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Phase transitions in quantum dot-Majorana zero mode coupling systems
by Yue Mao, Qing-Feng Sun
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Yue Mao |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202406_00024v3 (pdf) |
| Date accepted: | 2025-02-26 |
| Date submitted: | 2025-02-03 13:18 |
| Submitted by: | Mao, Yue |
| Submitted to: | SciPost Physics Core |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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Abstract
The magnetic doublet ground state (GS) of a quantum dot (QD) could be changed to a spin-singlet GS by coupling to a superconductor. In analogy, here we study the GS phase transitions in QD-Majorana zero mode (MZM) coupling systems: GS behaves phase transition versus intra-dot energy level and QD-MZM coupling strength. The phase diagrams of GS are obtained, for cases with and without Zeeman term. Along with the phase transition, we also study the change of spin feature and density of states. The properties of the phase transition are understood via a mean-field picture. Our study not only serves as an analogue to QD-superconductor phase transitions, but also gives alternative explanations on MZM-relevant experiments.
Author comments upon resubmission
List of changes
- We revise the language problems, including spelling, grammar, and expressions.
The changes are marked as red color in the manuscript.
Published as SciPost Phys. Core 8, 031 (2025)