Measurement of Quasiparticle Diffusion in a Superconducting Transmon Qubit

Quasiparticles, especially the ones near the Josephson junctions in the superconducting qubits, are known as an important source of decoherence. By injecting quasiparticles into a quantum chip, we characterized the diffusion feature by measuring the energy relaxation time and the residual excited-st...

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التفاصيل البيبلوغرافية
الحاوية / القاعدة:Applied Sciences
المؤلفون الرئيسيون: Yuqian Dong, Yong Li, Wen Zheng, Yu Zhang, Zhuang Ma, Xinsheng Tan, Yang Yu
التنسيق: مقال
اللغة:الإنجليزية
منشور في: MDPI AG 2022-08-01
الموضوعات:
superconducting qubit
quasiparticles
transmon
الوصول للمادة أونلاين:https://www.mdpi.com/2076-3417/12/17/8461
الوصف
الملخص:Quasiparticles, especially the ones near the Josephson junctions in the superconducting qubits, are known as an important source of decoherence. By injecting quasiparticles into a quantum chip, we characterized the diffusion feature by measuring the energy relaxation time and the residual excited-state population of a transmon qubit. From the extracted transition rates, we phenomenologically modeled the quasiparticle diffusion in a superconducting circuit that contained “hot” nonequilibrium quasiparticles in addition to low-energy ones.
تدمد:2076-3417

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