International Workshop on Superconducting Nano-Electronics Devices: Sned Proceedings, Naples, Italy, May 28-June 1, 2001

ISBN-13: 9780306472664 / Angielski / Twarda / 2002 / 241 str.

Jukka Pekola; Jukka Pekola; Berardo Ruggiero

Opis

Thisvolumereportsthemajorpartofthescientificcontributionsofthefirstinternational workshoponSuperconductingNano-ElectronicsDevices(SNED)heldinNapoli, Italy, at theendofMay2001. Theaimoftheworkshopwastofocusonrecentexperimentalandtheoreticalresultsin thefieldofsuperconductingnano-electronicsdevices. Itcombinedphysicswithpresent andfuturetechnologicalapplications: bothfundamentalandappliedaspectswerecovered. SpecialemphasiswasgiventoquantumcoherenceandcomputationusingsmallJosephson junctions, noiseinultrasensitivenanodevicesandpossibilitiesofmakinguseofsupercon ductivityinvariouson-chipdevices. Withtheseattributesandwithrecognizedinvited speakersintheirspecialtiestheworkshopmanagedtobringtogetheracollectionof scientistsfromnearbybutdistinctresearchcommunities. Thiswaytheatmosphereofthe workshopbecameveryopenanddiscussionswerelivelybothduringandoutsidethe sessions. Thisfreshdiscussionhopefullygaveeveryparticipantalotofnewideasfor furtherworkbackintheirhomeinstitutes. OneofthecentraltopicsintheworkshopwastheuseofdifferentJosephsonjunction configurationsasimplementationsofquantumbits. Atthetimeoftheworkshopwewere justwaitingforthesecondwaveofbreakthroughsinthisfield: theresultsemergingfrom theparticipatinglaboratoriesoftheworkshopjustatthetimeofthewritingofthispreface perhapsalsoprovetheusefulnessofourworkshop. Anotherfocuswasonvarioustopicsrelatedtoultrasensativedetectors. Theybring quantumlimitationstoapplications, andmanydeviceconceptsareresultsofunderstanding fundamentalandexcitingphenomenainsuperconductivity. Noiseandon-chipcooling wereexplicitlydiscussedinthedetectorsessionsaswell. ThechoiceofthelocationrecognizestheroleandthetraditionsofNapoliespeciallyin thefieldofmacroscopicquantumcoherence, oneofthemainissuesoftheworkshop. It furtherguaranteedtheparticipantsastimulatingatmosphereatthemeeting. Inconclusion, wewishtothanktheIstitutoItalianopergliStudiFilosofici, theIstituto diCiberneticadelConsiglioNazionaledelleRicerche, theUniversityofJyviiskylii, the IstitutoNazionalediFisicaNucleare, theIstitutoNazionalediFisicadellaMateria, the DipartimentoScienzeFisiche, andtheRettoratodell'UniversitadiNapoli"FedericoII" fortheirsupport. ThanksarealsoduetoAirLiquide, CRY, Nanoway, OxfordInstruments, andRaith. ThisinitiativeisintheframeoftheinternationalactivityofMQC2Association on"MacroscopicQuantumCoherenceandComputing. "WeareindebtedtoC. Granata v vi PREFACE and V. Coratoforscientificassistance, andtoF. Caiazzo, E. DeGrazia, andA. M. Mazzarellafortheirvaluableassistanceinallthetasksconnectedtotheorganizationofthe Workshop. WearealsogratefultoL. Longobardi, A. Monaco, S. Piscitelli, andS. Rombetto forhintsandhelpduringtheWorkshop. ThanksareduetoL. DeFelice, S. Luongo, and V. Sindonifortheorganizationofthesocialevent. J. Pekola B. Ruggiero P. Silvestrini CONTENTS QuantumNondemolitionMeasurementsofaQubit . D. V. Averin BayesianQuantumMeasurementofaSingle-Cooper-PairQubit 11 A. Korotkov lIfNoiseinJosephsonQubits 15 E. Paladino, L. Faoro, G. Falci, and R. Fazio SwitchingCurrentsandQuasi-ParticlePoisoningintheSuperconducting SingleElectronTransistor 25 P. Agren, J. Walter, V. Sch611mann, andD. B. Haviland JosephsonSystemsforQuantumCoherenceExperiments 33 V. Corato, C. Granata, L. Longobardi, M. Russo, B. Ruggiero, andP. Silvestrini SolidStateAnalogueofDoubleSlitInterferometer. . . . . . . . . . . . . . . . . . . . . . 43 K. Yu. Arutyunov, T. T. Hongisto, andJ. P. Pekola NoiseandMicrowavePropertiesofSET-Transistors. . . . . . . . . . . . . . . . . . . . . 53 M. Ejrnres, M. T. Sa

Spis treści

Preface. Quantum nondemolition measurements of a qubit; D.V. Averin. Bayesian quantum measurement of a single-Cooper-pair qubit; A. Korotkov. 1/f noise in Josephson qubit; E. Paladino, et al. Switching currents and quasi-particle poisoning in the superconducting single electron transistor; P. Agren, et al. Josephson systems for quantum coherence experiments; V. Corato, et al. Solid state analogue of a double slit interferometer; K. Arutyunov, et al. Noise and microwave properties of SET-Transistors; M. Ejrnæs, et al. Use of small tunnel junctions operating at T=0.3K; R. Leoni, et al. A hysteretic single Cooper pair transistor for single shot reading of a charge-qubit; D. Vion, et al. Single Cooper pair electrometer based on a radio-frequency-SQUID scheme; A. Zorin. Possibility of single-electron devices and superconducting coherence; Yu.A. Pashkin, et al. Frequency-locked current of Cooper pairs in superconducting single electron transistor with ohmic resistor; S.V. Lotkhov, et al. Setup for experiment on the supercurrent-phase relation in Bloch transistors status and possible applications; M. Götz, et al. Single-electron transistors in the regime of high conductance; C. Walliser, et al. Superconducting transition-edge sensors for time & energy resolved single-photon counters and for dark matter search; B. Cabrera. Optimization of the hot-electron bolometer and cascade quasiparticle; L. Kuzmin. Noise in refrigerating tunnel junctions and in microbolometers; D.V. Anghel. Nonequilibrium quasiparticles and electron cooling by normal metal-superconductor tunnel junctions; D. Golubev, A. Vasenko. Mesoscopic Josephson junctions coupled to weak coherent fields: an example of reciprocal detection; R. Migliore, A Messina. Dynamics ofsuperconducting interferometers containing pi-junctions; V.K. Kornev, et al. Superconducting current-phase dependance in High-Tc symmetrical bicrystal junction; G.A. Ovsyannikov, et al. Superconducting quantum detector for astronomy and X-ray spectroscopy; A.D. Semenov, et al. Lifetime of even-parity states of a Bloch transistor; J. Männik, et al. Magnetic field dependance of retrapping currents in DC-SQUIDs.S. Saito, et al. Josephson versus Kondo coupling at a quantum dot with superconducting contacts; G. Campagano, et al. Index.