Filters








381,780 Hits in 2.3 sec

Conditional Symmetry Breaking [chapter]

Ian P. Gent, Tom Kelsey, Steve A. Linton, Iain McDonald, Ian Miguel, Barbara M. Smith
2005 Lecture Notes in Computer Science  
We introduce the study of Conditional symmetry breaking in constraint programming.  ...  These are: adding conditional symmetry-breaking constraints, reformulating the problem to remove the symmetry, and augmenting the search process to break the conditional symmetry dynamically through the  ...  Conditional Symmetry-breaking Constraints A straightforward method of breaking conditional symmetries is to add constraints to the model of the form: conditionsymmetry-breaking constraint where condition  ... 
doi:10.1007/11564751_21 fatcat:lvxwh2aaqfgkjdfwr3cicdgjp4

Forced symmetry-breaking via boundary conditions [article]

Zhen Mei, Chih-Wen Shih (National Chiao-Tung University)
1998 arXiv   pre-print
We study impact of a forced symmetry-breaking in boundary conditions on the bifurcation scenario of a semilinear elliptic partial differential equation.  ...  symmetries than the imposed boundary conditions.  ...  The boundary conditions (3) break the D 4 -symmetry into D 2 -symmetry.  ... 
arXiv:math/9804160v1 fatcat:urdkibvaafgudmdpxybl4pjqq4

Forced symmetry-breaking via boundary conditions

Zhen Mei, Chih-Wen Shih
2001 Nonlinear Analysis  
Acknowledgements The authors would like to thank Song-Sun Lin for his suggestion on the studies of symmetry breaking in boundary condition.  ...  We are interested in impact of symmetry-breaking in boundary conditions on the bifurcation scenarios.  ...  To this end we consider a square domain and impose the following conditions along its four sides Boundary conditions (3) break the D 4 -symmetry into D 2 -symmetry as varies.  ... 
doi:10.1016/s0362-546x(99)00279-5 fatcat:zu6vfmkhibazrm6xnnwxsymkcm

't Hooft anomaly matching condition and chiral symmetry breaking without bilinear condensate [article]

Satoshi Yamaguchi
2018 arXiv   pre-print
We use 't Hooft anomaly matching condition of the center symmetry and the chiral symmetry, and find constraints on the spontaneous chiral symmetry breaking in the confining phase.  ...  This theory, in general, has a discrete chiral symmetry.  ...  breaking of the center symmetry.  ... 
arXiv:1811.09390v3 fatcat:e2a3ugbstnej3f6gyobus2yy34

Comments on the symmetry breaking condition in MacDowell-Mansouri action [article]

I. Díaz-Saldaña, M. Sabido, J. C. López-Domínguez, J. E. Rosales-Quintero
2021 arXiv   pre-print
We obtain the equations of motion of this action, and analyze the symmetry breaking conditions.  ...  In this work we study the symmetry breaking conditions, given by a (anti)de Sitter-valued vector field, of a full (anti)de Sitter-invariant MacDowell-Mansouri inspired action.  ...  asking for a subgroup of SO(4, 1) which leaves v fixed, we will refer at these two conditions as the symmetry breaking conditions (SBC).  ... 
arXiv:2010.12515v3 fatcat:e3zhuc6pb5hvtfrajfa37an75m

Symmetry breaking boundary conditions and WZW orbifolds [article]

L. Birke, J. Fuchs, C. Schweigert
1999 arXiv   pre-print
Symmetry breaking boundary conditions for WZW theories are discussed.  ...  We derive explicit formulae for the reflection coefficients in the presence of boundary conditions that preserve only an orbifold subalgebra with respect to an involutive automorphism of the chiral algebra  ...  They do not preserve the full bulk symmetry, but only A ω . We get as many symmetry breaking boundary conditions as there are symmetric primary fields in the original theory.  ... 
arXiv:hep-th/9905038v1 fatcat:34fnhkjvbbexjofajk4cx5bs34

Symmetry breaking boundary conditions and WZW orbifolds

Lothar Birke, Jürgen Fuchs, Christoph Schweigert
1999 Advances in Theoretical and Mathematical Physics  
Symmetry breaking boundary conditions for WZW theories are discussed.  ...  We derive explicit formulae for the reflection coefficients in the presence of boundary conditions that preserve only an orbifold subalgebra with respect to an involutive automorphism of the chiral algebra  ...  They do not preserve the full bulk symmetry, but only A ω . We get as many symmetry breaking boundary conditions as there are symmetric primary fields in the original theory.  ... 
doi:10.4310/atmp.1999.v3.n3.a8 fatcat:4y6tph7tn5e2hh6rx7dbpu2s3e

Condition on the symmetry-breaking solution of the Schwinger–Dyson equation

G. Cheng, T. K. Kuo
1997 Journal of Mathematical Physics  
It implies that, for quenched planar QED, although chiral symmetry breaking occurs when there is a cutoff, the continuum limit fails to exist.  ...  We derive a condition for a nontrivial solution of the Schwinger-Dyson equation to be accompanied by a Goldstone bound state.  ...  Condition for a symmetry-breaking solution of the SD equation For any physical bound state, the wave function must satisfy a normalization condition.  ... 
doi:10.1063/1.532205 fatcat:pb5nc3hbzjemznvdfznrtunuye

