Vibration-induced electrical noise in a cryogen-free dilution refrigerator: Characterization, mitigation, and impact on qubit coherence.

Kalra, R; Laucht, A; Dehollain, JP; Bar, D; Freer, S; Simmons, S; Muhonen, JT; Morello, A

Vibration-induced electrical noise in a cryogen-free dilution refrigerator: Characterization, mitigation, and impact on qubit coherence.

Kalra, R Laucht, A Dehollain, JP Bar, D Freer, S Simmons, S Muhonen, JT Morello, A

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Publisher:: AMER INST PHYSICS
Publication Type:: Journal Article
Citation:: Rev Sci Instrum, 2016, 87, (7), pp. 073905
Issue Date:: 2016-07

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Field	Value	Language
dc.contributor.author	Kalra, R
dc.contributor.author	Laucht, A
dc.contributor.author	Dehollain, JP
dc.contributor.author	Bar, D
dc.contributor.author	Freer, S
dc.contributor.author	Simmons, S
dc.contributor.author	Muhonen, JT
dc.contributor.author	Morello, A
dc.date.accessioned	2022-08-10T22:45:32Z
dc.date.available	2022-08-10T22:45:32Z
dc.date.issued	2016-07
dc.identifier.citation	Rev Sci Instrum, 2016, 87, (7), pp. 073905
dc.identifier.issn	0034-6748
dc.identifier.issn	1089-7623
dc.identifier.uri	http://hdl.handle.net/10453/159864
dc.description.abstract	Cryogen-free low-temperature setups are becoming more prominent in experimental science due to their convenience and reliability, and concern about the increasing scarcity of helium as a natural resource. Despite not having any moving parts at the cold end, pulse tube cryocoolers introduce vibrations that can be detrimental to the experiments. We characterize the coupling of these vibrations to the electrical signal observed on cables installed in a cryogen-free dilution refrigerator. The dominant electrical noise is in the 5-10 kHz range and its magnitude is found to be strongly temperature dependent. We test the performance of different cables designed to diagnose and tackle the noise, and find triboelectrics to be the dominant mechanism coupling the vibrations to the electrical signal. Flattening a semi-rigid cable or jacketing a flexible cable in order to restrict movement within the cable, successfully reduces the noise level by over an order of magnitude. Furthermore, we characterize the effect of the pulse tube vibrations on an electron spin qubit device in this setup. Coherence measurements are used to map out the spectrum of the noise experienced by the qubit, revealing spectral components matching the spectral signature of the pulse tube.
dc.format	Print
dc.language	eng
dc.publisher	AMER INST PHYSICS
dc.relation.ispartof	Rev Sci Instrum
dc.relation.isbasedon	10.1063/1.4959153
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 03 Chemical Sciences, 09 Engineering
dc.subject.classification	Applied Physics
dc.title	Vibration-induced electrical noise in a cryogen-free dilution refrigerator: Characterization, mitigation, and impact on qubit coherence.
dc.type	Journal Article
utslib.citation.volume	87
utslib.location.activity	United States
utslib.for	02 Physical Sciences
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - QSI - Centre for Quantum Software and Information
utslib.copyright.status	closed_access	*
dc.date.updated	2022-08-10T22:45:29Z
pubs.issue	7
pubs.publication-status	Published
pubs.volume	87
utslib.citation.issue	7

Abstract:

Cryogen-free low-temperature setups are becoming more prominent in experimental science due to their convenience and reliability, and concern about the increasing scarcity of helium as a natural resource. Despite not having any moving parts at the cold end, pulse tube cryocoolers introduce vibrations that can be detrimental to the experiments. We characterize the coupling of these vibrations to the electrical signal observed on cables installed in a cryogen-free dilution refrigerator. The dominant electrical noise is in the 5-10 kHz range and its magnitude is found to be strongly temperature dependent. We test the performance of different cables designed to diagnose and tackle the noise, and find triboelectrics to be the dominant mechanism coupling the vibrations to the electrical signal. Flattening a semi-rigid cable or jacketing a flexible cable in order to restrict movement within the cable, successfully reduces the noise level by over an order of magnitude. Furthermore, we characterize the effect of the pulse tube vibrations on an electron spin qubit device in this setup. Coherence measurements are used to map out the spectrum of the noise experienced by the qubit, revealing spectral components matching the spectral signature of the pulse tube.

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http://hdl.handle.net/10453/159864