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217
Lectures on curved betagamma systems, pure spinors, and anomalies
"... The curved betagamma system is the chiral sector of a certain infinite radius limit of the nonlinear sigma model with complex target space. Naively it only depends on the complex structures on the worldsheet and the target space. It may suffer from the worldsheet and target space diffeomorphism an ..."
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Cited by 52 (3 self)
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The curved betagamma system is the chiral sector of a certain infinite radius limit of the nonlinear sigma model with complex target space. Naively it only depends on the complex structures on the worldsheet and the target space. It may suffer from the worldsheet and target space diffeomorphism
Integrability and Diffeomorphisms on Target Space ⋆
"... Abstract. We briefly review the concepts of generalized zero curvature conditions and integrability in higher dimensions, where integrability in this context is related to the existence of infinitely many conservation laws. Under certain assumptions, it turns out that these conservation laws are, in ..."
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Cited by 1 (1 self)
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, in fact, generated by a class of geometric target space transformations, namely the volumepreserving diffeomorphisms. We classify the possible conservation laws of field theories for the case of a threedimensional target space. Further, we discuss some explicit examples. Key words: integrability; zero
Algebraic structure of Lorentz and diffeomorphism anomalies
, 1993
"... The WessZumino consistency conditions for Lorentz and diffeomorphism anomalies are discussed by introducing an operator δ which allows to decompose the exterior spacetime derivative as a BRS commutator. 1 Supported in part by the ”Fonds zur Förderung der Wissenschaftlichen Forschung”, M008Lise ..."
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Cited by 4 (2 self)
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The WessZumino consistency conditions for Lorentz and diffeomorphism anomalies are discussed by introducing an operator δ which allows to decompose the exterior spacetime derivative as a BRS commutator. 1 Supported in part by the ”Fonds zur Förderung der Wissenschaftlichen Forschung”, M008Lise
A diffeomorphism anomaly in any dimension
, 2008
"... Fieldtheoretic pure gravitational anomalies only exist in 4k +2 dimensions. However, canonical quantization of nonfieldtheoretic systems may give rise to diffeomorphism anomalies in any number of dimensions. I present a simple example, where a higherdimensional generalization of the Virasoro alg ..."
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Fieldtheoretic pure gravitational anomalies only exist in 4k +2 dimensions. However, canonical quantization of nonfieldtheoretic systems may give rise to diffeomorphism anomalies in any number of dimensions. I present a simple example, where a higherdimensional generalization of the Virasoro
Manifestly Covariant Canonical Quantization of Gravity and Diffeomorphism Anomalies in Four Dimensions
, 2007
"... Canonical quantization of gravity requires knowledge about the representation theory of its constraint algebra, which is physically equivalent to the algebra of arbitrary 4diffeomorphisms. All interesting lowestenergy representations are projective, making the relevant algebra into a fourdimensio ..."
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Cited by 6 (6 self)
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dimensional generalization of the Virasoro algebra. Such diffeomorphism anomalies are invisible in field theory, because the relevant cocycles are functionals of the observer’s trajectory in spacetime. The multidimensional Virasoro algebra acts naturally in the phase space of arbitrary histories, with dynamics playing
Surface Registration by Optimization in Constrained Diffeomorphism Space
"... This work proposes a novel framework for optimization in the constrained diffeomorphism space for deformable surface registration. First the diffeomorphism space is modeled as a special complex functional space on the source surface, the Beltrami coefficient space. The physically plausible constra ..."
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This work proposes a novel framework for optimization in the constrained diffeomorphism space for deformable surface registration. First the diffeomorphism space is modeled as a special complex functional space on the source surface, the Beltrami coefficient space. The physically plau
Gauged Nonlinear Sigma Model and Boundary Diffeomorphism Algebra
, 1999
"... We consider ChernSimons gauged nonlinear sigma model with boundary which has a manifest bulk diffeomorphism invariance. We find that the Gauss’s law can be solved explicitly when the nonlinear sigma model is defined on the Hermitian symmetric space, and the original bulk theory completely reduces t ..."
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to a boundary nonlinear sigma model with the target space of Hermitian symmetric space. We also study the symplectic structure, compute the diffeomorphism algebra on the boundary, and find an (enlarged) Virasoro algebra with classical central term.
Ground ring of twodimensional string theory
, 1991
"... String theories with two dimensional spacetime target spaces are characterized by the existence of a “ground ring” of operators of spin (0, 0). By understanding this ring, one can understand the symmetries of the theory and illuminate the relation of the critical string theory to matrix models. The ..."
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Cited by 108 (1 self)
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String theories with two dimensional spacetime target spaces are characterized by the existence of a “ground ring” of operators of spin (0, 0). By understanding this ring, one can understand the symmetries of the theory and illuminate the relation of the critical string theory to matrix models
ConfigurationSpace Performance Anomaly Depiction
"... Complex distributed systems (like those based on J2EE platforms) are designed to perform well for a variety of application workloads and configuration settings. In practice, however, the system performance may not meet the expectation at all execution conditions. This short paper describes our resea ..."
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research on depicting performance anomaly manifestations over a large execution condition space for distributed systems. Specifically, we provide a case examination of our research target and describe our work in three areas—performance anomaly identification, configurationspace anomaly depiction
Fivebrane gravitational anomalies
 Nucl. Phys. B
, 2000
"... Minasian and Moore have proposed a mechanism to cancel the gravitational anomaly of the Mtheory fivebrane coming from diffeomorphisms acting on the normal bundle. This procedure is based on a modification of the conventional Mtheory ChernSimons term. We compactify this spacetime interaction to t ..."
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Cited by 6 (0 self)
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Minasian and Moore have proposed a mechanism to cancel the gravitational anomaly of the Mtheory fivebrane coming from diffeomorphisms acting on the normal bundle. This procedure is based on a modification of the conventional Mtheory ChernSimons term. We compactify this spacetime interaction
Results 1  10
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217