Results 1  10
of
498
Axiomatic quantum field theory in curved spacetime
, 2008
"... The usual formulations of quantum field theory in Minkowski spacetime make crucial use of features—such as Poincare invariance and the existence of a preferred vacuum state—that are very special to Minkowski spacetime. In order to generalize the formulation of quantum field theory to arbitrary globa ..."
Abstract

Cited by 689 (18 self)
 Add to MetaCart
globally hyperbolic curved spacetimes, it is essential that the theory be formulated in an entirely local and covariant manner, without assuming the presence of a preferred state. We propose a new framework for quantum field theory, in which the existence of an Operator Product Expansion (OPE) is elevated
Some properties of Noether charge and a proposal for dynamical black hole entropy
 Phys. Rev
, 1994
"... We consider a general, classical theory of gravity with arbitrary matter fields in n dimensions, arising from a diffeomorphism invariant Lagrangian, L. We first show that L always can be written in a “manifestly covariant ” form. We then show that the symplectic potential current (n − 1)form, Θ, an ..."
Abstract

Cited by 326 (4 self)
 Add to MetaCart
, and the symplectic current (n − 1)form, ω, for the theory always can be globally defined in a covariant manner. Associated with any infinitesimal diffeomorphism is a Noether current (n − 1)form, J, and corresponding Noether charge (n − 2)form, Q. We derive a general “decomposition formula ” for Q. Using
Covariance and contravariance: Conflict without a cause
 ACM Transactions on Programming Languages and Systems
, 1995
"... In typetheoretic research on objectoriented programming, the issue of “covarianceversus contravariance ” is atopicof continuing debate. In this short notewe argue that covariance and contravariance appropriately characterize two distinct and independent mechanisme. The socalled contravariance r ..."
Abstract

Cited by 140 (9 self)
 Add to MetaCart
particular cases). Therefore, covariance and contravariance are not opposing views, but distinct concepts that each have their place inobjectoriented systems. Both can (and should) be integrated in a typesafe manner in objectoriented languages. We also show that the independence of the two mechanisms
Symmetry and Covariance of Nonrelativistic Quantum Mechanics
, 2000
"... On the basis of a 5dimensional form of spacetime transformations nonrelativistic quantum mechanics is reformulated in a manifestly covariant manner. The resulting covariance resembles that of the conventional relativistic quantum mechanics. 1 ..."
Abstract
 Add to MetaCart
On the basis of a 5dimensional form of spacetime transformations nonrelativistic quantum mechanics is reformulated in a manifestly covariant manner. The resulting covariance resembles that of the conventional relativistic quantum mechanics. 1
IFTP.072/2000 Covariant Quantization of the Superstring
, 2000
"... After reviewing the GreenSchwarz superstring using the approach of Siegel, the superstring is covariantly quantized by constructing a BRST operator from the fermionic constraints and a bosonic pure spinor ghost variable. Physical massless vertex operators are constructed and, for the first time, N ..."
Abstract
 Add to MetaCart
point tree amplitudes are computed in a manifestly tendimensional superPoincaré covariant manner. Quantization can be generalized to curved supergravity backgrounds and the vertex operator for fluctuations around AdS5 ×S 5 is explicitly constructed. This review is written in a selfcontained manner
Covariant Quantization of the GreenSchwarz Superstring in a CalabiYau Background”, Nucl. Phys. B431
, 1994
"... After adding a scalar chiral boson to the usual superspace variables, the fourdimensional GreenSchwarz superstring is quantized in a manifestly SO(3,1) superPoincaré covariant manner. The constraints are all firstclass and form an N=2 superconformal algebra with c = −3. Since the CalabiYau degr ..."
Abstract

Cited by 63 (20 self)
 Add to MetaCart
After adding a scalar chiral boson to the usual superspace variables, the fourdimensional GreenSchwarz superstring is quantized in a manifestly SO(3,1) superPoincaré covariant manner. The constraints are all firstclass and form an N=2 superconformal algebra with c = −3. Since the Calabi
The covariant perturbative approach to cosmic microwave background anisotropies
"... The EhlersEllis 1+3 formulation of covariant hydrodynamics, when supplemented with covariant radiative transport theory, gives an exact, physically transparent description of the physics of the cosmic microwave background radiation (CMB). Linearisation around a FriedmannRobertsonWalker (FRW) univ ..."
Abstract

Cited by 3 (0 self)
 Add to MetaCart
and understanding the anisotropy of the CMB. Particular emphasis is placed on the inclusion of polarization in a fully covariant manner. With this inclusion, the covariant perturbative approach offers a complete description of linearised CMB physics in an almostFRW universe. 1
IFTP.005/2000 SuperPoincaré Covariant Quantization of the Superstring
, 2000
"... Using pure spinors, the superstring is covariantly quantized. For the first time, massless vertex operators are constructed and scattering amplitudes are computed in a manifestly tendimensional superPoincaré covariant manner. Quantizable nonlinear sigma model actions are constructed for the super ..."
Abstract
 Add to MetaCart
Using pure spinors, the superstring is covariantly quantized. For the first time, massless vertex operators are constructed and scattering amplitudes are computed in a manifestly tendimensional superPoincaré covariant manner. Quantizable nonlinear sigma model actions are constructed
IFTP.063/2002 ICTP Lectures on Covariant Quantization of the Superstring
, 2002
"... These ICTP Trieste lecture notes review the pure spinor approach to quantizing the superstring with manifest D=10 superPoincaré invariance. The first section discusses covariant quantization of the superparticle and gives a new proof of equivalence with the BrinkSchwarz superparticle. The second s ..."
Abstract
 Add to MetaCart
section discusses the superstring in a flat background and shows how to construct vertex operators and compute tree amplitudes in a manifestly superPoincaré covariant manner. And the third section discusses quantization of the superstring in curved backgrounds which can include RamondRamond flux.
Covariates and time in the autologistic model
, 2007
"... An issue that arises in a number of environmental monitoring situations is that of detecting and modeling changes in the structure of the underlying scientific process that govern the observable phenomena of interest. The problem structure considered in this article is one in which a fixed spatial d ..."
Abstract

Cited by 2 (2 self)
 Add to MetaCart
domain is observed over a short to moderate sequence of points in time. Ideally, a statistical model used in this type of situation contains parameter values, for which we can assess change over time, that correspond to components of the underlying scientific process in an interpretable manner. A
Results 1  10
of
498