298 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
Design and performance of the ADMX SQUID-based microwave receiver
The Axion Dark Matter eXperiment (ADMX) was designed to detect ultra-weakly
interacting relic axion particles by searching for their conversion to
microwave photons in a resonant cavity positioned in a strong magnetic field.
Given the extremely low expected axion-photon conversion power we have
designed, built and operated a microwave receiver based on a Superconducting
QUantum Interference Device (SQUID). We describe the ADMX receiver in detail as
well as the analysis of narrow band microwave signals. We demonstrate the
sustained use of a SQUID amplifier operating between 812 and 860 MHz with a
noise temperature of 1 K. The receiver has a noise equivalent power of
1.1x10^-24 W/sqrt(Hz) in the band of operation for an integration time of
1.8x10^3 s.Comment: 8 pages, 12 figures, Submitted to Nuclear Inst. and Methods in
Physics Research,
Spinor Parallel Propagator and Green's Function in Maximally Symmetric Spaces
We introduce the spinor parallel propagator for maximally symmetric spaces in
any dimension. Then, the Dirac spinor Green's functions in the maximally
symmetric spaces R^n, S^n and H^n are calculated in terms of intrinsic
geometric objects. The results are covariant and coordinate-independent.Comment: 7 page
Magnetism in SQUIDs at Millikelvin Temperatures
We have characterized the temperature dependence of the flux threading dc
SQUIDs cooled to millikelvin temperatures. The flux increases as 1/T as
temperature is lowered; moreover, the flux change is proportional to the
density of trapped vortices. The data is compatible with the thermal
polarization of surface spins in the trapped fields of the vortices. In the
absence of trapped flux, we observe evidence of spin-glass freezing at low
temperature. These results suggest an explanation for the "universal" 1/f flux
noise in SQUIDs and superconducting qubits.Comment: 4 pages, 4 figure
Conformal Field Theory Correlators from Classical Field Theory on Anti-de Sitter Space II. Vector and Spinor Fields
We use the AdS/CFT correspondence to calculate CFT correlation functions of
vector and spinor fields. The connection between the AdS and boundary fields is
properly treated via a Dirichlet boundary value problem.Comment: 14 pages, LaTeX2e with amsmath,amsfonts packages; v2:interactions
section corrected, reference adde
Conformal Field Theory Correlators from Classical Scalar Field Theory on
We use the correspondence between scalar field theory on and a
conformal field theory on to calculate the 3- and 4-point functions of
the latter. The classical scalar field theory action is evaluated at tree
level.Comment: 9 pages, LaTeX2e with amsmath, amsfonts packages, section 2
rewritten, references adde
The massless gravitino and the AdS/CFT correspondence
We solve the Dirichlet boundary value problem for the massless gravitino on
space and compute the two-point function of the dual CFT
supersymmetry currents using the /CFT correspondence principle. We find
analogously to the spinor case that the boundary data for the massless
dimensional bulk gravitino field consists of only a dimensional
gravitino.Comment: 10 pages, RevTe
Some solutions of linearized 5-d gravity with brane
We consider linearized 5-d gravity in the Randall-Sundrum brane world. The
class of static solutions for linearized Einstein equations is found. Also we
obtaine wave solutions describing radiation from an imaginary point source
located at the Planck distance from the brane. We analyze the fields asymptotic
behavior and peculiarities of matter sources.Comment: Latex, 8 page
Three-point Green function of the stress-energy tensor in the AdS/CFT correspondence
We compute the 3-point function of the stress-energy tensor in the
d-dimensional CFT from the AdS_{d+1} gravity. For d=4 the coefficients of the
three linearly independent conformally covariant forms entering the 3-point
function are exactly the same as given by the free field computations in the
SYM just as expected from the known renormalization theorems. For
d=3 and d=6 our results give the value of the corresponding 3-point function in
the theories of strongly coupled superconformal scalar and (2,0)
tensor multiplets respectively.Comment: Latex, 13 pages, eq. (2.10) is correcte
The Operator Product Expansion for Wilson Loops and Surfaces in the Large N Limit
The operator product expansion for ``small'' Wilson loops in {\cal N}=4, d=4
SYM is studied. The OPE coefficients are calculated in the large N and g_{YM}^2
N limit by exploiting the AdS/CFT correspondence. We also consider Wilson
surfaces in the (0,2), d=6 superconformal theory. In this case, we find that
the UV divergent terms include a term proportional to the rigid string action.Comment: 22 pages LaTeX2e, using utarticle.cls (included) and AMS-LaTeX macro
- …