scholarly journals Phase diagrams of SO( N ) Majorana-Hubbard models: Dimerization, internal symmetry breaking, and fluctuation-induced first-order transitions

2022 ◽  
Vol 105 (4) ◽  
Author(s):  
Lukas Janssen ◽  
Urban F. P. Seifert
Keyword(s):  
Symmetry Breaking ◽  
Phase Diagrams ◽  
Internal Symmetry ◽  
Hubbard Models ◽  
First Order

ZNandN-state Potts lattice gauge theories: Phase diagrams, first-order transitions,βfunctions, and1Nexpansions

1980 ◽  
Vol 22 (10) ◽  
pp. 2447-2464 ◽  
Author(s):  
J. B. Kogut ◽  
R. B. Pearson ◽  
J. Shigemitsu ◽  
D. K. Sinclair
Keyword(s):  
Phase Diagrams ◽  
Gauge Theories ◽  
First Order ◽  
Lattice Gauge ◽  
Lattice Gauge Theories

scholarly journals SUM RULES FOR TETRAQUARK DECAY COUPLING CONSTANTS WITH BROKEN SU(3) SYMMETRY

2012 ◽  
Vol 27 (29) ◽  
pp. 1250165 ◽  
Author(s):  
V. GUPTA ◽  
G. SÁNCHEZ-COLÓN ◽  
S. RAJPOOT
Keyword(s):  
Symmetry Breaking ◽  
Sum Rules ◽  
Coupling Constants ◽  
First Order

We give sum rules for tetraquark decay coupling constants, taking into account the SU(3) symmetry breaking interactions to first order.

Stabilization of a CSTR in an Oscillatory State by Varying the Thermal Characteristics of the Reactor Vessel

2006 ◽  
Vol 4 (1) ◽  
Author(s):  
Luis F Razon
Keyword(s):  
Phase Diagrams ◽  
Limit Cycle ◽  
Bifurcation Analysis ◽  
Chemical Engineering ◽  
Exothermic Reaction ◽  
Thermal Characteristics ◽  
Reactor Vessel ◽  
First Order ◽  
Classic Problem ◽  
Oscillatory State

One of the most thoroughly studied systems in chemical engineering is the classic problem of a first-order exothermic reaction in a diabatic CSTR. In this paper, an extension of the classic problem, in which the reactor vessel temperature varies independently of its contents, is considered. A bifurcation analysis showed that a CSTR in an oscillatory state may be stabilized by the use of a reactor with the appropriate combination of thermal characteristics. Stabilization of an oscillatory state was demonstrated for a variety of scenarios that had been previously shown by Uppal, Ray and Poore to be representative cases of phase diagrams that exhibit limit-cycle behavior.

T-O, OII-OIII and OIII-OI Phase Boundary in Oxygen-Chain-Equalised and Order-Stabilised Polycrystalline Pair Samples of YBa2Cu3O6+x

1999 ◽  
Vol 13 (09n10) ◽  
pp. 1073-1078 ◽  
Author(s):  
G. Calestani ◽  
P. Manca ◽  
S. Sanna ◽  
A. Migliori
Keyword(s):  
Electron Diffraction ◽  
Symmetry Breaking ◽  
Phase Diagrams ◽  
Structural Phase ◽  
Comparative Investigation ◽  
Oxygen Stoichiometry ◽  
Antiferromagnetic Ordering ◽  
Critical Oxygen ◽  
Oxygen Chain ◽  
First Time

A comparative investigation, performed on Oxygen-Chain-equalised(k) Deintercalated [ OCD ] k and Intercalated [ OCD ] k pair-samples ( k -pairs) of YBa 2 Cu 3 O 6+x by resistive T c and electron diffraction (ED) at steps Δk=0.02-0.03, revealed that equivalent or non-equivalent microscopic oxygen-chain arrangements are produced, at the same oxygen content k, by intercalation and deintercalation of oxygen in the Cu(1)Ox chains. These arrangements manifest in Tc -singularities or Tc -splittings of the k -pairs, whose occurrence can be straightforwardly explained by taking into account the non equivalence of the structural phase diagrams of YBCO, pointed out by electron diffraction, when produced by intercalation of oxygen in the tetragonal T structure or by deintercalation from the orthorhombic OI structure. Tc -singularities are produced in the k ranges for which a superimposition of the phase diagrams occurs, whereas Tc -splitting are pointed out in correspondence of splitted structural regions. The maximum Tc -splitting is observed in proximity of the semiconductor-metal transition with the appearing of superconductivity related to an anti-OIII (OIII*) superstructure in intercalated samples at k =0.30, where the corresponding deintercalated samples are tetragonal and semiconductor. This result confirms that the vanishing of the antiferromagnetic ordering, the emergence of hole doped superconductivity and the symmetry breaking at the T-O transition are nearly coincident phenomena in YBCO. However the related critical oxygen stoichiometry is strictly dependent on the ordering parameter in the Cu(1) plane, i.e. on the formation of extended chains. The OIII* structure, for the first time observed in a systematic way at the T-O transition in intercalated samples, seems to exhibit in analogy with OII and OIII a characteristic Tc .

scholarly journals DECAY COUPLING CONSTANT SUM RULES FOR TETRAQUARKS $T[(\bar{Q}q)(Q\bar{q})]$ WITH BROKEN SU(3) SYMMETRY

2013 ◽  
Vol 28 (06) ◽  
pp. 1350015
Author(s):  
V. GUPTA ◽  
G. SÁNCHEZ-COLÓN ◽  
S. RAJPOOT
Keyword(s):  
Symmetry Breaking ◽  
Sum Rules ◽  
Coupling Constants ◽  
Coupling Constant ◽  
First Order

For tetraquarks of the form [Formula: see text] we give sum rules for their decay coupling constants, taking into account the SU(3) symmetry breaking interactions to first-order.

Dibaryon octet strong decay coupling constants sum rules with first-order SU(3) symmetry breaking

2017 ◽  
Vol 32 (07) ◽  
pp. 1750041 ◽  
Author(s):  
E. N. Polanco-Euán ◽  
G. Sánchez-Colón ◽  
V. Gupta
Keyword(s):  
Symmetry Breaking ◽  
Experimental Observation ◽  
Sum Rules ◽  
Baryon Number ◽  
Coupling Constants ◽  
Baryon Octet ◽  
Strong Decay ◽  
First Order

The SU(3) octet states with baryon number B = 2, hexaquark dibaryons, are considered. We extend previous work and determine strong decay coupling constants sum rules with first-order SU(3) symmetry breaking for dibaryon octet into two ordinary baryon octets and into a baryon octet plus a baryon decuplet. Possibilities for the experimental observation of multibaryon and anti-multibaryon states are pointed out.

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