Deanna can't help but smile at his enthusiasm. He reminds her a little of Geordi. And much like with Geordi, she doesn't quite follow all the technicalities of what he's saying. Alcubierre is an unfamiliar name (though she does recognize at least that it's a human Spanish name) and she's never heard of the mass effect or eezo either.

She waves a hand dismissively at the art. That's clearly not what he wants to be talking about. "Forget about that. Tell me more about what you were saying - what's the mass effect?"