Investigation of Josephson interferometer potentials by ac excitations
M. Cirillo, P. Carelli, M. G. Castellano, F. Chiarello, C. Cosmelli, N. Grønbech-Jensen, R. Leoni,
J. E. Marchese, F. Mattioli, D. Simeone, G. Torrioli
Physica C 437, 46 (2006),
Decoherence in a superconducting quantum bit circuit
G. Ithier, E. Collin, P. Joyez, P. J. Meeson, D. Vion, D. Esteve, F. Chiarello, A. Shnirman, Y. Makhlin, J. Schriefl, and G. Schön
Phys. Rev. B 72, 134519 (2005).
Superconducting tunable flux qubit with direct readout scheme
Fabio Chiarello, Pasquale Carelli, Maria Gabriella Castellano, Carlo Cosmelli, Lorenzo Gangemi, Roberto Leoni, Stefano Poletto, Daniela Simeone, and Guido Torrioli
Supercond. Sci. Technol. 18, 1370 (2005).
A New Flux/Phase Qubit With Integrated Readout
Maria Gabriella Castellano, Fabio Chiarello, Roberto Leoni, Guido Torrioli,
Pasquale Carelli, Carlo Cosmelli, Marilena Di Bucchianico, Francesco Mattioli,
Stefano Poletto, and Daniela Simeone
IEEE trans. on Appl. Supercond. 15, 849 (2005).
Variable transformer for controllable flux coupling
M. G. Castellano, F. Chiarello, R. Leoni, D. Simeone, G. Torrioli, C. Cosmelli,
P. Carelli
Applied Physics Letters 86, 152504 (2005)
Microwave-induced thermal escape in Josephson junctions
N. Gr?nbech-Jensen, M.G. Castellano, F. Chiarello, M. Cirillo, C. Cosmelli,
L.V. Filippenko, R. Russo, and G. Torrioli
Phys. Rev. Lett. 93, 107002 (2004)
Realization and characterization of a SQUID flux qubit with direct readout
scheme
F. Chiarello, M.G. Castellano, R. leoni, G. Torrioli, C. Cosmelli, P. Carelli
Proceedings MQC2 Conference, Naples, 2004
Anomalous thermal escape statistics in Josephson systems perturbed by microwaves
Niels Groenbech-Jensen, M.G. Castellano, F. Chiarello, M. Cirillo, C. Cosmelli,
L. V. Filippenko, R. Russo, G. Torrioli
Proceedings MQC2 Conference, Naples, 2004
Laser switch for stroboscopic read-out of magnetic flux
Marco Ferrara, Pasquale Carelli, Fabio Chiarello, Maria Gabriella Castellano,
and Guido Torrioli, Carlo Cosmelli
Review of Scientific Instruments 75, 2116 (2004)
I dispositivi a singolo elettrone e le loro applicazioni
M.G. Castellano
Nanotec-IT newsletter n.2, ottobre 2004, p. 19
Doped silicon and NIS junctions for bolometer applications
R. Leoni, B. Buonomo, G. Castellano, F. Mattioli, G. Torrioli, L. Di Gaspare,
F. Evangelisti
Nucl. Instr. and Methods in Phys. Res. A 520, 44-47 (2004).
Tracing the characteristics of a flux qubit with a hysteretic dc-superconducting
quantum interference device comparator
M. G. Castellano, F. Chiarello, R. Leoni, D. Simeone, G. Torrioli, C. Cosmelli,
R. Buttiglione, S. Poletto, P. Carelli
J. Appl. Phys. 94, 7935-7937 (2003)
Quantum dynamics of a microwave driven SQUID
C. Cosmelli, P. Carelli, M.G. Castellano, F. Chiarello, G. Diambrini Palazzi,
M. Di Bucchianico, R. Leoni, S.Poletto, G. Torrioli
Superconductor Science and Technology 16, 1337-1339 (2003)
Macroscopic Quantum Behavior of Superconducting Quantum Interference Devices
M. G. Castellano
Fortschr. Phys. 51, 288-294 (2003)
Stroboscopic single-shot detection of the flux state in a radio frequency superconducting
quantum interference device
C. Cosmelli, F. Sciamanna, M. G. Castellano, R. Leoni, and G. Torrioli, P. Carelli
and F. Chiarello
Appl. Phys. Lett. 80, 3150-3152 (2002)
Test of a rf SQUID system with stroboscopic one-shot read-out under microwave
irradiation
P. Carelli, M.G. Castellano, F. Chiarello, C. Cosmelli, R. Leoni, F. Sciamanna,
G. Torrioli
III int. workshop on Macroscopic Quantum Coherence and Quantum Computing, 3-7
June, 2002, Napoli
Superconducting devices for quantum logic gates using magnetic flux states
M. G. Castellano, F. Chiarello
Proc. of International School of Physics “Enrico Fermi”, CXLVIII
course on Experimental Quantum Computation and Information [Varenna, 17 - 27
July 2001], IOS Press (2002)), p. 493-510
An integrated system of SQUIDs for the study of macroscopic quantum coherence
