Thanks for sitting around.
This was a good lunchbox, I guess.
Today I want to talk about experiments that I did in the last few weeks or so.
And let's recap what we did in the last few.
So we studied the basics of optical
and magnetic band structures and then we did similar, we looked at the acoustic wave equation
and saw similar structures created for some media.
And discussed the differences and last time we looked at band structures of structures of geometries
which have simultaneously photo-optalized thermon and proponic characters that are shielded by using periodic crystals as mirrors.
And discussed defects and coupling and co-creation things.
So today I'm going to tell you about two approaches to marry things with microwaves and why I wanted to do this.
One is just to capacitively couple to a photonic crystal which can move.
And the second approach is to capacitively couple with small slots to an actual automatic.
And I'll present some results here and where we're going and I'll present some results here.
And yeah, these are the last questions I'm going to get.
I'll go quickly here, you've seen it already.
I wanted to microwave some of these structures because I believe we can build a new software for the future
which in the long term could allow us to do quantum networking into superconducting qubit quantum processors essentially.
And this in contrast to the other approach is this is what we want to check.
Which usually will give you a higher bandwidth which is important but it also right now has a lot of challenges
starting with materials and losses.
I can get a model of that which is pretty good.
The other motivation is to look at high frequency mechanics.
High frequency mechanics is really interesting because it's a non-state without cooling.
So we can think about using it as a memory element or to do some interesting tasks.
With a mechanical code in the ground state without that it could cool the memory.
And we have qubits available in this domain so we can generate interesting states.
This is a little bit along the lines of what it does with its getit electrics which couple really well.
This is more along the lines of what Conrad does.
It's just a chip based approach.
I already mentioned some problems.
Materials can be lossy.
I did an office work on it and it works in both.
The fact that it's really complex is something to experience.
There is a natural seismic stretch.
Microwave systems are really big.
It will be heating and potentially the optics will use this quality product.
Let me start by explaining how we do this guy.
The networked optical conversion.
Basically this is an experiment that has been done in an Oscar's group.
It's a scheme that has been suggested by a couple of people in the past.
It has been done between two optical modes.
That will later on demonstrate this experiment between two micro modes.
But in the long term what I want to do is have an optical fiber coupled to an optical cavity
coupled to a mechanical element, coupled to an LTE oscillator, coupled to a coax.
How can you bridge this energy difference?
You work in this geometrically enhanced machine where you apply a pump tone
both on the microwave side and you apply a pump tone in the optical domain
close to your optical resonance with the laser beam.
Also using a mechanical frequency you can linearize the two parts.
Presenters
Johannes Fink
Zugänglich über
Offener Zugang
Dauer
01:31:20 Min
Aufnahmedatum
2015-08-26
Hochgeladen am
2017-05-02 21:05:24
Sprache
en-US
Johannes Fink (Institute of Science and Technology Austria)
“Les Houches Summer School 2015 on Quantum Optomechanics and Nanomechanics”
(Organizers: Pierre-François Cohadon, Jack Harris, and Florian Marquardt)