Geometric Inductor Breaks Resistance Quantum “Limit”


A geometric superinductor made of a tightly wound aluminum wire can achieve an impedance about 5 times larger than a hypothesized fundamental limit. [1]

In superconducting circuits, superinductors are employed to suppress charge fluctuations and increase zero-point voltage, enabling features for hardware-protected qubits, metrological standards, and strongly coupled hybrid devices. Conventionally these devices are based on kinetic inductance, and can suffer from nonlinearity, additional complexity due to multiterminal structure, and the limited control and reliability of bottom-up fabrication. Making use of miniaturization and substrate engineering, the authors realize a geometrically defined, single-wavefunction superinductor—a high-performance, innovative circuit element that promises to expand the scope of quantum circuitry.

[1] Geometric Inductor Breaks Resistance Quantum “Limit” Physics 13, 141 (2020)

[2] Surpassing the resistance quantum with a geometric superinductor, M. Peruzzo*, A. Trioni*, F. Hassani, M. Zemlicka, J. M. Fink, Phys. Rev. Applied 14, 044055 (2020)



M. Peruzzo et al.