The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Hiroshi Suzuki - One of the best experts on this subject based on the ideXlab platform.
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erratum Energy momentum tensor from the yang mills gradient flow progress of theoretical and experimental physics 2013 2013 083b03
Progress of Theoretical and Experimental Physics, 2015Co-Authors: Hiroshi SuzukiAbstract:The product of gauge fields generated by the Yang-Mills gradient flow for positive flow times does not exhibit the coincidence-point singularity and a local product is thus independent of the regularization. Such a local product can furthermore be expanded by renormalized local operators at zero flow time with finite coefficients that are governed by renormalization group equations. Using these facts, we derive a formula that relates the small flow-time behavior of certain gauge-invariant local products and the correctly-normalized Conserved Energy-momentum tensor in the Yang-Mills theory. Our formula provides a possible method to compute the correlation functions of a well-defined Energy-momentum tensor by using lattice regularization and Monte Carlo simulation.
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lattice Energy momentum tensor from the yang mills gradient flow inclusion of fermion fields
arXiv: High Energy Physics - Lattice, 2014Co-Authors: Hiroki Makino, Hiroshi SuzukiAbstract:Local products of fields deformed by the so-called Yang--Mills gradient flow become renormalized composite operators. This fact has been utilized to construct a correctly normalized Conserved Energy--momentum tensor in the lattice formulation of the pure Yang--Mills theory. In the present paper, this construction is further generalized for vector-like gauge theories containing fermions.
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Energy momentum tensor from the yang mills gradient flow
arXiv: High Energy Physics - Lattice, 2013Co-Authors: Hiroshi SuzukiAbstract:The product of gauge fields generated by the Yang-Mills gradient flow for positive flow times does not exhibit the coincidence-point singularity and a local product is thus independent of the regularization. Such a local product can furthermore be expanded by renormalized local operators at zero flow time with finite coefficients that are governed by renormalization group equations. Using these facts, we derive a formula that relates the small flow-time behavior of certain gauge-invariant local products and the correctly-normalized Conserved Energy-momentum tensor in the Yang-Mills theory. Our formula provides a possible method to compute the correlation functions of a well-defined Energy-momentum tensor by using lattice regularization and Monte Carlo simulation.
Michel Droz - One of the best experts on this subject based on the ideXlab platform.
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nonequilibrium temperatures in steady state systems with Conserved Energy
Physical Review E, 2005Co-Authors: Eric Bertin, Olivier Dauchot, Michel DrozAbstract:We study a class of nonequilibrium lattice models describing local redistributions of a globally Conserved quantity, which is interpreted as an Energy. A particular subclass can be solved exactly, allowing us to define a statistical temperature T(th) along the same lines as in the equilibrium micro-canonical ensemble. We compute the response function and find that when the fluctuation-dissipation relation is linear, the slope T(FD)(-1) of this relation differs from the inverse temperature T(th)(-1). We argue that T(th) is physically more relevant than T(FD), since in the steady-state regime, it takes equal values in two subsystems of a large isolated system. Finally, a numerical renormalization group procedure suggests that all models within the class behave similarly at a coarse-grained level, leading to a parameter that describes the deviation from equilibrium. Quantitative predictions concerning this parameter are obtained within a mean-field framework.
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temperature in nonequilibrium systems with Conserved Energy
Physical Review Letters, 2004Co-Authors: Eric Bertin, Olivier Dauchot, Michel DrozAbstract:We study a class of nonequilibrium lattice models which describe local redistributions of a globally Conserved Energy. A particular subclass can be solved analytically, allowing us to define a temperature T(th) along the same lines as in the equilibrium microcanonical ensemble. The fluctuation-dissipation relation is explicitly found to be linear, but its slope differs from the inverse temperature T(-1)(th). A numerical renormalization group procedure suggests that, at a coarse-grained level, all models behave similarly, leading to a two-parameter description of their macroscopic properties.
Nishanth Gudapati - One of the best experts on this subject based on the ideXlab platform.
