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000892637 1001_ $$00000-0001-5410-118X$$aCardani, L.$$b0$$eCorresponding author
000892637 245__ $$aReducing the impact of radioactivity on quantum circuits in a deep-underground facility
000892637 260__ $$a[London]$$bNature Publishing Group UK$$c2021
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000892637 520__ $$aAs quantum coherence times of superconducting circuits have increased from nanoseconds to hundreds of microseconds, they are currently one of the leading platforms for quantum information processing. However, coherence needs to further improve by orders of magnitude to reduce the prohibitive hardware overhead of current error correction schemes. Reaching this goal hinges on reducing the density of broken Cooper pairs, so-called quasiparticles. Here, we show that environmental radioactivity is a significant source of nonequilibrium quasiparticles. Moreover, ionizing radiation introduces time-correlated quasiparticle bursts in resonators on the same chip, further complicating quantum error correction. Operating in a deep-underground lead-shielded cryostat decreases the quasiparticle burst rate by a factor thirty and reduces dissipation up to a factor four, showcasing the importance of radiation abatement in future solid-state quantum hardware.
000892637 536__ $$0G:(DE-HGF)POF4-522$$a522 - Quantum Computing (POF4-522)$$cPOF4-522$$fPOF IV$$x0
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000892637 7001_ $$0P:(DE-HGF)0$$aValenti, F.$$b1
000892637 7001_ $$0P:(DE-HGF)0$$aCasali, N.$$b2
000892637 7001_ $$0P:(DE-Juel1)151130$$aCatelani, G.$$b3$$eCorresponding author
000892637 7001_ $$00000-0002-2634-3103$$aCharpentier, T.$$b4
000892637 7001_ $$0P:(DE-HGF)0$$aClemenza, M.$$b5
000892637 7001_ $$0P:(DE-Juel1)178649$$aColantoni, I.$$b6
000892637 7001_ $$0P:(DE-HGF)0$$aCruciani, A.$$b7
000892637 7001_ $$00000-0002-2945-0983$$aD’Imperio, G.$$b8
000892637 7001_ $$00000-0003-2019-0967$$aGironi, L.$$b9
000892637 7001_ $$00000-0002-4341-5228$$aGrünhaupt, L.$$b10
000892637 7001_ $$0P:(DE-HGF)0$$aGusenkova, D.$$b11
000892637 7001_ $$0P:(DE-HGF)0$$aHenriques, F.$$b12
000892637 7001_ $$0P:(DE-HGF)0$$aLagoin, M.$$b13
000892637 7001_ $$00000-0002-9043-4691$$aMartinez, M.$$b14
000892637 7001_ $$00000-0003-0187-3770$$aPettinari, G.$$b15
000892637 7001_ $$00000-0001-5072-9156$$aRusconi, C.$$b16
000892637 7001_ $$0P:(DE-Juel1)180928$$aSander, O.$$b17
000892637 7001_ $$0P:(DE-HGF)0$$aTomei, C.$$b18
000892637 7001_ $$0P:(DE-HGF)0$$aUstinov, A. V.$$b19
000892637 7001_ $$0P:(DE-HGF)0$$aWeber, M.$$b20
000892637 7001_ $$00000-0003-4602-5257$$aWernsdorfer, W.$$b21
000892637 7001_ $$00000-0002-8945-1128$$aVignati, M.$$b22
000892637 7001_ $$00000-0001-5160-7396$$aPirro, S.$$b23
000892637 7001_ $$00000-0002-6776-9792$$aPop, I. M.$$b24
000892637 773__ $$0PERI:(DE-600)2553671-0$$a10.1038/s41467-021-23032-z$$gVol. 12, no. 1, p. 2733$$n1$$p2733$$tNature Communications$$v12$$x2041-1723$$y2021
000892637 8564_ $$uhttps://juser.fz-juelich.de/record/892637/files/s41467-021-23032-z.pdf$$yOpenAccess
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