物理学院 School of Physics, Nanjing University

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Superconductivity and Quantum Mechanics at the Macro-Scale

2017年10月19日

报告题目: Superconductivity and Quantum Mechanics at the Macro-Scale

报告人:PROF. STEVEN ALLAN KIVELSON

                  Stanford University

                  Member of the National Academy of Sciences

                  Fellow of the American Academy of Arts and Sciences

                  Fellow of the American Physical Society

        美国科学院院士,《npj-量子材料》主编

报告地点:仙林校区仙1-108

报告时间:20171026号(周四)下午6:30

报告内容简介:

Superconductivity is perhaps the most spectacular macroscopic quantum phenomenon. A “persistent current” in a ring of superconducting wire will continue to flow forever – a laboratory realization of perpetual motion. A voltage across a junction between two superconductors produces an oscillating current with a frequency that is determined exactly by the voltage and the fundamental constant of quantum mechanics, Planck’s constant. Superconductivity is the quintessential example of an “emergent phenomenon” in physics, in which the collective behavior cannot be understood in terms of the properties of any finite collection of microscopic constituents (i.e. electrons). Notable physicists including Einstein, Heisenberg, and Feynman tried and failed for half a century to achieve the basic understanding of superconductivity that was only achieved in the mid 1950’s and early 1960’s. However, many fundamental issues remain to be resolved, including those related to the more recent discovery of unconventional “high temperature superconductivity” in a variety of synthetic metals and the construction of coherent superconducting “Q-bits” which act as laboratory realizations of Schrodinger’s cat.

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