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How does electric current flow quantum mechanically?

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When an electron is excited from external energy like heat, it gains that energy and transit to higher state. Similarly, when transiting from higher to lower orbital, electrons emit energy E=hμ. read more

Electrons are quantum mechanical particles. To analyse their behaviour we need the help of quantum mechanics. Though scientists have developed many models of electric current phenomenon which are much easier to analyse and understand. But still quantum mechanical model of electrical current phenomenon is more elaborate. read more

Also, a second question is what causes the electric field in the conductor to be practically zero (compared to that in the resistor) in a non - electrostatic model (i.e., when there is a current). The electric field is not zero in a conductor. If it was, current would stop flowing, unless it was a superconductor. read more

That is the most electrical conductivity, thereby the lowest electrical resistance, comes in the middle of the periodic chart. It is the column, 29-Cu Copper, 47-Ag Silver, and 79-Au Gold. The challenge for thinking of these using the quantum model is that the electrons are in the toward the max of the current d-shell. read more

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