Concept

Phase qubit

Related publications (71)

Diffusion-engineered quasiparticle multiplication for STJ single photon detectors

We have designed a diffusion-engineered, singlephoton spectrometer in the optical-UV range using a superconducting tunnel junction. The optical photon is absorbed in a Ta film and creates excess quasiparticles. These trap into an Al tunnel junction. Intern ...

2005

Quasi-Debye microwave loss as an intrinsic limitation of microwave performance of tunable components based on SrTiO3 and BaxSr1-xTiO3 ferroelectrics

Nava Setter, Alexander Tagantsev, Konstantin Astafiev

A model of the quasi-Debye loss mechanism in SrTiO3 and Ba0.6Sr0.4TiO3 perovskite ferroelectrics at microwave frequencies is presented. The field dependence and the size of the field-induced quasi-Debye loss contribution in SrTiO3 and Ba0.6Sr0.4TiO3 system ...

2005

Ultrafast coherent control of excitons and exciton-polaritons in quantum nanostructure

Benoît Marie Joseph Deveaud, Xiao Wang

We have demonstrated ultrafast coherent control of excitons and exciton-polaritons in semiconductor quantum nanostructures. An InGaAs/AlGaAs multi-quantum-well Bragg structure and an AlGaAs/GaAs crescent-shaped quantum wire structure were used as samples f ...

2002

Ultrafast phase-locked spectroscopy of excitons in quantum nanostructures

Benoît Marie Joseph Deveaud, Xiao Wang

We have investigated the ultrafast coherent dynamics of exciton-polaritons and excitons in semiconductor quantum nanostructures, including InGaAs/AlGaAs multi quantum well Bragg structures and AlGaAs/GaAs crescent shaped quantum wire samples, by using a ph ...

2002

Experimental S-2DEG-S junction characteristics and a novel interpretation

Jean-François Carlin, Alok Rudra, Marc Ilegems

We present experimental transport characteristics of long and ballistic superconductor - 2-dimensional electron gas - superconductor junctions obtained in a temperature range from 1K down to 10mK. Surprisingly the critical current I-c can be fitted to the ...

1996

Inductance effects and dimensionality crossover in hybrid superconducting arrays

Herbert Shea

We report measurements made on hybrid arrays consisting of superconducting wires along one direction of a square geometry and Josephson junctions along the perpendicular direction. The differential resistance Rd across the array as a function of normalized ...

1995

Current phase relation of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/(-δ) step edge junction

Dirk Grundler

The small signal rf impedance of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-/spl delta// step edge junction rf SQUIDs operating in a strongly nonhysteretic mode has been measured. The phase dependent inductance L/sub J/(/spl phi/) and the current phase relation I/s ...

Institute of Electrical and Electronics Engineers1995

Localization Effects in Transition-Metal Doped Bi2sr2cacu2o8+Y High-Temperature Superconductors

Giorgio Margaritondo, Helmuth Berger

Doping Bi2Sr2Ca1Cu2O8+y with Co causes a superconductor-insulator transition. We study correlations between changes in the electrical resistivity rho(ab)(T) and the electronic bandstructure using identical single crystalline samples. For undoped samples th ...

1995

Microstructure and electrical properties of pure 110 K phase in the BiPbSrCaCuO system

Davor Pavuna, Helmuth Berger

The temperature dependence of the DC resistivity and AC magnetic susceptibility was investigated in bulk ceramics of the BiPbSrCaCuO system with 2212-free (2223) phase. The temperature domain needed to synthesize this phase was small and, according to the ...

1991

Complex AC conductance of YBaCuO films

Philippe Flückiger

The AC linear response of YBaCuO films prepared by RF magnetron sputtering to a small oscillating field was studied as a function of temperature and transverse magnetic field. The structures observed are quite similar to those found in artificially prepare ...

1989

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