Possible Orbits in V = k r^4 Potential

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In a potential described by V = k r^4 with energy greater than 0, the nature of possible orbits varies based on the sign of k and the angular momentum l. For k < 0, if l = 0, the object falls to the center, while if l > 0, it can either fall to the center or follow a hyperbolic trajectory. For k > 0, with l = 0, the trajectory is hyperbolic, and with l > 0, it can also be hyperbolic or fall to the center. Circular orbits are not feasible in this potential due to its lack of symmetry, leading to only hyperbolic or falling trajectories being stable. The discussion highlights the complexities of orbital mechanics in non-standard potentials.
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Assume energy greater than 0.
Consider cases in which k is either + or - and l is either 0 or +.


Using your tuition, what are the possible orbits?


k<0:
l=0: falls to the center
l=+: hyperbola or it falls to the center

k>0:
l=0: hyperbola
l=+: hyperbola or it falls to the center

what about circular orbits?
 
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In this potential, circular orbits are not possible since the potential is not symmetric. The only possible stable orbits are hyperbolas or falling to the center.
 
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