Talk:Soliton

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Solitons in fiber optics[edit]

from the following it would be useful to know over what distance this was achieved, as otherwise its meaningless:

In 1998, Thierry Georges and his team at France Telecom R&D Center, combining optical solitons of different wavelengths (wavelength division multiplexing), demonstrated a data transmission of 1 terabit per second (1,000,000,000,000 units of information per second).

Matthew Rollings (talk) 08:48, 7 October 2008 (UTC)

How long solitons exist?[edit]

Could somebody tell what is maximal time of soliton's existence,especially magnetic or electromagnetic one? Also what is maximal energy that soliton could contain?


News This article has been mentioned by a media organisation:

Some suggestions[edit]

The inverse scattering transform technique is universally regarded as a landmark in the theory of partial differential equations and applied mathematics in general, so I think it amply deserves its own article, which this article should cite. The proposed article on inverse scattering should probably also mention applications to exact solutions of Einstein's field equations as well as to solving the Korteweg-de Vries equation and sine-Gordon equation.

I think this article should also mention the closely related concept of a completely integrable system, and the observation of Shiing-Shen Chern that these can be formulated in terms of appropriate flat (zero curvature) connections. ---CH

P.S. Hi, MarSch, I just noticed you seem to have a link to a web page owned by someone I know at the top of your user page! ---CH

Yeah, I came across it and I thought that was a good place to store it. I don't know that person though. --MarSch 14:56, 24 Jun 2005 (UTC)

Someone should should add some info about other areas that solitons show up, like plasmas.

Photos?[edit]

Anyone got a decent soliton photo? Perhaps a tidal bore that's transitioned or a canal example...? UmptanumRedux 23:29, 30 June 2006 (UTC)

I added a link to a great photo of a Soliton. --Nick 17:45, 6 July 2006 (UTC)

Relationship between a Standing Wave and a Soliton?[edit]

Could someone please add some text explaining the relationship between a Soliton and a Standing Wave? They seem to be intimately related. See how both are discussed in the article on Modelocking. For example, is it accurate to describe a Soliton as a "Travelling" Standing Wave? Or a Standing Wave as a Stationary Soliton? --Nick 17:44, 6 July 2006 (UTC)

As I see it, no. A soliton is self-reinforcing, whereas standing waves require constant energy input to maintain their form. (Late reply much?) - -NotHugo- - (talk) 09:53, 19 August 2008 (UTC)

Trek[edit]

In some Stare Trek TNG Episode, a soliton wave is used to propel a test ship, should that be put in?

No. -- Jitse Niesen (talk) 03:28, 18 May 2007 (UTC)

Topological defects vs. solitons[edit]

The article states that solitons belong to a class of phenomomena known as "topological defects". I'm not sure that this is true for all solitons. I think that there may be some solitons (such as the soliton solution to the nonlinear Schrodinger equation) that cannot be described as topological solitons - although I am not certain of this. Does anyone know if this is the case? 129.234.4.10 17:21, 14 September 2007 (UTC)

See Q-balls. There instead of a conserved topological charge, there is a different kind of charge Q (for instance, a Noether charge associated with U(1) symmetry) that prevents the disturbance from dissipating. Steve Avery (talk) 00:38, 14 January 2008 (UTC)

In relativistic field theories is often assumed (see e.g. T.D.Lee 1992) that all solitons belong to one of these groups: i) Topological solitons, where there exist a conserved charge of topological nature (due to the existence of non-trivial boundary conditions at spatial infinity) preventing the dissipation of the soliton ii) Non-topological solitons, where the conserved charge is not due to topological reasons but to other properties of the system, as an invariance of the lagrangian (e.g. Q-Balls with a U(1) symmetry), the existence of a singularity at the origin in the form of a Dirac-delta function allowing a charge-definition (as in the Born-Infeld theory) and other. In this sense the notion of topological defects is usually identified to that of topological solitons (although some authors find subtle differences between both concepts). Kaycopperfield (talk) 23:04, 15 February 2008 (UTC)

Metaphorical extension[edit]

Gowaty (1997: p.556) in discussing the soliton wave as a metaphor and property often found within nonlinear systems states:

The solitary wave, or soliton as it is now called, has since been discovered in a wide variety of nonlinear systems such as electrical circuits, nerve impulses, and the vibrations of atoms. It has even been suggested that elementary particles are not, in fact, the fundamental building blocks of matter but are the solitons of an underlying nonlinear quantum field (Peat, 1987; p.74). Solitons are depicted as vertical excitements of energies interrupting an arbitrary parallel physical plane or landscape...The relative intensities of the excitements determine the nature of the interruption (i.e., the more intense the excitement, the wider the gap and the longer the length of time for the soliton to hover before dissipation)...On the surface, the interruptions of the solitons upon the vista, whether an intellectual, a spiritual, or a philosophical landscape, provide gaps in the pattern and predictability of these geographies or ideologies. [1]

This quotation with citation was removed from this article by Xxanthippe on grounds of copyvio and relevance. There is no copyvio as it was a direct quotation that was cited and it is clearly relevant. It conveys how the meme has entered discourse other than Physics.
B9 hummingbird hovering (talkcontribs) 11:17, 29 April 2009 (UTC)

