Magnetic-Field-Compatible Superconducting Transmon Qubit

We present a hybrid semiconductor-based superconducting qubit device that remains coherent at magnetic fields up to 1 T. The qubit transition frequency exhibits periodic oscillations with the magnetic field, consistent with interference effects due to the magnetic flux threading the cross section of the proximitized semiconductor nanowire junction. As the induced superconductivity revives, additional coherent modes emerge at high magnetic fields, which we attribute to the interaction of the qubit and low-energy Andreev states.

Automated summary

The study introduces a novel hybrid semiconductor-based superconducting qubit device that maintains coherence at high magnetic fields up to 1 Tesla. The qubit transition frequency shows periodic oscillations with the magnetic field, indicating interference effects due to magnetic flux threading the proximitized semiconductor nanowire junction. With the revival of induced superconductivity, additional coherent modes emerge at high magnetic fields, attributed to the interaction between the qubit and low-energy Andreev states.