A quantum or quasiparticle propagated as a travelling non-dissipative wave which is neither preceded nor followed by another such disturbance.
- Paolo Di Trapani of the University of Insubria in Como, Italy, and his colleagues, came up with a pulse shape that combines attributes of both solitons and linear X waves.
- And because atoms have weight - unlike photons - solitons respond in an easily measured fashion to gravity shifts.
- Though the depression solitons were eventually damped by viscosity, they maintained the shape and velocity required by the standard soliton equations as they traveled across the channel.
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