{"id":7447,"date":"2024-03-05T21:45:24","date_gmt":"2024-03-05T21:45:24","guid":{"rendered":"https:\/\/www.appliedsuperconductivity.org\/asc2024\/?page_id=7447"},"modified":"2026-06-08T04:46:16","modified_gmt":"2026-06-08T04:46:16","slug":"clarke-abstract","status":"publish","type":"page","link":"https:\/\/www.appliedsuperconductivity.org\/asc2026\/clarke-abstract\/","title":{"rendered":"John Clarke Abstract"},"content":{"rendered":"
[vc_row css=”.vc_custom_1691433986329{padding-top: 15px !important;}”][vc_column width=”5\/6″][vc_custom_heading text=”Plenary Presentation Details” font_container=”tag:p|font_size:35|text_align:left|color:%2306657c” google_fonts=”font_family:Arimo%3Aregular%2Citalic%2C700%2C700italic|font_style:400%20regular%3A400%3Anormal”][vc_column_text css=”.vc_custom_1780893971080{margin-bottom: 25px !important;padding-top: 15px !important;padding-bottom: 15px !important;}”]John Clarke
\n<\/strong><\/span>\u00a0 \u00a0 \u00a0 \u00a0 Professor at the Department of Physics, UC Berkeley, Awardee of the 2025 Nobel Prize in Physics<\/strong><\/span><\/span><\/span><\/p>\n

 <\/p>\n

PRESENTATION DAY AND TIME<\/strong><\/span><\/p>\n

Tuesday, September 8, 2026 | 8:00 a.m.<\/span><\/p>\n

PRESENTATION TITLE<\/strong><\/span><\/p>\n

From SLUGs to Macroscopic Quantum Phenomena<\/p>\n

ABSTRACT<\/strong><\/span><\/p>\n

For my research at Cambridge University my thesis advisor, Brian Pippard, suggested a project requiring a voltage sensitivity of 10-12<\/sup>\u00a0to 10-13<\/sup>\u00a0VHz-1\/2<\/sup>. The state of the art was 10-9<\/sup>\u00a0VHz-1\/2<\/sup>. Shortly after my arrival, Brian Josephson presented a seminar on his research. From the knowledge I learned from his talk, I invented the Superconducting Low-Inductance Undulatory Galvanometer, which consisted of a blob of PbSn solder melted around a piece of Nb wire. This enabled me to achieve a sensitivity of 10-14<\/sup>\u00a0VHz-1\/2\u00a0<\/sup>and thus write my thesis. Early in 1968 I moved to the University of California, Berkeley. In 1980\u00a0John\u00a0Martinis joined my group as a graduate student and in 1982 Michel Devoret joined as a postdoctoral scholar. We worked on a challenging question proposed by Tony Leggett: Do macroscopic variables obey quantum mechanics? This research resulted in the publication of two Physical Review Letters in 1985:\u00a0Energy-Level Quantization in the Zero-Voltage State of a Current-Biased Josephson Junction\u00a0<\/em>and\u00a0Measurements of Macroscopic Quantum Tunneling out of the Zero-Voltage State of a Current-Biased Josephson Junction.\u00a0<\/em>The combination of these two publications provided overwhelming evidence for the existence of energy quantization and macroscopic quantum tunneling in an electrical circuit.<\/span><\/p>\n[\/vc_column_text][\/vc_column][vc_column width=”1\/6″][vc_column_text css=”.vc_custom_1779131691374{padding-top: 20px !important;}”]\n\n\n\n\n\n
Program<\/strong><\/a><\/td>\n<\/tr>\n
Plenary Speakers<\/strong><\/a><\/td>\n<\/tr>\n
<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][\/vc_column][\/vc_row]\n<\/section>","protected":false},"excerpt":{"rendered":"

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