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Titles and Abstracts
Titles and Abstracts

... state as well as the measurement. In this talk, we describe this problem using the term of Fourier transform in group representation. As an example, we treat the case of SU(2) and Weyl-Heisenberg representation. Iman Marvian (Perimeter Institute for Theoretical Physics, Canada) Title: A generalizati ...
(Covariant) minimum length and cosmic expansion
(Covariant) minimum length and cosmic expansion

... – Preserve external symmetries and associated conservation laws – Avoid the phenomenon (see Jacobson) that the discrete creation of degrees of freedom due to cosmic expansion tends to be highly nonadiabatic, thus creating far more particles than consistent with observations. – Even only as a mathema ...
Effective action in quantum generalization of statistical
Effective action in quantum generalization of statistical

... We only remind that J was introduced there as a ratio between QO energy and its frequency. We are of opinion that this fact can serve as a good argument in support of our effective action definition . So, the concept of effective action is universal one. We emphasis it is not connected with any conc ...
if on the Internet, Press  on your browser to
if on the Internet, Press on your browser to

... Euclidean Quantum Gravity took a big technical leap during the 1980s and 1990s with the development of powerful computer simulations. These models represent curved spacetime geometries using tiny building blocks which, for convenience, are taken to be triangular. Triangle meshes can efficiently appr ...
AdS/CFT to hydrodynamics
AdS/CFT to hydrodynamics

... “For the viscosity…expansion was developed by Bogolyubov in 1946 and this remained the standard reference for many years. Evidently the many people who quoted Bogolyubov expansion had never looked in detail at more than the first two terms of this expansion. It was then one of the major surprises i ...
A DIRECT PROOF OF THE QUANTUM VERSION OF MONK`S
A DIRECT PROOF OF THE QUANTUM VERSION OF MONK`S

... degeneracy loci formulas on hyper-quot schemes. In the present paper we give a direct geometric proof of the quantum Monk’s formula which relies only on classical Schubert calculus and the definition of Gromov-Witten invariants. In particular, no compactifications of moduli spaces are required. Our ...
On a Quantum Version of Pieri`s Formula
On a Quantum Version of Pieri`s Formula

... using nontrivial algebro-geometric techniques. By contrast, our proof is combinatorial, and does not rely upon geometry at all—once (quantum) Monk’s formula is given. Our proof seems to be new even in the classical case. Key words and phrases. Flag manifold, Monk’s formula, Pieri’s formula, quantum ...
Quantum Field Theory II
Quantum Field Theory II

... this way we can determine the value of Y order by order in powers of g. Adjusting Y so that means that the sum of all connected diagrams with a single source is zero! In addition, the same infinite set of diagrams with source replaced by ANY subdiagram is zero as well. Rule: ignore any diagram that, ...
Evolving QCD - Department of Theoretical Physics
Evolving QCD - Department of Theoretical Physics

... solved in local potential approximation the vacuum evolution, the finite temperature evolution and finite baryon density evolution [10–12]. There are strong similarities between the vacuum evolution as a function of resolution scale and as a function of temperature. Both show the transition from par ...
The Excitement of Scattering Amplitudes
The Excitement of Scattering Amplitudes

... Goals: application to analysis of data from LHC, Fermilab. New physics insights? 3) Use new methods to explore perturbative quantum gravity. Goals: Point-particle quantum gravity perturbatively sensible? Gravity as (gauge theory)2 Relations to string theory? ...
Lactose Free, Direct Compression Formulation Used to Produce
Lactose Free, Direct Compression Formulation Used to Produce

... an allergic reaction. Many marketed loratadine products use lactose as the main filler ingredient. Lactose, one of the most commonly used fillers in solid dosage formulations, is well known for producing tablets with high mechanical strength. However, its usage has been eroded by some relatively rec ...
Untitled - School of Natural Sciences
Untitled - School of Natural Sciences

... quantum theories) is needed. In most situations, the contradictory requirements of quantum mechanics and general relativity are not a problem, because either the quantum effects or the gravitational effects are so small that they can be neglected or dealt with by approximations. When the curvature o ...
1. Gravitational Thermodynamics and the Cosmological Constant
1. Gravitational Thermodynamics and the Cosmological Constant

... gravitational variables x and the matter variables, say y , is determined by the Universal mass ( it is still consistent with the replacement we made earlier). The determination of Newton’s Gravitational “fundamental constant” by the universal distribution of matter and by  , is a full Mach-Berkele ...
Quantum Gravity: The View From Particle Physics
Quantum Gravity: The View From Particle Physics

... small distances. The generic occurrence of space-time singularities in GR is an unavoidable feature of the theory, indicating that classical concepts of space and time must be abandoned at distances of the order of the Planck scale. Likewise, there are indications of a breakdown of conventional QFT ...
Properties of higher-order Trotter formulas
Properties of higher-order Trotter formulas

