Minimal quantum dot based Kitaev chain with only local superconducting proximity effect
Samuelson, William LU
; Svensson, Viktor
LU
and Leijnse, Martin
LU
(2024)
In Physical Review B
109(3).
- Abstract
- The possibility to engineer a Kitaev chain in quantum dots coupled via superconductors has recently emerged
as a promising path toward topological superconductivity and possibly non-Abelian physics. Here we show that
it is possible to avoid some of the main experimental hurdles on this path by using only local proximity effect
on each quantum dot in a geometry that resembles a two-dot version of the proposal in Fulga et al. [New J.
Phys. 15, 045020 (2013)]. There is no need for narrow superconducting couplers, additional Andreev bound
states, or spatially varying magnetic fields; it suffices with spin-orbit interaction and a constant magnetic field
in combination with control of the superconducting phase to tune the... (More) - The possibility to engineer a Kitaev chain in quantum dots coupled via superconductors has recently emerged
as a promising path toward topological superconductivity and possibly non-Abelian physics. Here we show that
it is possible to avoid some of the main experimental hurdles on this path by using only local proximity effect
on each quantum dot in a geometry that resembles a two-dot version of the proposal in Fulga et al. [New J.
Phys. 15, 045020 (2013)]. There is no need for narrow superconducting couplers, additional Andreev bound
states, or spatially varying magnetic fields; it suffices with spin-orbit interaction and a constant magnetic field
in combination with control of the superconducting phase to tune the relative strengths of elastic cotunneling
and an effective crossed-Andreev-reflection-like process generated by higher-order tunneling. We use a realistic
spinful, interacting model and show that high-quality Majorana bound states can be generated already in a double
quantum dot. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/82aa25f5-1587-4ce3-8271-62250aac213d
- author
- Samuelson, William
LU
; Svensson, Viktor
LU
and Leijnse, Martin
LU
- organization
- publishing date
- 2024-01-12
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 109
- issue
- 3
- article number
- 035415
- publisher
- American Physical Society
- external identifiers
-
- scopus:85182393620
- ISSN
- 2469-9950
- DOI
- 10.1103/PhysRevB.109.035415
- language
- English
- LU publication?
- yes
- id
- 82aa25f5-1587-4ce3-8271-62250aac213d
- alternative location
- https://link.aps.org/doi/10.1103/PhysRevB.109.035415
- date added to LUP
- 2024-01-16 10:20:36
- date last changed
- 2024-02-23 11:19:37
@article{82aa25f5-1587-4ce3-8271-62250aac213d,
abstract = {{The possibility to engineer a Kitaev chain in quantum dots coupled via superconductors has recently emerged<br>
as a promising path toward topological superconductivity and possibly non-Abelian physics. Here we show that<br>
it is possible to avoid some of the main experimental hurdles on this path by using only local proximity effect<br>
on each quantum dot in a geometry that resembles a two-dot version of the proposal in Fulga et al. [New J.<br>
Phys. 15, 045020 (2013)]. There is no need for narrow superconducting couplers, additional Andreev bound<br>
states, or spatially varying magnetic fields; it suffices with spin-orbit interaction and a constant magnetic field<br>
in combination with control of the superconducting phase to tune the relative strengths of elastic cotunneling<br>
and an effective crossed-Andreev-reflection-like process generated by higher-order tunneling. We use a realistic<br>
spinful, interacting model and show that high-quality Majorana bound states can be generated already in a double<br>
quantum dot.}},
author = {{Samuelson, William and Svensson, Viktor and Leijnse, Martin}},
issn = {{2469-9950}},
language = {{eng}},
month = {{01}},
number = {{3}},
publisher = {{American Physical Society}},
series = {{Physical Review B}},
title = {{Minimal quantum dot based Kitaev chain with only local superconducting proximity effect}},
url = {{http://dx.doi.org/10.1103/PhysRevB.109.035415}},
doi = {{10.1103/PhysRevB.109.035415}},
volume = {{109}},
year = {{2024}},
}