Solving Kramers Equation PDE - Find a Solution

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SUMMARY

The discussion focuses on solving the partial differential equation (PDE) given by B P_{vv} - v P_x + (A v - F(x)) P_v + A P = 0, where A and B are constants and P = P(x,v). The user proposes using separation of variables and suggests an ansatz of the form P(x,v) = C_1 exp(C_2 x + C_3 V(x) + C_4 v + C_5 v^2). They derive conditions on the constants C_i, leading to a system of equations that complicates the solution due to the presence of F(x). The user seeks further suggestions to simplify the problem.

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Homework Statement


Homework Equations



Find a solution to the PDE
[tex]B P_{vv} - v P_x + (A v - F(x)) P_v + A P = 0[/tex]
where A and B are constants, P = P(x,v)

The Attempt at a Solution



I have no idea how to even guess a solution to this.
 
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I would suggest separation of variables, but that F(x) seems to screw things up a bit...
 
Assumeing [tex]F(x) = -V_x[/tex] and makeing an ansatz
[tex]P(x,v) = C_1 exp(C_2 x + C_3 V(x) + C_4 v + C_5 v^2)[/tex]
I get these conditions on the constants C_i
[tex](2BC_5+A)C_5=0[/tex]
[tex](4BC_5+A)C_4-C_2+(C_3+2C_5)F(x)=0[/tex]
[tex](BC_4-F(x))C_4+2BC_5=0[/tex]
in the second eq we can put C_3=-2C_5 and get rid of F(x) there, but it's still in the third eq. Suggestions?
 

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