Minimal model of an artificial topological material realized in a two-terminal Josephson junction threaded by Aharonov-Casher fluxes

Medic, Luka (avtor), Ramšak, Anton (avtor), Rejec, Tomaž (avtor)

We investigate a minimal model of a two-terminal Josephson junction with conventional superconducting (SC) leads and a pair of interconnected quantum dots in the presence of two Aharonov-Casher (AC) fluxes. The Andreev bound-state spectrum features Weyl nodes within a three-dimensional synthetic Brillouin zone defined in the space of these AC fluxes and the SC phase difference. The aim is to determine the location and topological charge of these nodes by probing the Berry curvature on closed surfaces that may enclose them. This is achieved by adiabatically varying the superconducting phase difference and AC fluxes along a path on these surfaces and measuring the associated currents. We define the kinematic curvature as the cross product of a tangent vector along the path and the vector of these currents. In the adiabatic regime, the path-averaged kinematic curvature provides a quantized response equal to the topological charge enclosed by the surface, provided the path uniformly and densely covers it.

• Jezik: Angleški jezik
• Ključne besede: Andreev bound states, Josephson effect, mesoscopics, topological phases of matter, S-matrix method in transport
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: Str. 245424-1-245424-6
• Številčenje: Vol. 112, iss. 24
• PID: 20.500.12556/RUL-177729
• UDK: 538.9
• ISSN pri članku: 2469-9950
• DOI: 10.1103/mqt7-qzwc
• COBISS.SI-ID: 263440899
• Datum objave v RUL: 05.01.2026

Gradivo je del revije

• Naslov: Physical review
• Založnik: American Physical Society
• ISSN: 2469-9950
• COBISS.SI-ID: 2997348

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: vezana stanja Andreeva, Josephsonov pojav, topološe faze snovi

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P1-0044
• Naslov: Teorija trdnih snovi in statistična fizika

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: Univerza v Ljubljani
• Številka projekta: SN-ZRD/22-27/0510
• Naslov: Kvantne tehnologije za transport in komunikacije v 21. stoletju
• Akronim: KTTK21