Measuring and Suppressing Quantum State Leakage in a Superconducting Qubit

Physical Review Letters
Zijun ChenJohn M Martinis

Abstract

Leakage errors occur when a quantum system leaves the two-level qubit subspace. Reducing these errors is critically important for quantum error correction to be viable. To quantify leakage errors, we use randomized benchmarking in conjunction with measurement of the leakage population. We characterize single qubit gates in a superconducting qubit, and by refining our use of derivative reduction by adiabatic gate pulse shaping along with detuning of the pulses, we obtain gate errors consistently below 10^{-3} and leakage rates at the 10^{-5} level. With the control optimized, we find that a significant portion of the remaining leakage is due to incoherent heating of the qubit.

References

Aug 11, 2005·Physical Review Letters·A WallraffR J Schoelkopf
Jun 20, 2008·Nature·John Clarke, Frank K Wilhelm
Jul 23, 2008·Physical Review Letters·Erik LuceroJohn M Martinis
Oct 2, 2009·Physical Review Letters·F MotzoiF K Wilhelm
Jun 4, 2011·Physical Review Letters·Easwar MagesanJoseph Emerson
Sep 10, 2013·Physical Review Letters·R BarendsJohn M Martinis
Jun 1, 2014·Physical Review Letters·Evan JeffreyJohn M Martinis
Jul 6, 2014·Physical Review Letters·J KellyJohn M Martinis
Jan 25, 2013·Physical Review Letters·Simon GustavssonWilliam D Oliver
Jan 24, 2015·Physical Review Letters·Michael J PetererSimon Gustavsson
Jul 22, 2015·Physical Review Letters·X Y JinW D Oliver
Aug 22, 2015·Physical Review Letters·Joel J WallmanJoseph Emerson

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Citations

Oct 27, 2016·Scientific Reports·Daoyi DongFranco Nori
Dec 9, 2017·Physical Review Letters·Chao SongJian-Wei Pan
Jul 7, 2017·Reports on Progress in Physics·G Wendin
Jan 18, 2018·Physical Review Letters·Timothy ProctorRobin Blume-Kohout
May 28, 2016·Science·Chen WangR J Schoelkopf
Oct 28, 2019·Nature·Frank AruteJohn M Martinis
Apr 15, 2017·Physical Review Letters·V V RamaseshN Y Yao
May 15, 2018·Physical Review Letters·Shai MachnesFrank K Wilhelm
Aug 7, 2019·Physical Review Letters·Timothy J ProctorKevin Young
Jul 9, 2020·Physical Review Letters·Anatoly KulikovArkady Fedorov
Dec 7, 2019·Physical Review Letters·R BarendsJohn M Martinis
Oct 6, 2020·Physical Review Letters·B FoxenUNKNOWN Google AI Quantum
Mar 17, 2019·Optics Express·Hanlae JoJaewook Ahn
Jan 8, 2021·Physical Review Letters·Michele C CollodoChristopher Eichler
Jun 12, 2021·Physical Review Letters·A MorvanI Siddiqi
Jun 26, 2021·Physical Review Letters·Adam WinickJoseph Emerson

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