Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors

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Time-reversal-invariant topological superconducting (TRITOPS) wires are known to host a fractional spin /4 at their ends. We investigate how this fractional spin affects the Josephson current in a TRITOPS-quantum dot-TRITOPS Josephson junction, describing the wire in a model that can be tuned betwee...

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Autores principales: Camjayi, A., Arrachea, L., Aligia, A., Von Oppen, F.
Formato: JOUR
Materias:
Josephson junction devices
Monte Carlo methods
Quantum optics
Semiconductor quantum dots
Superconducting materials
Continuous-time
Fractional spin
Josephson current
Josephson effect
Josephson-junction
Quantum dot spins
Spin singlets
Topological phase
Topology
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00319007_v119_n4_p_Camjayi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00319007_v119_n4_p_Camjayi
record_format dspace
spelling todo:paper_00319007_v119_n4_p_Camjayi2023-10-03T14:42:46Z Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors Camjayi, A. Arrachea, L. Aligia, A. Von Oppen, F. Josephson junction devices Monte Carlo methods Quantum optics Semiconductor quantum dots Superconducting materials Continuous-time Fractional spin Josephson current Josephson effect Josephson-junction Quantum dot spins Spin singlets Topological phase Topology Time-reversal-invariant topological superconducting (TRITOPS) wires are known to host a fractional spin /4 at their ends. We investigate how this fractional spin affects the Josephson current in a TRITOPS-quantum dot-TRITOPS Josephson junction, describing the wire in a model that can be tuned between a topological and a nontopological phase. We compute the equilibrium Josephson current of the full model by continuous-time Monte Carlo simulations and interpret the results within an effective low-energy theory. We show that in the topological phase, the 0-to-π transition is quenched via formation of a spin singlet from the quantum-dot spin and the fractional spins associated with the two adjacent topological superconductors. © 2017 American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00319007_v119_n4_p_Camjayi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Josephson junction devices
Monte Carlo methods
Quantum optics
Semiconductor quantum dots
Superconducting materials
Continuous-time
Fractional spin
Josephson current
Josephson effect
Josephson-junction
Quantum dot spins
Spin singlets
Topological phase
Topology
spellingShingle Josephson junction devices
Monte Carlo methods
Quantum optics
Semiconductor quantum dots
Superconducting materials
Continuous-time
Fractional spin
Josephson current
Josephson effect
Josephson-junction
Quantum dot spins
Spin singlets
Topological phase
Topology
Camjayi, A.
Arrachea, L.
Aligia, A.
Von Oppen, F.
Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors
topic_facet Josephson junction devices
Monte Carlo methods
Quantum optics
Semiconductor quantum dots
Superconducting materials
Continuous-time
Fractional spin
Josephson current
Josephson effect
Josephson-junction
Quantum dot spins
Spin singlets
Topological phase
Topology
description Time-reversal-invariant topological superconducting (TRITOPS) wires are known to host a fractional spin /4 at their ends. We investigate how this fractional spin affects the Josephson current in a TRITOPS-quantum dot-TRITOPS Josephson junction, describing the wire in a model that can be tuned between a topological and a nontopological phase. We compute the equilibrium Josephson current of the full model by continuous-time Monte Carlo simulations and interpret the results within an effective low-energy theory. We show that in the topological phase, the 0-to-π transition is quenched via formation of a spin singlet from the quantum-dot spin and the fractional spins associated with the two adjacent topological superconductors. © 2017 American Physical Society.
format JOUR
author Camjayi, A.
Arrachea, L.
Aligia, A.
Von Oppen, F.
author_facet Camjayi, A.
Arrachea, L.
Aligia, A.
Von Oppen, F.
author_sort Camjayi, A.
title Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors
title_short Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors
title_full Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors
title_fullStr Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors
title_full_unstemmed Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors
title_sort fractional spin and josephson effect in time-reversal-invariant topological superconductors
url http://hdl.handle.net/20.500.12110/paper_00319007_v119_n4_p_Camjayi
work_keys_str_mv AT camjayia fractionalspinandjosephsoneffectintimereversalinvarianttopologicalsuperconductors
AT arracheal fractionalspinandjosephsoneffectintimereversalinvarianttopologicalsuperconductors
AT aligiaa fractionalspinandjosephsoneffectintimereversalinvarianttopologicalsuperconductors
AT vonoppenf fractionalspinandjosephsoneffectintimereversalinvarianttopologicalsuperconductors
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