Conditions for the emergence of gauge bosons from spontaneous Lorentz symmetry breaking [article]

C. A. Escobar, L. F. Urrutia
2015 arXiv   pre-print
., photons and gravitons) as Goldstone bosons arising from spontaneous symmetry breaking is an interesting hypothesis which would provide a dynamical setting for the gauge principle.  ...  We investigate this proposal in the framework of a general (NANM), effectively providing spontaneous Lorentz symmetry breaking in terms of the corresponding Goldstone bosons.  ...  after the spontaneous Lorentz symmetry breaking.  ... 
arXiv:1506.06171v2 fatcat:yw7gbvt4vfedrevnun4c2fzu4m

Replica Symmetry Breaking Condition Exposed by Random Matrix Calculation of Landscape Complexity [article]

Yan V Fyodorov, Ian Williams
2007 arXiv   pre-print
This is used to show that for a generic smooth, concave confining potentials the condition of the zero-temperature replica symmetry breaking coincides with one signalling that both mean total number of  ...  This is equivalent to µ(R 2 cr ) < µ cr which is precisely the replica symmetry breaking condition Eq.(60).  ...  The free energy is then given by with the equality µ 2 d = f ′′ T µ d providing the condition of the replica symmetry breaking transition.  ... 
arXiv:cond-mat/0702601v2 fatcat:yddpvgzvfbcz7crol6vczec27m

Holon Pair Bose Condensation in High T_c Cuprates; Symmetry Breaking and Supersymmetry Conditions [article]

Sung-Sik Lee, Sung-Ho Suck Salk
2000 arXiv   pre-print
Using the t-J Hamiltonian of U(1) slave-boson symmetry, bose condensation is discussed by showing the occurrence of symmetry breaking in the hole doped high T_c cuprates.  ...  The symmetry breaking is shown to take place with the d-wave hole pairing, but not with the s-wave hole pairing.  ...  In short, spontaneous symmetry breaking arises as a result of the hole-pairing of the d-wave symmetry, but not the s-wave symmetry at a critical temperature.  ... 
arXiv:cond-mat/9905268v2 fatcat:l3htjxkdnrbefgrjqtwcb2ayw4

Symmetry breaking from continous and discrete Scherk-Schwarz periodicity conditions

M. Salvatori
2007 AIP Conference Proceedings  
We describe the residual symmetries of each vacua and the 4-dimensional effective spectrum in terms of continous and discrete parameters, respectively.  ...  The consistency conditions, indeed, forbid to have trivial transition functions and then the symmetry breaking can not be related only to the VEV of A a .  ...  In the case m = 0, we cannot interpret the symmetry breaking mechanism as a spontaneous symmetry breaking mechanism.  ... 
doi:10.1063/1.2735209 fatcat:i3qct757prdbxeshcvjxthormm

The critical Casimir effect in films for generic non-symmetry-breaking boundary conditions

H W Diehl, Felix M Schmidt
2011 New Journal of Physics  
This translates into mesoscopic boundary conditions of the generic symmetry-preserving Robin type ∂_nϕ=c_jϕ.  ...  A detailed renormalization-group (RG) study of the critical Casimir forces induced between the film's boundary planes by thermal fluctuations is presented for the case where the O(n) symmetry remains unbroken  ...  We restricted out attention to the case of generic non-symmetry-breaking boundary conditions.  ... 
doi:10.1088/1367-2630/13/12/123025 fatcat:fm7iwerphvhdbavvsysbixm3ym

Novel electroweak symmetry breaking conditions from quantum effects in the MSSM

Christophe Le Mouël, Gilbert Moultaka
1998 Nuclear Physics B  
Special emphasis is put on the role played by Str M^4 in the determination of the electroweak symmetry breaking conditions, where first and second order derivatives of the effective potential are systematically  ...  We present, in the context of the Minimal Supersymmetric Standard Model, a detailed one-loop analytic study of the minimization conditions of the effective potential in the Higgs sector.  ...  The first of these inequalities is a sufficient but not necessary condition for electroweak symmetry breaking to take place, so that one also needs to consider the condition m 2 1 > m 2 2 in order to exclude  ... 
doi:10.1016/s0550-3213(98)00030-3 fatcat:m3dahra5szcvhnzvgdi3mtzkda

Topological conditions for discrete symmetry breaking and phase transitions

Fabrizio Baroni, Lapo Casetti
2005 Journal of Physics A: Mathematical and General  
In the framework of a recently proposed topological approach to phase transitions, some sufficient conditions ensuring the presence of the spontaneous breaking of a Z_2 symmetry and of a symmetry-breaking  ...  Then some mean-field models already known in the literature are discussed in the light of the sufficient conditions introduced here.  ...  Phase transitions with Z2 symmetry breaking At a qualitative level, the physical mechanism underlying the spontaneous breaking of a Z 2 symmetry is quite well understood [22] .  ... 
doi:10.1088/0305-4470/39/3/006 fatcat:rmrqaoxphvacpkyx5xcajpfply
« Previous Showing results 1 — 15 out of 381,780 results