Evidence for spin-polarized bound states in semiconductor-superconductor-ferromagnetic insulator islands

Vaitiekėnas, S.; Souto, R. Seoane; Liu, Y.; Krogstrup, P.; Flensberg, K.; Leijnse, M.; Marcus, C. M.

doi:10.48550/arxiv.2104.01463

Cited by 2 publications

(2 citation statements)

References 40 publications

(51 reference statements)

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“…The rich physics of coherent dynamics resulting from the interplay of the two channels can help to confirm the MZMs beyond the zero-bias-peak of conductance. The present study is also expected to stimulate further study of Majorana island in the presence of finite E C , which has been commonly assumed in contexts such as Majorana qubit construction, manipulation, and measurement [9,[41][42][43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 83%

Cross correlation mediated by Majorana island with finite charging energy

Feng

Qin²,

Li³

2021

New J. Phys.

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Based on the many-particle-number-state treatment for transport through a pair of Majorana zero modes (MZMs) which are coupled to the leads via two quantum dots, we identify that the reason for zero cross correlation of currents at uncoupling limit between the MZMs is from a degeneracy of the teleportation and the Andreev process channels. We then propose a scheme to eliminate the degeneracy by introducing finite charging energy on the Majorana island which allows for coexistence of the two channels. We find nonzero cross correlation established even in the Majorana uncoupling limit (and also in the small charging energy limit), which demonstrates well the teleportation or nonlocal nature of the MZMs. More specifically, the characteristic structure of coherent peaks in the power spectrum of the cross correlation is analyzed to identify the nonlocal and coherent coupling mechanism between the MZMs and the quantum dots. We also display the behaviors of peak shift with variation of the Majorana coupling energy, which can be realized by modulating parameters such as the magnetic field.

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Section: Introductionmentioning

confidence: 83%

Cross correlation mediated by Majorana island with finite charging energy

Feng

Qin²,

Li³

2021

New J. Phys.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 83%

Cross-correlation mediated by Majorana island with finite charging energy

Feng,

Qin,

2021

Preprint

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Based on the many-particle-number-state treatment for transport through a pair of Majorana zero modes (MZMs) which are coupled to the leads via two quantum dots, we identify that the reason for zero cross correlation of currents at uncoupling limit between the MZMs is from a degeneracy of the teleportation and the Andreev process channels. We then propose a scheme to eliminate the degeneracy by introducing finite charging energy on the Majorana island which allows for coexistence of the two channels. We find nonzero cross correlation established even in the Majorana uncoupling limit, which demonstrates well the nonlocal nature of the MZMs. More specifically, the characteristic structure of coherent peaks in the power spectrum of the cross correlation is analyzed to identify the nonlocal and coherent coupling mechanism between the MZMs and the quantum dots. We also display the behaviors of peak shift with variation of the Majorana coupling energy, which can be realized by modulating parameters such as the magnetic field.

show abstract

Evidence for spin-polarized bound states in semiconductor-superconductor-ferromagnetic insulator islands

Cited by 2 publications

References 40 publications

Cross correlation mediated by Majorana island with finite charging energy

Cross correlation mediated by Majorana island with finite charging energy

Cross-correlation mediated by Majorana island with finite charging energy

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