Let me introduce some of mine:
1- Reach quantum gravity for introducing this interaction into the quantum field theory and probably to be unified with the other three interactions:electro-weak-strong.
2- Find an extension of the many-body theory for solving DFT (density functional theory) for excited states and to finite temperatures.
3- New physical properties for joining materials as topological insulators and thermoelectricity.
4- Quantum entanglement and informatics.