Steven Kivelson | Superconductivity and Quantum Mechanics at the Macro-S...
Δημοσιεύτηκε στις 12 Μαΐ 2016
Professor
Steven Kivelson of the Stanford Institute for Theoretical Physics
(SITP) introduces the physics of supercondictivity and condensded matter
physics.
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.
Steven Kivelson of the Stanford Institute for Theoretical Physics
(SITP) introduces the physics of supercondictivity and condensded matter
physics.
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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