- #1
exponent137
- 564
- 34
In
https://quantummechanics.ucsd.edu/ph130a/130_notes/node45.html
after
"Instead of an equation which is second order in the time derivative, we can make a first order equation, like the Schrödinger equation, by extending this equation to four components."
it is evident that the solution is obtained with help of ##a^2-b^2=(a+b)(a-b)##
I cannot follow in this derivation, how rows ##\phi^{(L)}=...## and ##\phi^{(R)}=...## are used. Maybe more steps instead of these two rows will help.
Although I think that Feynman once described this more clearly in his book about QED.
Can someone, please, gives a link or more clearly explains this type of derivation of Dirac equation?
https://quantummechanics.ucsd.edu/ph130a/130_notes/node45.html
after
"Instead of an equation which is second order in the time derivative, we can make a first order equation, like the Schrödinger equation, by extending this equation to four components."
it is evident that the solution is obtained with help of ##a^2-b^2=(a+b)(a-b)##
I cannot follow in this derivation, how rows ##\phi^{(L)}=...## and ##\phi^{(R)}=...## are used. Maybe more steps instead of these two rows will help.
Although I think that Feynman once described this more clearly in his book about QED.
Can someone, please, gives a link or more clearly explains this type of derivation of Dirac equation?
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