227 research outputs found
Note on the boundary terms in AdS/CFT correspondence for Rarita-Schwinger field
In this letter the boundary problem for massless and massive Rarita-Schwinger
field in the AdS/CFT correspondence is considered. The considerations are along
the lines of a paper by Henneaux (hep-th/9902137) and are based on the
requirement the solutions to be a stationary point for the action functional.
It is shown that this requirement, along with a definite asymptotic behavior of
the solutions, fixes the boundary term that must be added to the initial
Rarita-Schwinger action. It is also shown that the boundary term reproduce the
known two point correlation functions of certain local operators in CFT living
on the boundary.Comment: 12 pages, one more refernce added, some typos correcte
Gauge Dependence in the AdS/CFT Correspondence
We consider the AdS space formulation of the classical dynamics deriving from
the Stueckelberg Lagrangian. The on-shell action is shown to be free of
infrared singularities as the vector boson mass tends to zero. In this limit
the model becomes Maxwell theory formulated in an arbitrary covariant gauge.
Then we use the AdS/CFT correspondence to compute the two-point correlation
functions on the boundary. It is shown that the gauge dependence concentrates
on the contact terms.Comment: 13 pages, REVTEX, misprints in the abstract corrected. Minor changes.
Version to be publishe
Perturbative and non-perturbative aspects of pure N=1 super Yang-Mills theory from wrapped branes
The Maldacena-Nunez solution is generalized to include a number of integration constants, one of which controls the resolution of the singularity of the wrapped D5-brane background. Some features of the dual pure N=1 super Yang-Mills (SYM) theory are calculated, amongst which the gluino condensate, the beta function of the gauge coupling and a brane probe potential, which is related to the Veneziano-Yankielowicz effective potential. Each integration constant has a precise meaning in the dual SYM theory, e.g., the amount of non-perturbative SYM physics captured by the gravity configuration is described by the singularity resolution parameter
Antisymmetric Wilson loops in N= 4 SYM: from exact results to non-planar corrections
Indexación: Scopus.A.C. and A.F. were supported by Fondecyt # 1160282. supported by the I.N.F.N., research initiative STEFI.We consider the vacuum expectation values of 1/2-BPS circular Wilson loops in N= 4 super Yang-Mills theory in the totally antisymmetric representation of the gauge group U(N) or SU(N). Localization and matrix model techniques provide exact, but rather formal, expressions for these expectation values. In this paper we show how to extract the leading and sub-leading behavior in a 1/N expansion with fixed ’t Hooft coupling starting from these exact results. This is done by exploiting the relation between the generating function of antisymmetric Wilson loops and a finite-dimensional quantum system known as the truncated harmonic oscillator. Sum and integral representations for the 1/N terms are provided. © 2018, The Author(s).https://link.springer.com/article/10.1007%2FJHEP08%282018%2914
Regular and Irregular Boundary Conditions in the AdS/CFT Correspondence
We expand on Klebanov and Witten's recent proposal for formulating the
AdS/CFT correspondence using irregular boundary conditions. The proposal is
shown to be correct to any order in perturbation theory.Comment: 7 pages, typos correcte
Massive Spinors and dS/CFT Correspondence
Using the map between free massless spinors on d+1 dimensional Minkowski
spacetime and free massive spinors on , we obtain the boundary term
that should be added to the standard Dirac action for spinors in the dS/CFT
correspondence. It is shown that this map can be extended only to theories with
vertex ({\bar\p}\p)^2 but arbitrary . In the case of scalar field
theories such an extension can be made only for with vertices
, and respectively
The Polyakov Loop of Anti-symmetric Representations as a Quantum Impurity Model
The Polyakov loop of an operator in the anti-symmetric representation in N=4
SYM theory on spacial R^3 is calculated, to leading order in 1/N and at large
't Hooft coupling, by solving the saddle point equations of the corresponding
quantum impurity model. Agreement is found with previous results from the
supergravity dual, which is given by a D5-brane in an asymptotically AdS_5 x
S^5 black brane background. It is shown that the azimuth angle, at which the
dual D5-brane wraps the S^5, is related to the spectral asymmetry angle in the
spectral density associated with the Green's function of the impurity fermions.
Much of the calculation also applies to the Polyakov loop on spacial S^3 or
H^3.Comment: 20 pages, 2 figures, v2: references added and small changes in text,
v3: extended to Polyakov loops on spacial R^3, S^3 or H^
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