Mid-morning. Paul is at the hospital and the
boys are off at school. You talked to Kim last night and she will be flying
home today via Denver, Dallas to Columbus. You have lunch today with Mary Lou,
Gayle and Ralph. Paul should be home between four and five; Papa John’s pizza
for supper. Paul will pick up Kim from the airport late tonight. Today you hope
to do some writing and I suggest we just start in with what ‘facts’ you have available
on the desktop and go from there. – Amorella
1807 hours. I read this article on
Eureka. I cannot imagine how this will be useful science even in the near
future; very cool.
** **
Breakthrough in light sources for new
quantum technology
Electronic circuits are based on electrons, but one of the most
promising technologies for future quantum circuits are photonic circuits, i.e.
circuits based on light (photons) instead of electrons. First, it is necessary
to be able to create a stream of single photons and control their direction.
Researchers around the world have made all sorts of attempts to achieve this
control, but now scientists at the Niels Bohr Institute have succeeded in
creating a steady stream of photons emitted one at a time and in a particular
direction. The breakthrough has been published in the scientific journal Physical
Review Letters.
Photons and electrons behave very differently at the quantum level. A
quantum is the smallest unit in the atomic world and photons are the basic
units of light and electrons of electrical current. Electrons are so-called
fermions and can easily flow individually, while photons are bosons that prefer
to clump together. But because information for quantum communication based on
photonics lies in the individual photon, it is necessary to be able to send
them one at a time.
"So you need to emit the photons from a fermionic system and we
do this by creating an extremely strong interaction between light and
matter," explains Peter Lodahl, Professor and head of the research group
Quantum Photonics at the Niels Bohr Institute at the University of Copenhagen.
Photon canon
The researchers have developed a kind of single-photon cannon
integrated on an optical chip. The optical chip consists of an extremely small
photonic crystal that is 10 microns wide (1 micron is a thousandth of a
millimeter) and 160 nanometers thick (1 nanometer is a thousandth of micron.)
Embedded in the centre of the chip is a light source, a so-called quantum dot.
"What we then do is shine laser light on the quantum dot, where
there are atoms with electrons in orbit around the nucleus. The laser light
excites the electrons, which then jump from one orbit to another and thereby
emit one photon at a time. Normally, light is scattered in all directions, but
we have designed the photonic chip so that all of the photons are sent through
only one channel," explains Søren Stobbe, Associate Professor of the
Quantum Photonic research group at the Niels Bohr Institute.
Peter Lodahl and Søren Stobbe explain that it not only works, but also
that it is extremely effective. "We can control the photons and send them
in the direction we want with a 98.4 percent success rate. This is ultimate
control over the interaction between matter and light and has amazing potential.
Such a single-photon cannon has long been sought after in the research field
and opens up fascinating new opportunities for fundamental experiments and new
technologies," they explain.
The two researchers are
in the process of patenting several parts of their work, with a specific goal
of developing a prototype high-efficiency single-photon source, which could be
used for encryption or for calculations of complex quantum mechanical problems
and in general, is an essential building block for future quantum technologies.
It is expected that the future's quantum technology will lead to new ways to
code unbreakable information and to carry out complex parallel calculations.
From:
http://wwwDOTeurekalertDOTorg/pub_releases/2014-08/uoc--bil082814.php
** **
1856
hours. We had Papa John pizza tonight. Very good! I completely forgot I had
finished Grandma 4 while we were at Barnes and Noble at Polaris after lunch.
Then we drove to Westerville and had Graeter’s. Carol had two regular scoops
and I had a chocolate soda with three squirts of chocolate the way they used to
make them in the 1970’s. Today they only put in two. One more squirt makes all
the difference if you know what a real old fashion Graeter’s chocolate soda is
supposed to taste like – two scoops of ice cream too. I always choose chocolate
mint, but to each [their] own.
You have been looking over Pouch Four and
have a selection that you feel is very important but to use it changes the
format of the story or it appears to do so in your mind. – Amorella
The
selection is about the social rules on HomePlanets.
Begin with the ten greater social rules though
you are hoping to avoid. – Amorella
2059 hours. I am having trouble
concentrating tonight. Perhaps tomorrow once we return home. The boys are in
their bath and Paul is leaving for the airport about ten-thirty. It will be
good to have Kimberly home. We can’t wait to hear about her reactions to the
trip as a whole and the business model in specifics.
Pouch
4 is going to be a special challenge. I don’t want Friendly to be didactic and
neither does she. Really, the challenge is hers not mine. Surely she would have
a plan that Hartolite and Yermey also agree with. What about Ship? How would
Ship deal with this? The Earthlings have a right to know what to expect in
socially living with real life marsupial humanoids.
Post. - Amorella
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