And he was the first experiment to come up with a microresonator to a micro-element.

It was a BBC.

Until now he runs a group in London where he's involved in co-appliances with microresonators.

Thank you very much for setting up this wonderful school and for the opportunity to talk a bit about our research.

As I mentioned, my background is in co-appliances but some years ago we also started to get interested in optomechanics activities

and in hyper-systems and other mechanical devices.

In some sense you can also think about the entire field of co-appliances of course as being started and driven by optomechanics

because after all laser cooling and tracking is what made this field big and what still drives it today

like improvements in the tracking and manipulation technique of neutral atoms with laser lights.

So there are many connections.

The title of my lecture is Atom Optomechanics and I understand this title in two ways and we'll discuss more related subjects.

One is of course you can think about the atoms as being a mechanical element that you can insert in a cavity

and then realize a cold atom version of optomechanics where instead of, for example, putting a membrane here,

inside a cavity you put an atom or a cloud of atoms that is trapped and that interacts with the light field.

And there are many analogies between this type of atom optomechanics and optomechanics with membranes or

dedicated nano-objects or moving mirrors.

But there are also some interesting features in this atomic implementation because the atoms,

using the standard technique of laser cooling, can be really prepared deep in the quantum machine.

And so one part of my lectures will be dealing with the optomechanics of atoms.

The other thing which you can understand this title is optomechanics of atoms coupled to mechanical systems via light.

And this is kind of illustrated here.

This is a picture from one of our experiments where we have a membrane in the middle of the mechanical setup

and we let it interact via the laser light that exits this cavity with a cloud of atoms that is trapped in an optical lattice.

And in this setup you get an interaction between the micro or nano-structured mechanical element and your cloud of atoms.

And this hybrid form of optomechanics is the second part of my lecture that I will be talking about.

That's a new feature that the atoms can add to the system.

My own group works at the University of Basel in Switzerland.

We do experiments mostly.

But I would also like to acknowledge the theory collaborations we had in the past on the subjects,

especially these hybrid subjects.

And in particular I would like to point out that a lot of the things we're doing have been inspired by the work of Raymond Samo and Hannover

and Hitler's color school and what they did there in Innsbruck.

Before I start my lecture, let me give you a bit of introduction and motivation.

So the reason why cold atoms are interesting for quantum experiments and also in this context is because we have a very sophisticated toolbox

for controlling these atoms on the quantum level.

And this toolbox largely relies on laser tracking, cooling, and manipulation techniques,

which were developed in the cold atoms field since the 1980s.

So we look back on more than 30 years of development of these techniques.

It's still going on. People are still coming up with new ideas,

most recently, for example, the single-site resolution of the forces to obtain ever higher control over these atomic systems using data.

And so let me just give you a brief overview of what we have in this toolbox.

For one thing, we have techniques to compare atoms in a very well-defined quantum state.

So we started with optical counting, which allows you to initialize atoms in a pure intermagnetism.

So you count them into one magnetic sub-level of the ground state hypotonic structure,

and all of the atoms are in this very same state with a very high intensity.

Then in the 1980s, people developed these laser-cooling techniques, which give you control over the motion of the atoms.

So using these techniques, as well as techniques of Bose-Eichstein condensation,

you can prepare an entire cloud of atoms with thousands or even millions of atoms in the ground state of potential.

So ground state cooling is very well established even for large ensembles.

So this essentially means you can prepare all degree of freedom of the atom's own internal state,