Bose-Einstein condensate created at room temperature

Vortex-L ^ | Feb 6 2013 | Axil Axil

[Kevmo]

RE: [Vo]:Bose-Einstein condensate created at room temperature

Jones Beene Thu, 07 Feb 2013 11:13:22 -0800

Yes they can. In fact this could be important for LENR, should it be broad enough to include other boson quasiparticles, such as the magnon.

The definitions are similar: polaritons are quasiparticles resulting from strong coupling of electromagnetic waves with an electric or magnetic dipole-carrying excitation. The magnon could be imagined to be the subset of that - where the coupling is only magnetic. However, it may be only a partial subset with other features included.

Polaritons describe the dispersion of light (photons) with an interacting phonon resonance; while the magnon would describe the dispersion of spin current with an interacting resonance.

Using the same general terms, superconductivity where the Cooper pair is the boson, would describe the dispersion of charge within an interacting phonon resonance. (the last is my interpretation, which may not be correct).

Thus we have a linking of three BEC phenomena which may happen either at room temperature or close- in the case of the RTSC. From: Axil Axil

-------------------------------------------------------------

http://arstechnica.com/science/2013/02/bose-einstein-condensate-created-at-room-temperature/

Bose-Einstein condensate created at room temperature

-----------------------------------------

Can those interested in LENR draw any lessons from this formulation?

Cheers: Axil

--------------------------------------------------------------------------------------------------

Excerpt of Arstechnica article

Bose-Einstein condensate created at room temperature

Instead of atoms, condensation was achieved using quasiparticles.

by Matthew Francis- Feb 6 2013, 9:15am PST

Physical Sciences 27

Aluminum-Nitrogen nanowires, relatives of the ones used in these experiments.

NIH

Bose-Einstein condensation is a dramatic phenomenon in which many particles act as though they were a single entity. The first Bose-Einstein condensate produced in the laboratory used rubidium atoms at very cold temperatures—work that was awarded the 2001 Nobel Prize in physics. Other materials, like superconductors, exhibit similar behavior through particle interactions.

These systems typically require temperatures near absolute zero. But Ayan Das and colleagues have now used a nanoscale wire to produce an excitation known as a polariton. These polaritons formed a Bose-Einstein condensate at room temperature, potentially opening up a new avenue for studying systems that otherwise require expensive cooling and trapping.

Bosons are part of a large class of particles that can have the same quantum configuration or state. This is in contrast to the fermions, the category including electrons, protons, and neutrons, which resist having the same state. (This resistance, known as the Pauli exclusion principle, leads to the presence of different energy states, or orbitals, occupied by the electrons of atoms.) At extremely low temperatures, bosons can coalesce into a single quantum system known as a Bose-Einstein condensate (BEC), named for Satyendra Nath Bose and Albert Einstein.

Many atoms are bosons, though this characteristic doesn't generally make any difference except at high density or very low temperatures. However, thanks to the wonders of quantum physics, interactions within materials can produce quasiparticles. These are excitations that act like particles, but don't exist independent of the medium in which they occur.

As with normal particles, quasiparticles are either fermions or bosons, obeying the same general rules as their free cousins. For example, one widely accepted model for superconductivity describes the phenomenon as a Bose-Einstein condensation of quasiparticles formed by pairs of electrons. As with atomic BECs, quasiparticle BECs tend to form under very cold temperatures.

Another quasiparticle can be formed by the interactions between photons and excitations in a material. The resulting polaritons are low-mass bosons that should be able to condense at higher temperatures—possibly including room temperature. One signature of a polariton BEC is the production of coherent light—effectively, the quasiparticles act like a laser. Several experiments have created polariton BECs, though still at relatively cold temperatures.

The current study embedded a very thin wire—a nanowire—in a cavity designed to produce standing waves of microwave photons. The nanowire was an alloy of aluminum, gallium, and nitrogen, but with varying amounts of aluminum. The irregular composition created a de facto "trap" for the polaritons. A wire of uniform composition couldn't form a BEC—fluctuations within the material would destroy the condensation, even at low temperatures.

To bypass this, the researchers gradually decreased the amount of aluminum in the alloy to zero in the center of the nanowire, then bookended the aluminum-free segment with a region containing a relatively high amount of aluminum. The microwaves from the cavity interacted with the material, generating polaritons. These drifted preferentially along the wire toward the aluminum-free zone, where they collected and condensed.

