical decoupling techniques using group-based sequence design and the dynamically corrected gate formalism. We analyze key sources of dephasing, disorder, and dipole-dipole interactions and assess the effectiveness of our methods in preserving coherence. Potential applications of the produced anticoherent spin states include quantum sensing and studies related to quantum entanglement.
Author comments upon resubmission
The attached file includes a detailed response to all reviewer comments, along with an updated version of the manuscript highlighting the changes made.
List of changes
Section 2 – Anticoherent Spin States - Introduced a definition of the multipolar tensor operators. - Added a brief explanation showing that the states presented in Eqs. (3) and (4) of the revised version are anticoherent to orders 1 and 2, respectively.
Section 3 – Protocol for Generating Anticoherent States -Removed the equation for the reduced density matrix (Eq. (5) in the first version) and revised the surrounding text accordingly. - Expanded the explanation of the operating principle behind the pulse-based generation protocol.
Section 4 – Decoherence and Mitigation Strategies - Added a comprehensive discussion of the main sources of dephasing in current experimental platforms—such as NV center ensembles and cold alkali-atom gases (Sec. 4.1)—identifying them as the primary sources of decoherence.
Section 5 – Robust Generation of Anticoherent States - Added a note clarifying the connection between the TEDD sequence discussed here and that in Ref. [92] of the revised version. - Included a comment on the importance of achieving very low infidelities (Sec. 5.2) and suggestions for improving the efficiency of the protection protocol. - Added a detailed analysis of control errors, accompanied by Figure 9.
Appendices and References - Updated Appendices C and D. - Added new references.
All revisions made to the manuscript are highlighted in red in the attached version.
Current status:
Editorial decision:
For Journal SciPost Physics Core: Publish
(status: Editorial decision fixed and (if required) accepted by authors)