C. Cosmelli, M. G. Castellano, R. Leoni, G. Torrioli, P. Carelli, F. Chiarello
Supercond. Sci. Technol. 14, 1031 (2001)
Characterization of superconducting devices spanning the charging to Josephson
regimes
M. G. Castellano, R. Leoni, G. Torrioli, B. Buonomo, D. Simeone, P. Carelli,
F. Chiarello, F. Mattioli, C. Cosmelli
Supercond. Sci. Technol. 14, 1156 (2001)
Aluminum single electron transistors studied at 0.3 K in different transport
regimes
B. Buonomo, M. G. Castellano, R. Leoni, F. Mattioli, G. Torrioli, P. Carelli,
F. Chiarello, C. Cosmelli
J. Applied Physics 89, 6545 (2001)
Noise measurements of a superconducting single electron transistor at T=0.3K
B. Buonomo, P. Carelli, M.G. Castellano, F. Chiarello, C. Cosmelli, R. Leoni
and G. Torrioli
Macroscopic Quantum Coherence and Quantum Computing, Ed. D.V. Averin, B. Ruggiero,
P. Silvestrini, Kluvert Academic Plenum Publishers, p.173 (2001)
Superconducting devices to test Macroscopic Quantum Coherence on the flux states
of an rf SQUID
C. Cosmelli, P. Cappelletti, P. Carelli, M.G. Castellano, F. Chiarello, G. Diambrini
Palazzi, R. Leoni, N. Milanese, G. Torrioli
Macroscopic Quantum Coherence and Quantum Computing, Ed. D.V. Averin, B. Ruggiero,
P. Silvestrini, Kluvert Academic Plenum Publishers, p. 73 (2001)
SQUID systems for Macroscopic Quantum Coherence and Quantum Computing
P. Carelli, M.G. Castellano, F. Chiarello, C. Cosmelli, R. Leoni, G. Torrioli
IEEE Trans. on Applied Superconductivity 11, 210 (2001)
A hysteretic dc-SQUID for non invasive measurements of the flux states of an
rf-SQUID
C. Cosmelli, M.G. Castellano, P. Carelli, F. Chiarello, R. Leoni, G. Torrioli
IEEE Trans. on Applied Superconductivity 11, 990 (2001)
SQUIDs for macroscopic quantum coherence experiments
M. G. Castellano and MQC collaboration
Future Perspectives of Superconducting Josephson Devices, EuroConference on
Physics and Application of Multi-Junctions Superconducting Josephson Devices
-Maratea, 1-6 July 2000
Escape from the zero-voltage state in hysteretic dc-SQUID with different dimensionless
inductance
M. G. Castellano, A. Intelisano, R. Leoni, N. Milanese, G. Torrioli, C. Cosmelli,
P. Carelli, F. Chiarello
International Journal of Modern Physics B, 14, 3056 (2000)
A single electron transistor in the superconducting state
R. Leoni, M. G. Castellano, C. Pasqui, G. Torrioli, P. Carelli, F. Chiarello,
C. Cosmelli
Sensors and microsystems, Proceedings of the 5th Italian Conference, Ed. C.
Di Natale, A. D’Amico and P. Siciliano, World Scientific, Singapore, pp.
317-321 (2000)
A SQUID Switch for a Macroscopic Quantum Coherence Experiment
M. G. Castellano, G. Torrioli, F. Chiarello, C. Cosmelli, P. Carelli
Inst. Phys. Conf. Ser., 167, 593 (1999)
Experimental evaluation of the instrinsic dissipation from energy-level quantization
in Josephson devices
C. Cosmelli, P. Carelli, M.G. Castellano, F. Chiarello, R. Leoni, B. Ruggiero,
P. Silvestrini, G. Torrioli
J. of Superconductivity 12, 773-781 (1999)
Return current in hysteretic Josephson junctions: Experimental distribution
in the thermal activation regime
M.G. Castellano, G. Torrioli, F. Chiarello, C. Cosmelli, P. Carelli
Journal Applied Physics 86, 6405-6411 (1999)
Measurements of the Decoherence Time from Energy Level Quantization in Josephson
Junctions and rf SQUIDs
Carlo Cosmelli, Fabio Chiarello, Gianluca D’Agosta, Maria Gabriella Castellano,
Guido Torrioli
IEEE Trans. on Appl. Supercond. 9, 4123-4126 (1999)
Energy levels quantization in underdamped Niobium Josephson junctions
B. Ruggiero, C. Granata, E. Esposito, V. G. Palmieri, M. G. Castellano, C. Cosmelli,
M. Russo, P. Silvestrini
IEEE Trans. on Appl. Supercond. 9, 3978-3981 (1999)
Measurement of the intrinsic dissipation of a macroscopic system in the quantum
regime
P. Carelli, M.G. Castellano, F. Chiarello, C. Cosmelli, G. Diambrini-Palazzi,
R. Leoni, G. Torrioli
Physical Review Letters 82, 5357-5360 (1999)