In other words, the electronic properties of the material itself replaced the need for cooling, allowing the quasiparticles to gather and condense into a BEC. The experimenters confirmed this effect by detecting the telltale light emission.

This experiment marked the first room-temperature BEC ever observed in the laboratory. While the authors didn't suggest any practical application, the potential for studying BECs directly is obvious. Without the need for cryogenic temperatures or the sorts of optical and magnetic traps that accompany atomic BECs, many aspects of Bose-Einstein condensation can potentially be probed far less expensively than before.

[Kevmo]

I see you aren’t going to lock horns with real physicists, just pedestrians. It’s clear that your own emotions are involved in your decision. Best of luck with that. Perhaps you could take a refresher course on critical reasoning so you won’t get so wrapped around the axle using classic fallacies.

[Kevmo]

You again, ho hum. Has there ever been a lurker who said that your claims or objections were even once worth pursuing? Nope. But thanks for bumping the thread, again. And again, no, you will not be put on the LENR ping list.

[Moonman62]

Has there ever been a lurker who said that your claims or objections were even once worth pursuing?

That's a Catch 22. If someone like Fred posts and makes you look horribly ignorant and childish, then he is no longer a lurker.

[Kevmo]

Given your own admitted shortcomings in physics, why should we trust that your judgement of someone else’s critical thinking is any better,
***You’re none too bright. Critical thinking is a Freshman level college course, REQUIRED for all grads now, for the most part. Fred’s a physicist, which is an elective set of courses that not everyone takes, and is obviously higher level than a required freshman level class. If someone shows lack of critical thinking skills, their physics judgement is open to question. And you don’t have to trust me, you can trust yourself. If a person asks a question and the answer (by some superduper physicist) does not answer the question but sets up a straw question to answer, it is simply straw argumentation. The fact that you cannot see it does not surprise me. But for you to think that a person’s physics subsumes the critical thinking requirement is so incredibly ignorant that it’s beyond the pale. If that were true, Calculus-based physics would be the requirement for college freshmen to graduate and critical thinking would be the elective. Once again, you’ve got the whole world turned upside down.

Thanks for bumping the thread, yet again.

[Kevmo]

So what I do is name calling, but when you do it... perhaps it’s considered something else, in your Alice-in-Wonderland perspective.

[Kevmo]

If. Don’t worry, that conditional event won’t be happening any time soon.

There’s never been a lurker on these LENR threads who thought your stuff was worth pursuing. Never. Does that mean your junk isn’t worth pursuing? Well, yes, but it was not worth pursuing before we ever had this indicator from lurkers anyways.

Thanks for bumping the thread.

[Moonman62]

So what I do is name calling, but when you do it... perhaps it’s considered something else, in your Alice-in-Wonderland perspective.

I withheld until the moderators put your thread into the Smoky Backroom for your name calling. You still have me beat 10 to 1 at least.

[Moonman62]

If someone shows lack of critical thinking skills, their physics judgement is open to question.

The one who has shown lack of critical thinking on this thread in regards to the relationship between room temperature BEC's and cold fusion is you, not Fred, plus you admit that your physics knowledge is pedestrian.

I like this definition:

3. Undistinguished; ordinary: pedestrian prose. See Synonyms at dull. Link

[Moonman62]

But thanks for bumping the thread, again. And again, no, you will not be put on the LENR ping list.

Your refusal to put me on your ping list demonstrates your lack of critical thinking and ignorance of the facts, unless of course, you're just being insincere, in which case you are being childish, once again.

[Moonman62]

I see you aren’t going to lock horns with real physicists, just pedestrians.

He's locking horns with a pedestrian who is posting inaccurate conclusions about physics on FR.

[Kevmo]

Many of the things you’ve posted here are incorrect, including the very broad claim that this experiment has some implications specific to LENR. It doesn’t. I’m sorry that you don’t understand why it doesn’t,
***According to YE Kim, you’re completely wrong. Your physics knowledge does not stack up and your critical thinking is lacking. You choose to tangle with someone who’s pedestrian rather than someone who knows physics as much as you claim to, and you just lost to this pedestrian. Your claim to such knowledge is disproven; you are an impostor, as I said earlier.

