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Intermediate states in Andreev bound state fusion
- Source :
- Communications Physics, Vol 6, Iss 1, Pp 1-6 (2023)
- Publication Year :
- 2023
- Publisher :
- Nature Portfolio, 2023.
-
Abstract
- Abstract Hybridization is one of the most fundamental quantum mechanical phenomena, with the text book example of binding two hydrogen atoms in a hydrogen molecule. Here we report tunnel spectroscopy experiments illustrating the hybridization of another type of discrete quantum states, namely of superconducting subgap states that form in segments of a semiconducting nanowire in contact with superconducting reservoirs. We discuss a collection of intermediate states with unique (tunnel) spectroscopic fingerprints in the process of merging well-known individual bound states, hybridized by a central quantum dot and eventually coherently linking the reservoirs, carrying a Josephson current. These coupled and fused Andreev bound states can be seen as superconducting analogues to atomic and molecular single electron states in nature, and explain a variety of recent bound state spectra, with specific fingerprints that will have to be winnowed in future Majorana fusion experiments.
- Subjects :
- Astrophysics
QB460-466
Physics
QC1-999
Subjects
Details
- Language :
- English
- ISSN :
- 23993650
- Volume :
- 6
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Communications Physics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.0e93cf69d9bd4324aeae643631b619a5
- Document Type :
- article
- Full Text :
- https://doi.org/10.1038/s42005-023-01273-2