Wavelength of matter wave at v=0

[Amal George M]

if velocity of a huge particle is made zero what will happen?? will the particle spread out into the universe aka complete delocalization??

 

[mfb]

You cannot make it exactly zero for this reason.

 

[Drakkith]

Does this fall under the uncertainty principle?

 

[bhobba]

Does this fall under the uncertainty principle?

I think its more that states with a definite momentum have a wave-function that that's not normalisable ie doesn't fall off at infinity hence is not physically realizable.

Although zero momentum poses the added complication its at rest ie stationary so it has both known momentum and position which is not possible via the uncertainty principle.

Thanks
Bill