... cannot be readily exploited in Monte Carlo simulations (as was our primary hope when starting this investigation) since a Euclidean version of the more rapidly converging discrete path integral does not exist. This restriction is a consequence of the fact that the negative coefficients of the higher ...
Quantum Black Holes
Quantum Black Holes

... •  One can however show a few features such a theory should have, most notably: there is a minimal length in nature (e.g. XC, M. Graesser and S. Hsu) which corresponds to the size of the quantum fluctuations of spacetime itself. ...
VALIDITY OF SEMICLASSICAL GRAVITY
VALIDITY OF SEMICLASSICAL GRAVITY

... necessary for trace-anomaly driven inflations (e.g., Starobinsky 1980) ...
PoS(QG-Ph)011
PoS(QG-Ph)011

... It is clear that current and future particle accelerators will not be reaching the Plank Energy regime anytime soon and thus Quantum Gravity could well be beyond our experimental reach. Recently, people have considered the possibility that Quantum Gravity effects may be detected through violations o ...
Solutions of the Equations of Motion in Classical and Quantum
Solutions of the Equations of Motion in Classical and Quantum

... This approach to the quantization stresses the role of the operator algebra at a fixed time and it is best suited for the formulation of the quantum theory in the Schrodinger picture. The Heisenberg picture is obtained usually from the Schrodinger picture by applying the time-dependent unitary autom ...
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...  On the level of theoretical models, there exists a connection between near-equilibrium regime of certain strongly coupled thermal field theories and fluctuations of black holes  This connection allows us to compute transport coefficients for these theories  At the moment, this method is the only ...
TALK - ECM-UB
TALK - ECM-UB

... Structure constants No quantum anomalies in commutator ...
Transport properties of strongly coupled gauge
Transport properties of strongly coupled gauge

...  On the level of theoretical models, there exists a connection between near-equilibrium regime of certain strongly coupled thermal field theories and fluctuations of black holes  This connection allows us to compute transport coefficients for these theories  At the moment, this method is the only ...
Introduction to Renormalization Group Alex Kovner Valparaiso, December 12-14, 2013
Introduction to Renormalization Group Alex Kovner Valparaiso, December 12-14, 2013

... For each propagator D(p) = p 2 −mi 2 +iǫ a line. For each vertex iλ a cross. In order λn draw all (topologically distinct) diagramms that can be constructed from n vertices connected by propagators with given number of external points. Energy-Momentum conservation in each vertex Integrate over all l ...
Scalars 2011
Scalars 2011

... Then came a new (Wilsonian) way of looking at quantum field theory Field Theory as effective long distance expansion Dimension less than 4: super renormalizable Fear & Loathing Dimension equal to 4: renormalizable Dimension greater than 4: non renormalizable To be expected ...
PASCOS - CERN Indico
PASCOS - CERN Indico

... Starting with a generic SFT one knows (Wess 1960) that the trace of the energy momentum obeys a local equation : where is local , the “virial current” . If the virial current is a gradient i.e. ...
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Asymptotic safety in quantum gravity

Asymptotic safety (sometimes also referred to as nonperturbative renormalizability) is a concept in quantum field theory which aims at finding a consistent and predictive quantum theory of the gravitational field. Its key ingredient is a nontrivial fixed point of the theory's renormalization group flow which controls the behavior of the coupling constants in the ultraviolet (UV) regime and renders physical quantities safe from divergences. Although originally proposed by Steven Weinberg to find a theory of quantum gravity, the idea of a nontrivial fixed point providing a possible UV completion can be applied also to other field theories, in particular to perturbatively nonrenormalizable ones. In this respect, it is similar to Quantum triviality.The essence of asymptotic safety is the observation that nontrivial renormalization group fixed points can be used to generalize the procedure of perturbative renormalization. In an asymptotically safe theory the couplings do not need to be small or tend to zero in the high energy limit but rather tend to finite values: they approach a nontrivial UV fixed point. The running of the coupling constants, i.e. their scale dependence described by the renormalization group (RG), is thus special in its UV limit in the sense that all their dimensionless combinations remain finite. This suffices to avoid unphysical divergences, e.g. in scattering amplitudes. The requirement of a UV fixed point restricts the form of the bare action and the values of the bare coupling constants, which become predictions of the asymptotic safety program rather than inputs.As for gravity, the standard procedure of perturbative renormalization fails since Newton's constant, the relevant expansion parameter, has negative mass dimension rendering general relativity perturbatively nonrenormalizable. This has driven the search for nonperturbative frameworks describing quantum gravity, including asymptotic safety which — in contrast to other approaches—is characterized by its use of quantum field theory methods, without depending on perturbative techniques, however. At the present time, there is accumulating evidence for a fixed point suitable for asymptotic safety, while a rigorous proof of its existence is still lacking.
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