See YE Kim’s email below.

Kim, Yeong E

5:24 PM (12 minutes ago)

to me, ayandas, pkb

Hi, Kevin,

Yes, the formation of a BEC of deuterons (or other Bose nuclei) makes my theory more viable.

The claim, made by some that BECs could not form at room temperatures, was based on an inconclusive conjecture

which assumes that the Maxwell-Boltzmann (MB ) velocity distribution applies for deuterons in a metal.

This conjecture was not based on any theories nor on any experimentally observed facts.

The MB velocity distribution is for an ideal gas containing non-interacting particles.

There are no justifications to assume the MB velocity distribution for deuterons in a metal.

The published paper by Dasa, et al. quoted below indicates that the conjecture is not justified.

I have stated at seminars and conferences (in the proceedings) that

“The BEC formation of deuterons in metal at room temperatures depends on the velocity distribution

of deuterons in metal at room temperatures. The velocity distribution of deuterons in metal has not

determined by theories nor by experiments and is not expected to be the MB distribution”

The published paper by Dasa, et al. supports the above statement.

Yeong

keSent: Friday, February 08, 2013 4:22 PM
To: Kim, Yeong E
Cc: ayandas@umich.edu; pkb@umich.edu
Subject: Bose Einstein Condensate formed at Room Temperature

[Kevmo]

He’s locking horns with a pedestrian who is posting inaccurate conclusions about physics on FR.
***I see you agree with me that he was locking horns with a pedestrian rather than with someone better versed in physics such as YE Kim. Why would someone have such a lack of courage, choosing such a course of action? Because it turns out he was way, way wrong. Now he’s been disproven in his physics and the lack of critical thinking skills is there for everyone to see for themselves. I was NOT posting “inaccurate conclusions about physics”, he WAS. And so are you. How does it feel to be proven so definitively wrong? Especially by someone you went out of your way to point out is pedestrian, dull... If I’m dull and you’re wrong, that makes you duller than dull.

[Kevmo]

Your refusal to put me on your ping list demonstrates your lack of critical thinking
***Um, how is that exactly? Refusing to put a disruptor troll like you on the ping list is a demonstration of healthy critical thinking.

and ignorance of the facts,
***Again, How? I’m not ignorant of the fact that you’ve gone out of your way to disrupt these LENR threads. You don’t even seem to know what critical thinking is.

unless of course, you’re just being insincere,
***How would a person be insincere about not putting you on a ping list? You’re losing it, once again, as you have in the past. Do you even think about what you write?

in which case you are being childish, once again.
***Oooohhh, name calling, the very thing you like to point out.

[Kevmo]

The one who has shown lack of critical thinking on this thread in regards to the relationship between room temperature BEC’s and cold fusion is you, not Fred,
***YE Kim begs to differ. I just bested your physics boy, and I’m admittedly pedestrian in physics. What does that make him, duller than dull? I bested you as well.

Thanks for bumping the thread. The 2 of you might consider taking a critical thinking class.

[Kevmo]

In a personal email to me, YE Kim verifies that this development gives his theory a leg up.

[Moonman62]

The published paper by Dasa, et al. quoted below indicates that the conjecture is not justified.

It's funny how Dr. Kim misspells Ayan Das's name. It's the same mispelling you used in post #12 due to your pedestrian copy, paste, and formatting skills. He doesn't mention polaritons either, which is what the paper is about.

[Kevmo]

Feel free to contact YE Kim and ask the same question, or even if he has been in contact with me. After all, that’s what I said that your physics boy should have done in the first place, but even you admit he prefers to tussle with pedestrians rather than other physicists. In the meantime, you’ve been proven to be completely wrong, moonboy.

[Moonman62]

Feel free to contact YE Kim and ask the same question, or even if he has been in contact with me.

My point is that he didn't pay much attention to detail. And if you had greater than pedestrian critical thinking skills you would have caught the error.

[Moonman62]

Yes, the formation of a BEC of deuterons (or other Bose nuclei) makes my theory more viable.

Polaritons are not deuterons, and they are not Bose nuclei. They are quasiparticles.

[Kevmo]

Take it up with him, mr. less-than-pedestrian