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a Conserved Energy for axially symmetric newman penrose maxwell scalars on kerr black holes
Proceedings of The Royal Society A: Mathematical Physical and Engineering Sciences, 2019Co-Authors: Nishanth GudapatiAbstract:We show that there exists a 1-parameter family of positive-definite and Conserved Energy functionals for axially symmetric NewmanPenroseMaxwell scalars on the maximal space-like hypersurfaces in th...
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a Conserved Energy for axially symmetric newman penrose maxwell scalars on kerr black holes
arXiv: General Relativity and Quantum Cosmology, 2018Co-Authors: Nishanth GudapatiAbstract:We show that there exists a 1-parameter family of positive-definite and Conserved Energy functionals for axially symmetric Newman-Penrose-Maxwell scalars on the maximal spacelike hypersurfaces in the exterior of Kerr black holes. It is also shown that the Poisson bracket within this 1-parameter family of energies vanishes on the maximal hypersurfaces.
Liudmila V Joukovskaya - One of the best experts on this subject based on the ideXlab platform.
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time evolution in superstring field theory on non bps brane 1 rolling tachyon and Energy momentum conservation
Journal of High Energy Physics, 2003Co-Authors: Irina Ya Arefeva, Alexey S Koshelev, Liudmila V JoukovskayaAbstract:We derive equations of motion for the tachyon field living on an unstable non-BPS D-brane in the level truncated open cubic superstring field theory in the first non-trivial approximation. We construct a special time dependent solution to this equation which describes a rolling tachyon. It starts from the perturbative vacuum and approaches one of stable vacua in infinite time. We investigate Conserved Energy functional and show that its different parts dominate in different stages of the evolution. We show that the pressure for this solution has its minimum at zero time and goes to minus Energy at infinite time.
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time evolution in superstring field theory on non bps brane i rolling tachyon and Energy momentum conservation
arXiv: High Energy Physics - Theory, 2003Co-Authors: Ya I Arefeva, Liudmila V Joukovskaya, Alexey S KoshelevAbstract:We derive equations of motion for the tachyon field living on an unstable non-BPS D-brane in the level truncated open cubic superstring field theory in the first non-trivial approximation. We construct a special time dependent solution to this equation which describes the rolling tachyon. It starts from the perturbative vacuum and approaches one of stable vacua in infinite time. We investigate Conserved Energy functional and show that its different parts dominate in different stages of the evolution. We show that the pressure for this solution has its minimum at zero time and goes to minus Energy at infinite time.
Eric Bertin - One of the best experts on this subject based on the ideXlab platform.
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nonequilibrium temperatures in steady state systems with Conserved Energy
Physical Review E, 2005Co-Authors: Eric Bertin, Olivier Dauchot, Michel DrozAbstract:We study a class of nonequilibrium lattice models describing local redistributions of a globally Conserved quantity, which is interpreted as an Energy. A particular subclass can be solved exactly, allowing us to define a statistical temperature T(th) along the same lines as in the equilibrium micro-canonical ensemble. We compute the response function and find that when the fluctuation-dissipation relation is linear, the slope T(FD)(-1) of this relation differs from the inverse temperature T(th)(-1). We argue that T(th) is physically more relevant than T(FD), since in the steady-state regime, it takes equal values in two subsystems of a large isolated system. Finally, a numerical renormalization group procedure suggests that all models within the class behave similarly at a coarse-grained level, leading to a parameter that describes the deviation from equilibrium. Quantitative predictions concerning this parameter are obtained within a mean-field framework.
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temperature in nonequilibrium systems with Conserved Energy
Physical Review Letters, 2004Co-Authors: Eric Bertin, Olivier Dauchot, Michel DrozAbstract:We study a class of nonequilibrium lattice models which describe local redistributions of a globally Conserved Energy. A particular subclass can be solved analytically, allowing us to define a temperature T(th) along the same lines as in the equilibrium microcanonical ensemble. The fluctuation-dissipation relation is explicitly found to be linear, but its slope differs from the inverse temperature T(-1)(th). A numerical renormalization group procedure suggests that, at a coarse-grained level, all models behave similarly, leading to a two-parameter description of their macroscopic properties.