Why Does Nature Favor the Principle of Least Action?

  • Level: Graduate 
  • Thread starter Thread starter dEdt
  • Start date Start date
  • Tags Tags
    Least action
Join the discussion
Registration is free. Start your own thread to ask a follow-up.
1 reply · 2K views
dEdt
Messages
286
Reaction score
2
Hamilton's principle says that the action for the true path that a system follows will be stationary. As I understand it, the action is almost always least. Is there a reason why nature prefers least action rather over greatest action?
 
Physics news on Phys.org
Hamilton's principle says that the action will be stationary but we can certainly say that it won't be a maximum because we can always increase S by taking a faster, wiggly path with T>>0 so you know it won't be a maximum.

However it could still be a saddle point but "Principle of stationary action" doesn't sound as cool as "Principle of Least Action"