Replacing bulky superconducting magnets with a room-temperature permanent magnet reclaims the cryogenic space necessary for the control circuitry required to scale quantum processors. Here, the authors report a configuration that maintains high performance in germanium spin qubits with coherence times of \({T}_{2}^{* } = 31\,\upmu {{{\rm{s}}}}\) and \({T}_{2}^{{{{\rm{H}}}}} = 252 \,\upmu {{{\rm{s}}}}\).
- Cécile X. Yu
- Barnaby van Straaten
- Menno Veldhorst
