Adam Brown

Most physicists would be pretty surprised if it turned out that you could.

That is a tricky one.

That is a really tricky one.

It's only a century that we thought you can't communicate faster than the speed of light.

A million years is such a radical time that maybe we've sort of dissolved the question into some greater question, and we understand it doesn't even really make sense.

I would be pretty surprised if you make me make a number.

I think that there is a...

Greater than 90% chance that in 100 years we are still limited by the speed of light.

There's a 98% chance, if you make me be precise.

Energy limits.

We've talked about the efficiency of batteries and extracting energy.

You know, MC squared is the...

I'm highly confident that the most energy you can extract from a given piece of matter is mc2, at least until you start getting cosmology involved.

Other limits will be Landauer's limit, or in other words...

With a given amount of energy, how useful is a given amount of energy to you?

We wouldn't care about having huge amounts of energy if you could get an arbitrary amount of value out of a fixed unit of energy.

We think that that's not true.

We think that in particular, if we're going to do computations with it, for example, that there's going to

and that computation makes errors, that there is a fixed cost of a bit, basically a bit of free energy, in order to correct those errors.

It is a very interesting question what the fundamental limits on errors are in a computer.