Question

Explain ( Soliton, Polaron, Bipolaron, Excition )

Answer 1

1. Soliton is a Self reinforcing wave packet, which remains its shape when it propates at consant velocity which are caused by cancellation of non linear and dispersive effects in the medium.

2. Polaron is a quasi particle to understand the physics of interactions between electrons and atoms in solids.

3. Bipolaron is a particle which has two polarons

4. Excition is a bound state of electron and electron hole which are attracted due to electrostatic forces..