Spin Lifetime and Charge Noise in Hot Silicon Quantum Dot Qubits

Physical Review Letters
L PetitM Veldhorst

Abstract

We investigate the magnetic field and temperature dependence of the single-electron spin lifetime in silicon quantum dots and find a lifetime of 2.8 ms at a temperature of 1.1 K. We develop a model based on spin-valley mixing and find that Johnson noise and two-phonon processes limit relaxation at low and high temperature, respectively. We also investigate the effect of temperature on charge noise and find a linear dependence up to 4 K. These results contribute to the understanding of relaxation in silicon quantum dots and are promising for qubit operation at elevated temperatures.

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Oct 6, 2015·Nature·M VeldhorstA S Dzurak
Nov 26, 2015·Science Advances·Arne LauchtAndrea Morello
Dec 9, 2017·Science·D M ZajacJ R Petta
Dec 16, 2017·Nature Communications·M VeldhorstA S Dzurak
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Jul 10, 2018·Science Advances·Ruoyu LiMenno Veldhorst

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Citations

Aug 25, 2020·Advanced Materials·Ludwik KranzMichelle Yvonne Simmons
Jul 9, 2020·Physical Review Letters·Xin ZhangGuo-Ping Guo
Apr 17, 2020·Nature·L PetitM Veldhorst
May 16, 2019·Nature Nanotechnology·Matias UrdampilletaTristan Meunier
May 18, 2021·Nano Letters·Jonathan Yue HuangArne Laucht

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