Results 11 to 20 of about 8,211 (262)
SciPost Physics, 2023 We present a quantitative and fully non-perturbative description of the ergodic phase of quantum chaos in the setting of two-dimensional gravity. To this end we describe the doubly non-perturbative completion of semiclassical 2D gravity in terms of its ...
Alexander Altland, Boris Post, Julian Sonner, Jeremy van der Heijden, Erik Verlinde
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Selection rules for breaking selection rules
New Journal of Physics, 2021 Floquet systems often exhibit dynamical symmetries (DS) that govern the time-dependent dynamics and result in selection rules. When a DS is broken, selection rule deviations are expected.
Matan Even Tzur +3 more
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The Journal of Physical Chemistry Letters, 2023 The phenomena of propensity and inverse propensity are explored using time-dependent mixed quantum classical theory, MQCT, in which the rotational motion of the molecule is treated quantum mechanically, whereas the scattering process is described classically. Good agreement with the results of accurate full-quantum calculations is reported for a closed
Imanzi, K +5 more
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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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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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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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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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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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