  1. ^ Gowaty, Patricia Adair (1997). Feminism and evolutionary biology: boundaries, intersections, and frontiers. Tenth Edition, illustrated. Springer. ISBN 0412073617. Source: [1] (accessed: Wednesday April 29, 2009), p.556
I reverted, this is completely irrelevant to solitons. I suggest creating Soliton (sociology) or something like that. I do have concerns of notability too, as this use of "soliton" is just a lame attempt to leach off some legitimacy off of physics... Headbomb {ταλκκοντριβς – WP Physics} 19:28, 29 April 2009 (UTC)
Integration not territoriality! Please enter into dialogue before removal of the relevant abovementioned citation.
B9 hummingbird hovering (talkcontribs) 07:29, 30 April 2009 (UTC)
Restoring it doesn't make it anymore relevant. This article is about solitons, aka a self-reinforcing waves. The metaphorical mumbo-jumbo of "ecofeminists" has no place here. Create Solition (sociology) (or similar) and place a For the concept of solitons in sociology, see Soliton (sociology) at the top of the page if you feel like it, but whatever Gowaty is talking about doesn't belong here.Headbomb {ταλκκοντριβς – WP Physics} 07:44, 30 April 2009 (UTC)
Ecofeminism is not Sociology. By "whatever Gowaty is talking about" conveys that you don't understand the paragraph, so how can you make a sound determination whether or not it is relevant? Gowaty is a standard university text that is now in its 10th Edition, it is not to be so easily dismissed.
B9 hummingbird hovering (talkcontribs) 10:56, 30 April 2009 (UTC)
First I'm not saying Ecofeminism is sociology, I'm giving an example of a possible name for the article. If it's soliton (psychology), then place it there. If it's soliton (pirates & ninja), then place it there. I don't care where it ends up, as long as its not on the physics page. Also, I'm saying "whatever Gowaty is talking about" because from reading what he wrote, he's doing what every scientists hates about humanities, he's begging us to bring Newton's Flaming Laser Sword down on him. It's a textbook case of physics envy. See the Sokal affair while you're at it. Headbomb {ταλκκοντριβς – WP Physics} 11:15, 30 April 2009 (UTC)
Yahoo's GeoCities ceased to exist several years ago, rendering the link "Newton's Flaming Laser Sword" bad. 66.81.212.65 (talk) 06:12, 10 March 2014 (UTC) Twitter.Com/CalRobert (Robert Maas)

The article clearly starts with "In mathematics and physics, a soliton is ...", so this material is off-topic. I do not care where it goes, but it does not belong in this exact sciences article. -- Crowsnest (talk) 11:51, 30 April 2009 (UTC)
You can put it somewhere else, if you think it is notable, and use one of the Template:Otheruses variants on top of this page, as already suggested by Headbomb. -- Crowsnest (talk) 11:58, 30 April 2009 (UTC)

If u "mathematics and physics" editors are going to be territorial of ur patch then at minimum improve the quality of ur field. The lack of citations in this article and other science articles is marked.
Svaha
B9 hummingbird hovering (talkcontribs) 11:55, 17 May 2009 (UTC)
See WP:WIP.Headbomb {ταλκκοντριβς – WP Physics} 00:46, 18 May 2009 (UTC)

More suggestions - weak paragraph[edit]

This paragraph does not well-serve Wikipedia's function of teaching.

The above impressive experiments have not translated to actual commercial soliton system deployments however, in either terrestrial or submarine systems, chiefly due to the Gordon-Haus (GH) jitter. The Gordon-Haus jitter is jitter in what? Phase? Name a parameter, give a link The GH jitter requires sophisticated, expensive compensatory solutions that ultimately makes DWDM soliton transmission in the field unattractive, compared to the conventional non-return-to-zero/return-to-zero paradigm. Say: compared to conventional long-haul methods. Period. It is nice that you know modulation and coding techniques, nice you may follow their evolution in the years ahead, but how we do data-layer modulation is not the first thing to bring up in an exposition of PHY layer propagation issues. Further, the likely future adoption of the more spectrally efficient phase-shift-keyed/QAM formats makes soliton transmission even less viable, due to the Gordon-Mollenauer effect. Consequently, the long-haul fiberoptic transmission soliton has remained a laboratory curiosity It would be helpful to say what the Gordon-Mollenauer effect is and to provide a reference, or simply remove it. A broader conclusion would be more correct and more helpful: Improvements in both the transport and amplification of light pulses and in the encoding of the information carried by them have blocked solitons from commercial acceptance.

We are here to help others. You can do this better than I can, so just do it. Thanks. Jerry-va (talk) 21:16, 26 October 2010 (UTC)

New form of oscillator[edit]

Research published in the August 30 2010 of Physical Review theorizes a new form of oscillator using solitons. "You might use this effect to create an oscillator the uses much less energy than those in use today. And the military could use them in secure communications as well. In theory you could change the frequency of these devices quite rapidly, making the signals very hard for enemies to intercept or jam" This has great potential implications on existing RF communications. The predicted oscillator would be much more stable than traditional oscillators along with wide variations in current applied to the oscillator which would greatly reduce unwanted noise in the system . for stable

jeepmon@hotmail.com  — Preceding unsigned comment added by JEEPMON (talkcontribs) 10:24, 18 January 2011 (UTC) 

Do solitons preserve their energy?[edit]

Do solitons preserve their energy as well as shape? —Preceding unsigned comment added by 74.58.84.243 (talk) 03:16, 15 February 2011 (UTC)

dark soliton[edit]

In the table of discoveries by year, 1987 has a link to a WikiPedia page titled "dark soliton", which is listed as having been deleted. Some WikiPedia expert needs to somehow fix this broken link. 66.81.212.65 (talk) 05:58, 10 March 2014 (UTC) Twitter.Com/CalRobert (Robert Maas)