DOAJ Open Access 2024

Transport signatures of phase fluctuations in superconducting qubits

M Wisne Y Deng H Cansizoglu C Kopas J Y Mutus +1 lainnya

Abstrak

Josephson junctions supply the nonlinear inductance element in superconducting qubits. In the widely used transmon configuration, where the junction is shunted by a large capacitor, the low charging energy minimizes the sensitivity of the qubit to charge noise while maintaining the necessary anharmonicity to qubit states. We report here low-frequency transport measurements on small standalone junctions and identically fabricated capacitively-shunted junctions that show two distinct features normally attributed to small capacitance junctions near zero bias: reduced switching currents and prominent finite resistance associated with phase diffusion in the current–voltage characteristic. Our transport data reveals the existence of phase fluctuations in transmons arising from intrinsic junction capacitance.

Topik & Kata Kunci

Atomic physics. Constitution and properties of matter Materials of engineering and construction. Mechanics of materials

Penulis (6)

M Wisne

Y Deng

H Cansizoglu

C Kopas

J Y Mutus

V Chandrasekhar

Format Sitasi

APA MLA BibTeX

Wisne, M., Deng, Y., Cansizoglu, H., Kopas, C., Mutus, J.Y., Chandrasekhar, V. (2024). Transport signatures of phase fluctuations in superconducting qubits. https://doi.org/10.1088/2633-4356/ad9a47

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Informasi Jurnal

Tahun Terbit: 2024
Sumber Database: DOAJ
DOI: 10.1088/2633-4356/ad9a47
Akses: Open Access ✓