Let's check this one now.

which means we have the...

Just make sure it's not the only one.

So today's seminar speaker is Jess Riedel.

Jess received his PhD degree from the University of California Santa Barbara

in the strength of life, and she's headed the project to a different place.

And she did a postdoc at IBM, your campus,

at Charlie Bennett, who was one of the founders of physical computing and quantum computing,

and is now at the Kermiter Institute with afar more than a half way.

Alright, yeah so, negligible method of transverse and anomalous disappearance.

The question is can we detect dark matter in now mechanical resonators?

Since the joint work with Ita Yevin, who's a kind of particle theorist at Krimmer,

of course, probably you all are familiar with this.

So if you ever have a question on the end of a paper type or a headline, it's usually no.

And I'm not really going to disappoint on that front.

The punchline is going to be that these nanocannabinomresonators are unlikely to compete with matter interferometers,

unless you get really unusually large-scale appearance.

It doesn't look to be right around the corner.

Okay, so you know, if you've talked to me you probably realize I'm not an opium mechanics person at all.

I don't know anything. I don't really know what my lip means, you know?

So I kind of come from work on the foundation stuff, and I'm going to just try to connect a few of these particle physics ideas.

This is all speculative stuff, but I think it's pretty fun and it can be exciting.

Okay, so just quickly outline where we go with the talk.

So I'm going to first do this kind of initial motivation.

I love these bowling balls and coupon balls.

I'm going to introduce a new kind of standard quantum limit for detecting diffusion and decoherence.

And then I'm going to talk about what kind of searches you would do, searches for new physics, using decoherence-based methods.

And so in particular, it's going to be all about tiny momentous transfers, interactions that are soft but not weak.

And then I'll talk about just one candidate you can play around with, which is a species of dark matter particle.

We know very little about dark matter right now, but we're going to talk about one where we interact with some heavy photon-like meteor.

And so if the dark matter were like this, I'm going to sketch with this for matter interferometers and nanomechanical resonators.

And then I'll give you a little intuition about why these things work or don't.

Okay, so here's the cartoon introduction.

Suppose everything in the universe, including us, were all made out of big, heavy bowling balls.

But we were surrounded by this sea of slowly moving ping pong balls.

All of our equipment was made out of bowling balls.

We're walking around and we're knocking these ping pong balls out of the way.

And the question is, could we ever tell?

Is it possible to influence the bowling balls and knock them out of the way without actually being influenced ourselves

and therefore having to see anything show up in our experiments in the micron?

And more generally, what are the kind of limits for experimental physicists for identifying the sectors of the universe to which we are being coupled?

There's all sorts of different candidates that people are excited about with varying degrees of motivation.

So, oh man, I can't even remember.

It's at the bottom because it's one of the weirder ones.

It fulfills some particle physics symmetry.

There's no reason to sleep in it.

Okay, now I'm going to just kind of go over this traditional standard quantum limit you guys have all seen and known before.

But I'm going to just talk about it just slightly differently and so to connect it to how I think about it.

So anyway, so you know, it's this idea you want to measure a weak force for in some particular time interval, T acting on a probe of some mass.

So for instance, the gravitational waves that we've heard about today.