Giarond's

There is a question prepared for everyone before the presentation in the room.

Let's have another plgi, we're pretty sure there will be some audience here.

Yes, ma'am?

Whatever you would like to know.

But anyway we like to turn here to this class and you all if you have to leave anytime in

a room, how you actually, how you guys stay hungry, remember that question它在哪?

This is almost your floor.

Right behind the blackboard.

Incidentally going to repeat the earlier instructions again to do the superior

given the

We started a series of lectures just writing down

a simple electrical circuit, an inductor-to-capacitor

resonant circuit with a mechanic-compliant or

ruleable capacitor, wrote down classical

liberalogy of the next, quantized it,

wrote down equations of motion, and then we

managed exciting or driving out-circuit,

with a simple, intense, coherent microwave tone,

found static solutions to our abrasions of motion

and the presence of ender on, then linearized,

and then had been solving those abrasions

of motion at various limits.

In particular, sort of encouraged

the perspective of staying with the time domain a little bit.

And in that way, we worked out that you could turn on and off

that intense microwave drive in such a way

that you would swap the state of the circuit

and mechanical oscillators.

Or if you turned on the same microwave drive suddenly,

but not as intensely, you could think

about catching a propagating microwave field that

was running through a transmission line

that coupled to the microwave circuit and releasing it.

And I kind of missed the punch line of last lecture, which

was simply to say that we were doing a kind of peas-matching.

We were ensuring that there was a microwave signal incident

on our circuit which wasn't reflected.

In that sense, it looks like impedance matching.

But it's a kind of impedance matching in the time domain.

And in fact, at some level, I'm an electrical engineer.

Cut me open, count my rings.

One of those rings is clearly an electrical engineer.

I like the concept of impedance.

But I think impedance matching is kind of a stone.

It's really something about rate matching.

It's matching the rates at which energy scatters

to and from degrees of freedom.

That's what impedance matching ends up being.

And so in the time domain case, what we were doing