Active QM Topics: What's Hot Now?

[edpell]

What are the active questions/topics in QM?

 

[Fyzix]

I would say the whole field is pretty active.

Quantum computing
The interpretational debate has no end in sight
Quantum gravity

 

[cgk]

There are also all the applied quantum mechanics topics, especially quantum information, electronic structure theory and other the topics in theoretical solid state physics and quantum chemistry/molecular physics/optical physics. These ones are still as alive as on the first day.