Results 21 to 30 of about 174,677 (231)
Theory of Dynamical Phase Transitions in Quantum Systems with Symmetry-Breaking Eigenstates
Physical Review Letters, 2023 4+ pages, 4 figures.
Ángel L. Corps, Armando Relaño
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Anomaly-free scale symmetry and gravity
Physics Letters B, 2023 In this Letter, we address the question of whether the conformal invariance can be considered as a global symmetry of a theory of fundamental interactions.
Mikhail Shaposhnikov, Anna Tokareva
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Nonperturbative calculation of symmetry breaking in quantum field theory [PDF]
Physical Review D, 1997 A new version of the delta expansion is presented, which, unlike the conventional delta expansion, can be used to do nonperturbative calculations in a self-interacting scalar quantum field theory having broken symmetry. We calculate the expectation value of the scalar field to first order in delta, where delta is a measure of the degree of nonlinearity
Bender, Carl M., Milton, Kimball A.
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T and C Symmetry Breaking in Algebraic Quantum Field Theory [PDF]
The 1st Electronic Conference on Universe, 2021 We have developed a quantum field theory of spinors based on the algebra of canonical anticommutation relations (CAR algebra). The proposed approach is based on the use of Grassmann densities in the momentum space and their derivatives with respect to the construction from these densities of both basis Clifford vectors of spacetime and the spinor ...
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Vacuum Radiation and Symmetry Breaking in Conformally Invariant Quantum Field Theory [PDF]
Communications in Mathematical Physics, 1999 The underlying reasons for the difficulty of unitarily implementing the whole conformal group $SO(4,2)$ in a massless Quantum Field Theory (QFT) are investigated in this paper. Firstly, we demonstrate that the singular action of the subgroup of special conformal transformations (SCT), on the standard Minkowski space $M$, cannot be primarily associated ...
Aldaya Valverde, Víctor +2 more
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The classical limit and spontaneous symmetry breaking in algebraic quantum theory [PDF]
Expositiones Mathematicae, 2022 In this paper an overview of some recent developments on the classical limit and spontaneous symmetry breaking (SSB) in algebraic quantum theory is given. In such works, based on the theory of $C^*$-algebras, the concept of the classical limit has been formalized in a complete algebraic manner. Additionally, since this setting allows for commutative as
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Emergent symmetries and coexisting orders in Dirac fermion systems
Physical Review Research, 2020 We consider interacting (2+1)-dimensional Dirac fermions with competing symmetry-breaking electronic instabilities, as described by relativistic quantum field theories of the Gross-Neveu-Yukawa flavor with anticommuting mass terms.
Emilio Torres +4 more
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Higher-form symmetry breaking at Ising transitions
Physical Review Research, 2021 In recent years, new phases of matter that are beyond the Landau paradigm of symmetry breaking have been accumulating, and to catch up with this fast development, new notions of global symmetry are introduced.
Jiarui Zhao +3 more
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Gauge symmetry breaking in gauge theories---In search of clarification [PDF]
, 2011 The paper investigates the spontaneous breaking of gauge symmetries in gauge theories from a philosophical angle, taking into account the fact that the notion of a spontaneously broken local gauge symmetry, though widely employed in textbook expositions ...
Friederich, Simon
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Resonances and PT symmetry in quantum curves
Journal of High Energy Physics, 2020 In the correspondence between spectral problems and topological strings, it is natural to consider complex values for the string theory moduli. In the spectral theory side, this corresponds to non-Hermitian quantum curves with complex spectra and ...
Yoan Emery +2 more
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