Effects of Energy Level Quantization on the Supercurrent Decay of Josephson
Junctions
B. Ruggiero, M. G. Castellano, G. Torrioli, C. Cosmelli, F. Chiarello, V.G.
Palmieri, C. Granata, P. Silvestrini
Phys. Rev. B 59, 177-180 (1999)
Measurements of thermal switching between metastable flux states in a rf-SQUID
with intermediate damping
M.G.Castellano, R.Leoni, G.Torrioli, C.Cosmelli, F.Chiarello, P. Carelli
Appl. Superconductivity 5, 405-411 (1998)
Towards an experiment of MQC: determination of the decoherence time from energy
level quantization in rf SQUIDs
C. Cosmelli, P. Carelli, M. G. Castellano, F. Chiarello, R. Leoni, G. Torrioli
Quantum Coherence and Decoherence - ISQM, Ed. Y.A. Ono and K. Fujikawa, Elsevier
Science B. V., Tokyo, pp. 245-248 (1998)
The return current in hysteretic Nb/AlOx/Nb Josephson junctions: experimental
distribution in thermal activation regime, with an applied magnetic field
M. G. Castellano, G. Torrioli, C. Cosmelli, F. Chiarello, P. Carelli
ISEC ’97, 6th International Superconductive Electronics Conference, Ed.
H. Koch and S. Knappe, PTB, Berlin, pp.194-196 (1997)
Measurements of thermal switching between metastable flux states in a rf-SQUID
with intermediate damping
M. G. Castellano, R. Leoni, G. Torrioli, C. Cosmelli, F. Chiarello, P. Carelli
ISEC ’97, 6th International Superconductive Electronics Conference, Ed.
H. Koch and S. Knappe, PTB, Berlin, pp.92-94 (1997)
Development and test of Josephson devices for an experiment of Macroscopic
Quantum Coherence
P. Carelli, M.G.Castellano, C. Cosmelli, R. Leoni, G. Torrioli
Il Nuovo Cimento D 19, 1423-1428 (1997)
Magnetic field dependence of thermal excitations in Josephson junctions
M.G. Castellano, C. Cosmelli, G. Torrioli, P. Carelli, G. Rotoli, M. Cirillo
IEEE Trans. on Applied Superconductivity 7, 2430-2433 (1997)
The effective dissipation in Nb/AlOx/Nb Josephson junctions by return current
measurements
R. Cristiano, L. Frunzio, C. Nappi, M. G. Castellano, G. Torrioli, C. Cosmelli
J. Appl. Phys. 81, 7418-7426 (1997)
Thermally activated escape from the zero-voltage state in long Josephson junctions
M.G. Castellano, G. Torrioli, C. Cosmelli, A. Costantini, F. Chiarello, P. Carelli,
G. Rotoli, M. Cirillo, R.L. Kautz
Phys. Rev. B 54, 15417-28 (1996)
Switching dynamics of Nb/AlOx/Nb Josephson junctions: measurements for an experiment
of Macroscopic Quantum Coherence
M.G. Castellano, R. Leoni, G. Torrioli, F. Chiarello, C. Cosmelli, A. Costantini,
G. Diambrini-Palazzi, P. Carelli, R. Cristiano, L. Frunzio
J. Appl. Phys. 80, 2922-8 (1996)
Low temperature behaviour of Josephson junctions for the MQC (Macroscopic Quantum
Coherence) experiment
C. Cosmelli, G. Diambrini-Palazzi, F. Chiarello, A. Costantini, M.G. Castellano,
R. Leoni, G. Torrioli, P. Carelli, R. Cristiano, L. Frunzio
Applied Superconductivity 1995. Proceedings of EUCAS 1995, the Second European
Conference on Applied Superconductivity, IOP, Bristol, UK, pp. 1323-6 (1995)
MQC: an experiment for detecting macroscopic quantum coherence with a system
of SQUIDs
P.Carelli, M.G.Castellano, F.Chiarello, L.Chiatti, M.Cirillo, C.Cosmelli, G.Diambrini-Palazzi,
D.Fargion, R.Leoni, G.Rotoli, F.Scaramuzzi, G.Torrioli, A.Zirizzotti
Fundamental Problems in Quantum Mechanics, Ed. D.Greenberger and A.Zeilinger,
Proc. of New York Academy of Sciences, New York, p.845 (1995)
Tunnelling in a Double-Well SQUID Potential
G. Rotoli and P. Carelli
Proc. of International workshop on Long Josephson Junctions, Capri, 10-15 June
1994.
Proposal of an Experiment for Detecting Macroscopic Quantum Coherence with
a System of SQUIDs
C. Cosmelli and G. Diambrini Palazzi
Proposal to INFN, Roma, September 1993, and Addendum , Roma, November 1993,
unpublished.