Phase-controlled minimal Kitaev chain in multiterminal Josephson junctions
Samuel D. Escribano, Anders Enevold Dahl, Karsten Flensberg, Yuval Oreg
DOI 10.1103/PhysRevB.111.195433 · Physical Review B
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Abstract
We propose a nanodevice based on multiterminal Josephson junctions for the creation and detection of poor man's Majorana (PMM) modes. The device consists of a double three-terminal Josephson junction (3TJJ) embedded in a planar semiconductor that engineers a two-site Kitaev chain. We identify the conditions necessary for the emergence of PMM modes by precisely tuning the superconducting phases of the terminals and the interjunction coupling between the 3TJJs. To validate our findings, we perform numerical simulations that account for disorder in a more general geometry and test experimentally feasible protocols based on conductance measurements to reliably detect these modes. Unlike traditional approaches that rely on magnetic fields, our design eliminates the need for such fields, potentially increasing the energy-level resolution and significantly expanding the range of compatible semiconductor materials, such as Ge-based heterostructures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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