000901818 001__ 901818
000901818 005__ 20240213111710.0
000901818 0247_ $$2doi$$a10.1116/5.0062868
000901818 0247_ $$2Handle$$a2128/28779
000901818 0247_ $$2altmetric$$aaltmetric:114741025
000901818 0247_ $$2WOS$$aWOS:001135624300002
000901818 037__ $$aFZJ-2021-03842
000901818 082__ $$a530
000901818 1001_ $$0P:(DE-Juel1)176180$$aHsu, Hao$$b0$$eCorresponding author
000901818 245__ $$aCharge dynamics in quantum-circuit refrigeration: Thermalization and microwave gain
000901818 260__ $$a[Melville, NY]$$bAIP Publishing$$c2021
000901818 3367_ $$2DRIVER$$aarticle
000901818 3367_ $$2DataCite$$aOutput Types/Journal article
000901818 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1634132948_15942
000901818 3367_ $$2BibTeX$$aARTICLE
000901818 3367_ $$2ORCID$$aJOURNAL_ARTICLE
000901818 3367_ $$00$$2EndNote$$aJournal Article
000901818 520__ $$aPrevious studies of photon-assisted tunneling through normal-metal–insulator–superconductor junctions have exhibited potential for providing a convenient tool to control the dissipation of quantum-electric circuits in situ. However, the current literature on such a quantum-circuit refrigerator (QCR) does not present a detailed description for the charge dynamics of the tunneling processes or the phase coherence of the open quantum system. Here, we derive a master equation describing both quantum-electric and charge degrees of freedom, and discover that typical experimental parameters of low temperature and yet lower charging energy yield a separation of time scales for the charge and quantum dynamics. Consequently, the minor effect of the different charge states can be taken into account by averaging over the charge distribution. We also consider applying an ac voltage to the tunnel junction, which enables control of the decay rate of a superconducting qubit over four orders of magnitude by changing the drive amplitude; we find an order-of-magnitude drop in the qubit excitation in 40 ns and a residual reset infidelity below 10−4. Furthermore, for the normal island, we consider the case of charging energy and single-particle level spacing large compared to the superconducting gap, i.e., a quantum dot. Although the decay rates arising from such a dot QCR appear low for use in qubit reset, the device can provide effective negative damping (gain) to the coupled microwave resonator. The Fano factor of such a millikelvin microwave source may be smaller than unity, with the latter value being reached close to the maximum attainable power.
000901818 536__ $$0G:(DE-HGF)POF4-5221$$a5221 - Advanced Solid-State Qubits and Qubit Systems (POF4-522)$$cPOF4-522$$fPOF IV$$x0
000901818 588__ $$aDataset connected to DataCite
000901818 7001_ $$00000-0002-6319-2789$$aSilveri, Matti$$b1
000901818 7001_ $$00000-0002-9248-8087$$aSevriuk, Vasilii$$b2
000901818 7001_ $$00000-0001-5084-2298$$aMöttönen, Mikko$$b3
000901818 7001_ $$0P:(DE-Juel1)151130$$aCatelani, Gianluigi$$b4
000901818 773__ $$0PERI:(DE-600)3000330-1$$a10.1116/5.0062868$$gVol. 3, no. 4, p. 042001 -$$n4$$p042001 -$$tAVS Quantum Science$$v3$$x2639-0213$$y2021
000901818 8564_ $$uhttps://juser.fz-juelich.de/record/901818/files/5.0062868.pdf$$yOpenAccess
000901818 909CO $$ooai:juser.fz-juelich.de:901818$$pdnbdelivery$$pdriver$$pVDB$$popen_access$$popenaire
000901818 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)176180$$aForschungszentrum Jülich$$b0$$kFZJ
000901818 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)151130$$aForschungszentrum Jülich$$b4$$kFZJ
000901818 9131_ $$0G:(DE-HGF)POF4-522$$1G:(DE-HGF)POF4-520$$2G:(DE-HGF)POF4-500$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-5221$$aDE-HGF$$bKey Technologies$$lNatural, Artificial and Cognitive Information Processing$$vQuantum Computing$$x0
000901818 9141_ $$y2021
000901818 915__ $$0StatID:(DE-HGF)0430$$2StatID$$aNational-Konsortium
000901818 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess
000901818 920__ $$lyes
000901818 9201_ $$0I:(DE-Juel1)PGI-11-20170113$$kPGI-11$$lJARA Institut Quanteninformation$$x0
000901818 980__ $$ajournal
000901818 980__ $$aVDB
000901818 980__ $$aUNRESTRICTED
000901818 980__ $$aI:(DE-Juel1)PGI-11-20170113
000901818 9801_ $$aFullTexts