Transport Properties and Amplification in a Majorana Teleportation Interferometer
ORAL
Abstract
Experimental searches for Majorana zero modes (MZMs) in hybrid superconductor–semiconductor nanowires using local conductance measurements have revealed the zero-energy bound states beyond the band-topological framework, making MZMs detection challenging [1]. Consequently, non-local measurements based on phenomena intrinsic to MZMs have gained attention.
This study focuses on teleportation interference mediated by non-local correlations in MZMs [2]. Realizing teleportation requires the fermion parity to be fixed via large charging energies, which has been challenging to treat in microscopic models of superconductor. Here we introduced a new computational method for parity-fixed topological superconductors. This clarified the tolerance of teleportation against perturbations such as potential inhomogeneities and impurities, confirming that teleportation interference is an effective detection method for MZMs [3]. Furthermore, by investigating transport properties in the system, we propose a scheme to amplify the parity signal. It is anticipated that this will facilitate high-precision parity readout.
[1] E. Prada et al., Nat Rev Phys 2, 575 (2020).
[2] L. Fu, Phys. Rev. Lett. 104, 056402 (2010).
[3] T. Goto et al., J. Phys. Soc. Jpn. 93, 063704 (2024).
This study focuses on teleportation interference mediated by non-local correlations in MZMs [2]. Realizing teleportation requires the fermion parity to be fixed via large charging energies, which has been challenging to treat in microscopic models of superconductor. Here we introduced a new computational method for parity-fixed topological superconductors. This clarified the tolerance of teleportation against perturbations such as potential inhomogeneities and impurities, confirming that teleportation interference is an effective detection method for MZMs [3]. Furthermore, by investigating transport properties in the system, we propose a scheme to amplify the parity signal. It is anticipated that this will facilitate high-precision parity readout.
[1] E. Prada et al., Nat Rev Phys 2, 575 (2020).
[2] L. Fu, Phys. Rev. Lett. 104, 056402 (2010).
[3] T. Goto et al., J. Phys. Soc. Jpn. 93, 063704 (2024).
*This work was supported by JST SPRING, Grant Number JPMJSP2138.
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Publication: T. Goto et al., J. Phys. Soc. Jpn. 93, 063704 (2024).
Presenters
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Tsukasa Goto
- Osaka University