Universal Majorana thermoelectric noise

Abstract

Thermoelectric phenomena resulting from an interplay between particle flows induced by electric fields and temperature inhomogeneities are extremely insightful as a tool providing substantial knowledge about the microscopic structure of a given system. Tuning, e.g., parameters of a nanoscopic system coupled via tunneling mechanisms to two contacts one may achieve various situations where the electric current induced by an external bias voltage competes with the electric current excited by the temperature difference of the two contacts. Even more exciting physics emerges when the system's electronic degrees freedom split to form Majorana fermions which make the thermoelectric dynamics universal. Here we propose revealing this unique universal signatures of Majorana fermions in strongly nonequilibrium quantum dots via noise of the thermoelectric transport beyond linear response. It is demonstrated that whereas mean thermoelectric quantities are only universal at large bias voltages, the noise of the electric current excited by an external bias voltage and the temperature difference of the contacts is universal at any bias voltage. We provide truly universal, i.e. independent of the system's parameters, thermoelectric ratios between nonlinear response coefficients of the noise and mean current at large bias voltages where experiments may easily be performed to uniquely detect these truly universal Majorana thermoelectric signatures.

15 pages, 9 figures

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Cited by in corpus (19)

• Weak measurement protocols for Majorana bound state identification
• Spin-resolved thermal signatures of Majorana-Kondo interplay in double quantum dots
• Gate voltage controlled thermoelectric figure of merit in three-dimensional topological insulator nanowires
• Majorana finite frequency nonequilibrium quantum noise
• Dynamic Majorana resonances and universal symmetry of nonequilibrium thermoelectric quantum noise
• Majorana entropy revival via tunneling phases
• Majorana ensembles with fractional entropy and conductance in nanoscopic systems
• Majorana bound states in a superconducting Rashba nanowire in the presence of antiferromagnetic order
• Majorana differential shot noise and its universal thermoelectric crossover
• Dual Majorana universality in thermally induced nonequilibrium
• Nonequilibrium electrical, thermal and spin transport in open quantum systems of topological superconductors, semiconductors and metals
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• AC Measurement of the Nernst effect of thin films at low temperatures
• Pumped heat and charge statistics from Majorana braiding
• Thermoelectric fluctuations of interfering Majorana bound states
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• Fluctuation response of a minimal Kitaev chain in nonequilibrium states
• Revealing universal Majorana fractionalization using differential shot noise and conductance in nonequilibrium states controlled by tunneling phases