Is anyone familiar with this or heard of this concept before?(adsbygoogle = window.adsbygoogle || []).push({});

It started in 1953 by a paper by Dicke published in peer reviewed Physical Review Journal called "Coherence in Spontaneous Radiation Processes" http://prola.aps.org/abstract/PR/v93/i1/p99_1

Then in 1973 Hepp and Lieb published in peer reviewed papers "K. Hepp, E.H. Lieb, Phys. Rev. A 8 (1973) 2517. and K. Hepp, E.H. Lieb, Ann. Phys. 76 (1973)" concerning these Super-Radiant Phase Transition in condensed matter.

Or by way of summary:

"Dicke formulated a model which was later shown to exhibit a super-radiant phase

transition (by Hepp and Lieb). The notion that such phase transitions should exist in condensed matter systems has been investigated in a series of papers by Preparata and coworkers [4–6] and others [7–9]. Different workers have come to somewhat different conclusions concerning super-radiant phase transitions [10–19]. Some doubt has been expressed [20–24] concerning the physical laboratory reality of super-radiant phase transition.

The mathematical issues are as follows: (i) It appears, at first glance, that quadratic

terms (in photon creation and annihilation operators) enter into the model via quadratic

terms inthe vector potential A. (ii) The quadratic terms in the “corrected Dicke model”

appear to destroy the super-radiant phase transition.

Then many works show that if the dipole–field interactionis treated in a gauge invariant manner [25–27] then the interaction is strictly linear in the electric field E. Thus, quadratic terms are absent for purely electric dipole–photon interactions [28]. These considerations render likely the physical reality of condensed matter super-radiant phase transitions."

(from http://arxiv.org/abs/cond-mat/0007374)

What do you make of this? Preparata and others have shown many experimental results.

http://arxiv.org/abs/cond-mat/9801248

http://arxiv.org/abs/quant-ph/9804006

Has anyone encountered the concepts mentioned in this message before? Can you please comment especially experts in Condensed Matter (and even the not so experts). If confirmed. The implications would be significant. Latest paper concerning the original peer reviewed concept or ideas was just last January 31, 2012 for example in http://arxiv.org/pdf/1108.2987.pdf

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# Condensed Matter Super-Radiant Phase Transition

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