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vkc102
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Why do theories of superconductivity need to be quantum field theories with 2nd quantisation? Isn't first quantisation enough?
vkc102 said:Why do theories of superconductivity need to be quantum field theories with 2nd quantisation? Isn't first quantisation enough?
vkc102 said:Oops I think didn't phrase my question well enough. I meant to ask why doesn't a classical field theory like the Kronig Penny model work for superconductivity. Is it because without quantisation of the field, you can't get the phonons electron interaction to form Cooper pairs? Can you even get phonons at all for that matter with a classical field?
Superconductivity is a phenomenon where certain materials can conduct electricity with zero resistance at very low temperatures. This means that an electric current can flow through the material without any loss of energy, making it highly efficient for use in various technologies.
Type I superconductors are characterized by a sudden and complete loss of electrical resistance below a certain critical temperature. Type II superconductors, on the other hand, have a more gradual decrease in resistance and can also maintain a certain amount of electrical resistance even below the critical temperature.
Quantum field theory is used to describe the behavior of elementary particles and their interactions. Superconductivity is a macroscopic manifestation of quantum behavior at the atomic level. The theory helps explain the properties of superconductors and how they are able to conduct electricity with zero resistance.
Currently, superconductivity can only be achieved at very low temperatures, typically below -200 degrees Celsius. However, researchers are constantly working on discovering new materials and techniques that could potentially lead to superconductivity at higher temperatures, making it more practical for everyday use.
Superconductivity has a wide range of practical applications, including in medical imaging devices like MRI machines, in power transmission and storage systems, and in high-speed computing. It also has potential uses in transportation, such as in magnetic levitation trains, and in various scientific instruments and experiments.