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Superconducting qubits already demonstrated potential in emulating coherentback scattering or weak localization (WL) and tunnelling phenomena however, ina real multipath system they have not been verified yet.Here we show how adouble-path system can be emulated by a quantum device through construction ofmultiple scattering centers in closed paths (detune boxes) and tunnel barrierswith a large return probability (Pr) of electrons. Incorporation of sucharrangements of tunnel barriers can add an extra geometric phase anddemonstrate Aharonov-Bohm type oscillations (phi)0 and (phi/2)0 in a ring and atube, respectively. A combination of inter and intra layer tunnelling in adouble-path circuit creates a phase reversal and subsequently weakanti-localization (WAL) effect with a long coherence time. Finally, angledependence of Pr firmly establishes stability of the two-path circuit which isalso associated with a phase reversal due to the inter-path resonance.

Emulating coherent backscattering in multipath tunnel systems on a near-term Quantum computer