I've received an offer to work my master's thesis on an approach to black holes with quantum information. In that setting, before accepting, I'm trying to understand what this is all about really, since I know nothing yet of quantum information.
At first I thought that quantum information was somehow related to statistical mechanics because of dealing with things like entropy.
But searching more about this, it seems it is almost entirely about quantum computing. It seems to deal with circuits, gates, bits, and lots of other stuffs that seem at first to be extremely quantum computing related. And it seems to be extremely focused on more "practical issues" of quantum computing instead on, what I personaly find more interesting, issues of fundamental physics.
To make my point clear, I mean, Quantum Mechanics allows us to understand the dynamics of atoms and subatomic particles. Quantum Field Theory allows us to understand the dynamics of relativistic fields and treat these phenomena as the interactions of relativistic particles. Statistical Mechanics allows us to understand how macroscopic degrees of freedom are related to microscopic ones and make sense of how temperature, for example, affects systems. General Relativity gives us a description of spacetime itself and the interaction between spacetime and matter.
I'd say that all these seem to be concerned with "how nature works and how those phenomena we observed actually can be described".
Now, quantum information is just concerned with quantum computers, bits, and things like that?
I do understand all this is important and I'm in no means disputing this. I just don't like quantum computing (I tend to prefer more abstract mathematical-physics problems), and I'm trying to understand whether or not quantum information and quantum computing are the same thing.
It is just that I have a feeling that although the heavy usage of quantum mechanics is physics, the objectives themselves of quantum information, are closer to computer science than to physics.
My current impression is that quantum information is a particular usage of physics to achieve practical results. But it might be wrong, and that is the reason of this question.
What is quantum information really about? How does it fit physics in general? Is it really majorly related to quantum computers or it tries to answer question from fundamental physics?