Time Independent Schrodinger Wave Equation
As discussed in the article of time dependent Schrodinger wave equation:
V=A exp[-i/Ћ(Et-px]
= A exp(-i/Ћ Et) exp(i/Ћ)
Ψ=ψ’ exp(-iEt/Ћ) (1)
Where Ћ = h/2π
So, ψ is a product of a time dependent function exp(-i/Ћ Et) and a position dependent function
Ψ’= A exp(-i/Ћ px)
Differentiating equation (1) w.r.t.x, We have
dψ/dx = exp(-i/ЋEt) dψ’/dx
and d2ψ/dx2= exp(-i/Ћ Et) d2ψ’/dx2 (2)
Also on differentiating ψ w.r.t. t, we have
dψ/dt=ψ’ exp (-iEt/Ћ) (I E/Ћ)
dψ/dt=-(iE/Ћ)ψ’ exp(-I Et/Ћ) (3)
Put equations [1-3] in time dependent Schrodinger wave equation (discussed earlier),
iЋ[-iE/Ћψ’ exp(-iEt/Ћ)]= -Ћ2/2m[exp(i/ЋEt) d2ψ’/dx2] +V ψ’ exp(iEt/Ћ)
Eψ’ exp(iEt/Ћ) = -Ћ2/2m exp(i/Ћ Et) d2ψ’/dx2 + V ψ’exp(iEt/Ћ)
Dividing throughout by expression (i/Ћ Et) we have
Eψ’= (-Ћ2/2π) d2ψ’/dx2+V ψ’
Or (E-V)ψ’=-Ћ2/2m dψ’/dx2
or d2Ψ’/dx2 + (2m/Ћ2)(E-V)ψ’ (4)
Which is time independent form of Schrodinger wave equation in one dimension.
In three-dimensional form:
d2 Ψ’/dx2+ d2ψ’/dy2+ d2Ψ’/ d2x2+2m/Ћ2(E-V)ψ’=0
In this equation, ψ’ equation, ψ’(x) is also called the wave function. The potential V(x) does not contain the time explicity and E, the total energy of the particle is a constant.
dear sir,
thx for providing this article on winnerscience….
yours obediently,
raghav sharma
b.tech (ece,1)
group a1