It is all about me!
you have nothign to prove, except theorems


 
Soundtrack:

It is all about the soundtrack in your life.
The one that plays while you act on life's stage.
Po wered by WordPress

-->

August 29, 2007

Done

Filed under: Quantum Information, Graduate Life — ivan @ 3:24 am

Patrick Mineault says: 10:09 pm (12 hours ago)

It is d^o^ne done. You are now officially off the hook.
Enjoy Bulgaria and Bulgarian girls, and don’t forget you owe me 2 hours of
my precious time and 45$ worth of booze.

Could this really be happening?
I don’t think anything can go wrong right about now. It has been submitted, it is of decent quality, it will be accepted, I will be crowned the master of science. All is fine that ends fine.
I remember walking around on the beach in Barbados and saying to myself the first time (March 2006) how only good things are to come with high expectations for the coming second year.
This year (March 2007) this feeling was mixed with guilt over the paper that wasn’t written still. I kind-of got scooped by 0704.2236 but then again they had done the work — perhaps it is better this way.
Still, if I had published closer to their date of publication it would have been cleared that this is independent work.

I am a bit pissed off that I couldn’t come to any conclusion about the multiparty information and its operational interpretation.

<br />
I(A;B;R)=H(A)+H(B)+H(R)-H(ABR)<br />

This measures how different from independent the three variables are.
Well, if they were independent then this quantity would be zero.
The interpretation I like better is: Twice the amount of quant. comm. necessary for any A and B to decouple from the reference (by independent communication to Charlie).
So why twice the amount?
If Alice and Bob were allowed to meet and work together then they should be able to accomplish the task at cost:
 Q_A + Q_B \geq H(AB) = \frac{1}{2}I(AB;R).

what is the difference?
How much more communication is necessary if they are working separately?
<br />
   \frac{1}{2}I(A;B;R) - \frac{1}{2}I(AB;R) = \frac{1}{2}I(A;B).<br />
That is interesting — it means that the same quantum information requires more communication to be transmitted when sending it in pieces.
In general, if there are  m parties then the extra communication necessary would be  I(X_1;\cdots;X_m) .

Again — the multiparty function comes into play!

On the other hand, if AB are completely decoupled from R then this should be possible with cost
0

.

Which kind of makes sense with

MSG:
http://video.google.ca/videoplay?docid=-2384105525501310962

Looks at what is left:
\calendar[2007,8]\qquad\calendar[2007,9]


August 18, 2007

Saturday

Filed under: Uncategorized — ivan @ 2:32 am

Добро начало за един ден. Добринка сутринта, банички и сега ме чака едно капучино. Има нет. Имам желание да пиша за черните дупки.
Хайде някой да се опита да ме спре.


August 14, 2007

Writing, writing, writing

Filed under: Quantum Information, Graduate Life — ivan @ 10:08 am

Productivity has been high lately. It better be, since the deadline is looming.
Right now nearly, the “Background” chapter is almost cooked and the “results in QIT” chapter has only one hole in it. See for yourselves: Thesis (early draft).

It is way too hot in this place for my brain to be functioning properly still I persist.
Today, I will finish these two chapters and send them to Omar and Frederic respectively.
Let’s hope they will find the time to read them before Patrick comes back !

Other than that there is a party going on tonight on the other side of the bridge, in Възрожденци. I’ll probably get very very drunk because I deserve it!


August 9, 2007

9AM - Thesis time

Filed under: Graduate Life — ivan @ 2:02 am

This is it.
I have finally managed to get up early and found the right working conditions:
Kurdjali Office

I have a little bit of “quantum resources” section to write and then the “results in QIT” chapter.
I have read what I have so far though and it is good….

Let’s go !