Quantum Dot Parity Effects in Trivial and Topological Josephson Junctions

被引：40

作者：

Razmadze, D. ^{[1
,2
]}

O'Farrell, E. C. T. ^{[1
,2
]}

Krogstrup, P. ^{[1
,3
]}

Marcus, C. M. ^{[1
,2
]}

机构：

[1] Univ Copenhagen, Ctr Quantum Devices, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[2] Microsoft Quantum Lab Copenhagen, DK-2100 Copenhagen, Denmark

[3] Microsoft Quantum Mat Lab Copenhagen, DK-2800 Lyngby, Denmark

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

TRANSITION;

D O I：

10.1103/PhysRevLett.125.116803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An odd-occupied quantum dot in a Josephson junction can flip transmission phase, creating a pi junction. When the junction couples topological superconductors, no phase flip is expected. We investigate this and related effects in a full-shell hybrid interferometer, using gate voltage to control dot-junction parity and axial magnetic flux to control the transition from trivial to topological superconductivity. Enhanced zero-bias conductance and critical current for odd parity in the topological phase reflects hybridisation of the confined spin with zero-energy modes in the leads.

引用

收藏

页数：6

相关论文

共 52 条

[1] Milestones Toward Majorana-Based Quantum Computing [J].

Aasen, David ;

Hell, Michael ;

Mishmash, Ryan V. ;

Higginbotham, Andrew ;

Danon, Jeroen ;

Leijnse, Martin ;

Jespersen, Thomas S. ;

Folk, Joshua A. ;

Marcus, Charles M. ;

Flensberg, Karsten ;

Alicea, Jason .

PHYSICAL REVIEW X, 2016, 6 (03)

[2] Non-Abelian statistics and topological quantum information processing in 1D wire networks [J].

Alicea, Jason ;

Oreg, Yuval ;

Refael, Gil ;

von Oppen, Felix ;

Fisher, Matthew P. A. .

NATURE PHYSICS, 2011, 7 (05) :412-417

[3] Hybrid quantum dot-superconducting systems: Josephson current and Kondo effect in the narrow-band limit [J].

Allub, R. ;

Proetto, C. R. .

PHYSICAL REVIEW B, 2015, 91 (04)

[4] Supercurrent Detection of Topologically Trivial Zero-Energy States in Nanowire Junctions [J].

Awoga, Oladunjoye A. ;

Cayao, Jorge ;

Black-Schaffer, Annica M. .

PHYSICAL REVIEW LETTERS, 2019, 123 (11)

[5] Quantum dot in the Kondo regime coupled to superconductors -: art. no. 256801 [J].

Buitelaar, MR ;

Nussbaumer, T ;

Schönenberger, C .

PHYSICAL REVIEW LETTERS, 2002, 89 (25)

[6] Kondo universal scaling for a quantum dot coupled to superconducting leads [J].

Buizert, C. ;

Oiwa, A. ;

Shibata, K. ;

Hirakawa, K. ;

Tarucha, S. .

PHYSICAL REVIEW LETTERS, 2007, 99 (13)

[7] Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors [J].

Camjayi, Alberto ;

Arrachea, Liliana ;

Aligia, Armando ;

von Oppen, Felix .

PHYSICAL REVIEW LETTERS, 2017, 119 (04)

[8] SNS junctions in nanowires with spin-orbit coupling: Role of confinement and helicity on the subgap spectrum [J].

Cayao, Jorge ;

Prada, Elsa ;

San-Jose, Pablo ;

Aguado, Ramon .

PHYSICAL REVIEW B, 2015, 91 (02)

[9] Tunneling Spectroscopy of Quasiparticle Bound States in a Spinful Josephson Junction [J].

Chang, W. ;

Manucharyan, V. E. ;

Jespersen, T. S. ;

Nygard, J. ;

Marcus, C. M. .

PHYSICAL REVIEW LETTERS, 2013, 110 (21)

[10] Interplay between Kondo and Majorana Interactions in Quantum Dots [J].

Cheng, Meng ;

Becker, Michael ;

Bauer, Bela ;

Lutchyn, Roman M. .

PHYSICAL REVIEW X, 2014, 4 (03)

← 1 2 3 4 5 6 →