Lena Hau's laser experiments

This is an addition to a reference for an article I wrote on my website. I'm sorry, I forgot where it comes from but I have pretty good idea that it's from BBC Horizon ' Parallel Universes': It's meant to clarify a section of the ending of the video from PBS; 'Absolute Zero' where Lena Hau's experiment is placed anticlimactically which I thought was unfair. I found additional footage that really explains the experiment very well and decided to place it there.

This is embedded on my website on my History of Thermodynamics entitled HTML'S MAGIC: 'Extreme Cold' Part 3

For Fair and educational use

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  Education

[Steven K]

The photon doesn't warm the cloud?

[MrSilvestris]

A good question because you know that light is actually heat and this is not covered properly in modern day Thermodynamics, which only concerns itself with mostly energy and not matter and in this video we find a goody within the Third Law.

Light is also massless matter.

The Zeroth Law of Thermodynamics is where the answer is. In the Zeroth Law, heat, information and mechanical work can by many things, arising from many forms but always as part of some equivalent system.

500 character limit.

[jm8080ful]

Why do they need to expand it again to it's original speed and size?

If they can already made it stop why do they need to get it moving?

[MrSilvestris]

This is important for storage and retrieval of information that would be contained within the light itself.

Abstract: It's a big problem to find new ways to store and retrieve information because even the latest memory technology can easily be overwhelmed. This you'll find is a concern of many disciplines and study, including Quantum theory, Relativity and Thermodynamics, you name it. There are many philosophical ideas that are also affected. Your question has more meaning than my answer.

[Fano Munoz]

I read a few years back that there was something traveling faster than the seed of light in an article about a Russian scientist. Later when I was on vacation in Costa Rica I quickly overheard the news about a scientist also Russian(probably the same guy) which had found some type of particles(don't remember exactly) that were always a few split seconds present before light had reached. The reason I brought this up is when I heard Doctor Hua saying nothing travels faster than the speed of light

[MrSilvestris]

You are probably referring to the Opera experiment which turned out to be in error because of a bad wiring in their apparatus - they say. Check: ' Faster-than-light neutrino anomaly' in Wikipedia

As for things that are "superluminal" it is probably possible at 'Beyond Gamma ray' energy levels that creates its own hyperspace where its relative curvature would allow for this. Relativity is still obeyed, it is only the curvature that is different at certain energy levels. and intensities.

[Ybidzian]

To transmit information.

[AlloBruxelles]

OK, I "got it"... just read the article... information is transferred through conversion of the optical pulse into a travelling matter wave; so that answers my question