LTD-15 International Workshop on Low Temperature Detectors

1. Antonio Barone Superconductivity, Josephson Effect & LT-Detectors: a trip into memories and science Roberto Cristiano C.N.R. Istituto di Cibernetica “E. Caianiello”, Pozzuoli, Napoli, Italy LTD-15 International Workshop on Low Temperature Detectors June 24th – 28th 2013 California Institute of Technology Pasadena, California, USA

2. Keywords and the logical paths where to bring back the interest and relevant contributions of Antonio Barone are: • Josephson Effect • Macroscopic quantum phenomena • LT detectors

3. 1974 • Samples made in better experimental conditions and a more sophisticated measurement technique. • Full range of temperatures • Control experiment for the Ambegaokar & Baratoff theory (based on BCS microscopic theory)

4. Electrodynamics of “long” Josephson Junctions • Soliton solutions • Soliton motion • soliton anti-soliton collisions restoring torque of the spring moment of inertia of the pendula gravitational torque

5. J. Appl. Phys. Vol 46 3628 (1975) 1 2 3 4 3 1 4 2

6. A. Barone - G. Paternò Physics and Applications of the Josephson Effect 1982 Wiley & Sons

7. 1983 Academy of Sciences of the Soviet Union Diploma of Doctor of the Physical and Matematical Sciences The first scientist from a western country who received the highest academic title in Soviet Union. Later he also received the coveted Kapitza Prize (gold medal).

8. Brian Josephson AntonioBarone SvevaBarone Alex Muller Paul Chu December 2001 - Stockholm Nobel Prize Centennial Lecture on the Josephson Effect at the Nobel Symposium for Physics

9. Symmetry of the order parameter

10. Phase-sensitive experiments

11. Thermal activation Quantum activation Macroscopic quantum phenomena V=0 I V≠0 0 V

12. Barone A., Ovchinnikov Yu.N. Macroscopic quantum tunneling in small and large dissipation regimes. J. Low Temp. Phys. 55, 297(1984) Ovchinnikov Yu. N, Cristiano R., Barone A. Effect of capacitance on I-V characteristics of overdamped Josephson junctions; classical and quantum limits J. Appl. Phys. 56, 1473 (1984) Barone A., Cristiano R., Silvestrini P. Supercurrent decay in underdamped Josephson junctions: the non-stationary case J. Appl. Phys. 58, 3822 (1985) Barone A., Kurizki G., Kofman, G. Dynamical control of macroscopic quantum tunneling. Phys. Rev. Lett. 92, 200403 (2004) Bauch T, Lombardi F, Tafuri F, Barone A, Rotoli G, Delsing P, Claeson T, Macroscopic quantum tunneling in d-wave YBa2Cu3O7-delta Josephson junctions Phys. Rev. Lett. 94, 087003 (2005) Ivlev B., Escudero R., Pepe G.P., Latempa R., Barone A., Barkov F., Lisenfield J., Ustinov, A. Extreme multiphoton phenomena in Josephson junctions (Euclidean resonance). Phys. Rev. B 72, 1 (2005) Barone A , Gasperini M, and Rotoli G Macroscopic quantum tunneling and the ‘‘cosmic’’ Josephson effect Phys. Rev. D 82, 087301 (2010)

13. J. Low Temp. Phys. 55, 297(1984)

14. Decay of false vacuum in quantum field theory • Relevant for cosmology : universe in a false vacuum ? • Nucleation processes of statistical physics • Crystallization of a supersaturated solution • Boiling of superheated fluid • Josephson phase in the washboard potential Coleman S, Phys. Rev D 15 2929 (1977)

15. LT - Detectors From Immagination and Rigor S. Termini Ed. Springer 2005 1962 Josephson Effect 1966 Degree in Nuclear Physics 1969Wood & WhitePulses Induced in Tunneling Currents between Superconductors by Alpha-Particles bombardment Applied Physics Letters 1968Superconducting Josephson tunnel junctions at the Cybernetics Laboratory of CNR in Arco Felice.

16. Sandro Vitale STJ - Superconducting Tunnel Junction From pair tunnelling (Josephson) To quasiparticles tunnelling current current 0 Voltage 0 Voltage 1984 Collaboration with the Genoa Group

17. STJ: the “island” geometry 1985Barone, Darbo, De Stefano, Gallinaro, Siri, Vaglio, Vitale Superconducting Nb-NbyOx-Pb tunnel Junctions as high resolution detectors for nuclear spectroscopy: preliminary results NIM A234, 61

18. 1987 My first paper Barone, Cristiano, Silvestrini Superconductive devices for ultra-fast discrimination in “Superconductive particle detectors” A. Barone Ed., World Scientific Publisher • 1987 October Workshop on Superconductive Particle detectors, Torino • 1987 May LTD -1 Workshop on Low Temperature Detectors, Ringberg Castle

19. LTD – 1 May 12-13, 1987

20. STJ Technology (1991) ElectroTechnical Laboratory (Takada) Tsukuba - Japan From the Josephson computer to STJ detectors

21. STJ: The annular geometry (2) Investigation of magnetic vortices in Josephson junctions (Abrikosov and Josephson vortices). Possible candidate as q-bit. Interesting analogy with the phenomenology of the early stage of evolution of the Universe (Kibble-Zureck transition and topological defects).

22. LTD - 14 August 2011 TES & Josephson weak link !! Sadleir J E et al PRL 104 047003 (2010) Dear Roberto I had only a very rapid reading of the preprint that you send me because tomorrow I will have the fourth operation to the eye. I hope I will be able to give a ….. betterglance in future. The subject is interesting…… Good LTD…. from what remain of….Antonio My Dearest Roberto,don’t change argument! We must talk about detectors! E sempe aro' ce sta l'effetto e Giuseppone ! My best regards to Angela Merkel. Ce verimmo !Antonio

23. Naples, 2010 with Josephson Antonio died on December 2011. He was the leader of the Italian superconductivity community In the Naples region there is one of the largest community working in superconductivity. Several generations of young researchers have been educated at his School. This memories cannot be dissociated from so many years spent working together and from the awareness of having had the privilege to deal with a real gentleman of science and life, a man of vision and perspective. This talk is dedicated to Sveva, Alberto and Livio