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Trainmon: a framework for reverse engineering potentials in superconducting Qubits
by Saeed Hajihosseini, Seyed Iman Mirzaei, Hesam Zandi, Mohsen Akbari
Submission summary
| Authors (as registered SciPost users): | Saeed Hajihosseini |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202512_00007v1 (pdf) |
| Date submitted: | Dec. 2, 2025, 5:42 p.m. |
| Submitted by: | Saeed Hajihosseini |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
A framework named Trainmon is introduced to reverse-engineer a quantum potential well in superconducting qubits. Trainmon consists of parallel branches of identical Josephson junctions. The Hamiltonian for this circuit resembles a discrete cosine transform, which can be applied to mimic various potentials. This framework is applied to well-known qubit potentials such as Quarton and Fluxonium in a well-behaved range, and their Hamiltonians are extracted and solved to validate the transition frequencies and calculate the coherence times of both the original qubits and their Trainmon-based versions.
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:
In refereeing