Showing posts with label space time. Show all posts
Showing posts with label space time. Show all posts

Friday, January 06, 2012

Experiment Succeeds in Hiding Object in Time

Wow, forget about just hiding under an invisibility cloak.
Yep old news! In an article in Nature: Scientists have successfully hidden an object in both space and time. That is right, that second word is time. Think about it....any thing put in this device, for a moment in time, does not exist. That send the creepy crawlies up the spine? Next question is how de do dat? Right? Ok, so, from the article:

  • The technique relies on what's known as a split-time lens to create a temporal hole. A beam of light is pushed through the lens, which speeds up the travel of the fast moving blue light, and slows down the comparatively sluggish red, leaving a gap in the middle — a gap ripe for exploitation. The light is recombined on the other side, and for a window of trillionths of a second, whatever goes on in that gap is undetectable.
Whatever is in the gap should react with the light right?  Nope....nada, nichts, nothing.  The light come out of the device as it went in, none the worst for wear,  so for a fraction of a second, our temporal traveler was just not there. 

Friday, June 17, 2011

Dark Energy is Fiction - Time Itself is Leaking Away!

Talk about a subject that is going to polarize discussion! Dark energy has been the darling child of astronomical physics for the better part of the last decade and now some researchers are calling it little more than junk science? This can not be going well for proponents.

But the question still has to be, if there isn't any such thing as Dark Energy, then what is pushing the universe apart at an ever increasing rate. Well me hearties tiz something right out of science fiction. Time is Running Down.

From the Daily Galaxy article:
  • The idea that time itself could cease to be in billions of years - and everything will grind to a halt - has been proposed by Professor José Senovilla, Marc Mars and Raül Vera of the University of the Basque Country, Bilbao, and University of Salamanca, Spain.
  • They propose that there is no such thing as dark energy at all, and we’re looking at things backwards. Senovilla proposes that we have been fooled into thinking the expansion of the universe is accelerating, when in reality, time itself is slowing down.
Wow, what a way to get the skull jello wigglin huh? But think about it - distance, speed and age all have time constituents and for the most part, C is constant because of T(time) if you have to start factoring in a delta v for time things get really squirreley! (oh and don't call me out on delta v for time, you know what I mean...sheeeeeeeesh!)

Anyone remember Exhalation by Ted Chiang. It was originally played on Star Ship Sofa and I replayed it (I loved the reading that they had done so I asked to use that!) anyway Ted's story was about beings that powered themselves with compressed air, but found that their vacuum environment was being normalized and since there was less power potential the people were slowing down ever so slowly. Chiang nailed the present theory several years ago!

Ok, well I drifted off track some. As the present expansion theory explains, since light is redshifting from distant galaxies and the more pronounced the red shift the faster they are receding, hence the universe is expanding at an ever increasing rate. However as the article points out:
  • the accuracy of these measurements depends on time remaining invariable throughout the universe.
  • If time is slowing down, ... our solitary time dimension is slowly turning into a new space dimension. Therefore the far-distant, ancient stars seen by cosmologists would from our perspective, look as though they were accelerating.......
Wild huh?

Read the rest of the Daily Galaxy article here


Tuesday, February 16, 2010

Is the Universe a Giant Hologram?

Well here is something to twist your head sideways. From NewScientist is an article that describes some startling conclusions about the makeup of space/time from scientists involved with the GEO600 experiment. This experiment, for the last 7 years, has been looking for gravitational waves, ripples in space-time thrown off by super-dense astronomical objects such as neutron stars and black holes, but has been unsuccessful. But now, here is where it gets weird.... you see for quite a while, the scientists running the GEO600 experiment have been inexplicably plagued by noise. This noise, according to Craig Hogan, a physicist at the Fermilab particle physics lab comes from the fundamental limit of space-time - the point where space-time stops behaving like the universe Einstein described and instead dissolves into something akin to pixels.

Hogan said:
  • "If the GEO600 result is what I suspect it is, then we are all living in a giant cosmic hologram."
As absurd as this sounds, it has gone a long way towards helping scientists studying super massive objects like black holes answer some pretty vexing questions of how the universe works on its most fundamental levels.

The article over on New Scientist really goes into great detail and is an excellent read, you really should go Here to read more. Worth your time for sure.