- #1
jostpuur
- 2,116
- 19
Is it possible to derive the Shrodinger's equation
[tex]
i\hbar\partial_t \Psi(t,p) = \frac{|p|^2}{2m}\Psi(t,p)
[/tex]
in momentum representation directly from a path integral?
If I first fix two points [itex]x_1[/itex] and [itex]x_2[/itex] in spatial space, solve the action for a particle to propagate between these point in time [itex]\Delta t[/itex], and then take the limit [itex]\Delta t\to 0[/itex], the action approaches infinity.
If I instead fix two points [itex]p_1[/itex] and [itex]p_2[/itex] in the momentum space, solve the action for a particle to propagate between these points in time [itex]\Delta t[/itex], and then take the limit [itex]\Delta t\to 0[/itex], the action does not approach infinity, but instead zero. So it looks like stuff goes somehow differently here.
[tex]
i\hbar\partial_t \Psi(t,p) = \frac{|p|^2}{2m}\Psi(t,p)
[/tex]
in momentum representation directly from a path integral?
If I first fix two points [itex]x_1[/itex] and [itex]x_2[/itex] in spatial space, solve the action for a particle to propagate between these point in time [itex]\Delta t[/itex], and then take the limit [itex]\Delta t\to 0[/itex], the action approaches infinity.
If I instead fix two points [itex]p_1[/itex] and [itex]p_2[/itex] in the momentum space, solve the action for a particle to propagate between these points in time [itex]\Delta t[/itex], and then take the limit [itex]\Delta t\to 0[/itex], the action does not approach infinity, but instead zero. So it looks like stuff goes somehow differently here.