46 research outputs found
Holographic Perspectives On Models Of Moduli Stabilization In M-Theory
Recent holographic analyses on IIA and IIB models of moduli stabilization
have led to many interesting results. Here we extend this approach to M-Theory.
We consider both flux-stabilized models and non-perturbative stabilization
methods. We perform a holographic analysis to determine the spectrum of the
assumed dual to see its AdS/CFT implication. For the flux
stabilization, which relies on a large complex Chern-Simons invariant, moduli
have integer dimensions similar to the DGKT flux-stabilized model in type IIA,.
For the non-perturbative stabilization, the results are similar to racetrack
models in type IIB
Casimir Energy Stabilization of Standard Model Landscape in Dark Dimension
In this paper we present a realization of dark dimension. We consider the 5D
standard model coupling to gravity with one dimension compactified on an
orbifold, which is seen as dark dimension of size R. We stabilize the radion by
casimir effect wrapping around compact dimension and recover the neutrino mass
and 4D cosmological constant with the observed value. Orbifold can lead to a
natural resolution of chirality problem in 5D at low energy, which we briefly
discussed in the paper. Although we found that the radion mass is too light to
survive under solar system tests of GR, several screening mechanisms might give
us a solution, for example, Chameleon mechanism
Wheeler DeWitt States of a Charged AdS Black Hole
We solve the Wheeler DeWitt equation for the planar Reissner-Nordstr\"om-AdS
black hole in a minisuperspace approximation. We construct semiclassical
Wheeler DeWitt states from Gaussian wavepackets that are peaked on classical
black hole interior solutions. By using the metric component as a
clock, these states are evolved through both the exterior and interior
horizons. Close to the singularity, we show that quantum fluctuations in the
wavepacket become important, and therefore the classicality of the
minisuperspace approximation breaks down. Towards the AdS boundary, the Wheeler
DeWitt states are used to recover the Lorentzian partition function of the dual
theory living on this boundary. This partition function is specified by an
energy and a charge. Finally, we show that the Wheeler DeWitt states know about
the black hole thermodynamics, recovering the grand canonical thermodynamic
potential after an appropriate averaging at the black hole horizon.Comment: 28 pages with references, 1 figur
Pole skipping in holographic theories with gauge and fermionic fields
Using covariant expansions, recent work showed that pole skipping happens in
general holographic theories with bosonic fields at frequencies
, where is the highest integer spin in the
theory and takes all positive integer values. We revisit this formalism in
theories with gauge symmetry and upgrade the pole-skipping condition so that it
works without having to remove the gauge redundancy. We also extend the
formalism by incorporating fermions with general spins and interactions and
show that their presence generally leads to a separate tower of pole-skipping
points at frequencies , being the highest
half-integer spin in the theory and again taking all positive integer
values. We also demonstrate the practical value of this formalism using a
selection of examples with spins .Comment: 40 page
Symmetry breaking and consistent truncations from m5-branes wrapping a disc
We construct new supersymmetric solutions corresponding to M5-branes wrapped on a topological disc by turning on additional scalars in the background. The presence of such scalar fields breaks one of the U(1) isometries of the internal space, explicitly realising the breaking by the Stuckelberg mechanism observed previously. In addition, we construct a consistent truncation of maximal seven-dimensional gauged supergravity on the disc to five-dimensional Romans' SU (2) x U(1) gauged supergravity, allowing us to construct a plethora of new supergravity solutions corresponding to more general states in the dual SCFTs as well as solutions corresponding to M5-branes wrapping four-dimensional orbifolds
Symmetry breaking and consistent truncations from M5-branes wrapping a disc
We construct new supersymmetric solutions corresponding to M5-branes wrapped on a topological disc by turning on additional scalars in the background. The presence of such scalar fields breaks one of the U(1) isometries of the internal space, explicitly realising the breaking by the Stückelberg mechanism observed previously. In addition, we construct a consistent truncation of maximal seven-dimensional gauged supergravity on the disc to five-dimensional Romans’ SU(2) × U(1) gauged supergravity, allowing us to construct a plethora of new supergravity solutions corresponding to more general states in the dual SCFTs as well as solutions corresponding to M5-branes wrapping four-dimensional orbifolds
Symmetry Breaking and Consistent Truncations from M5-branes Wrapping a Disc
We construct new supersymmetric solutions corresponding to M5-branes wrapped
on a topological disc by turning on additional scalars in the background. The
presence of such scalar fields breaks one of the U(1) isometries of the
internal space, explicitly realising the breaking by the Stuckelberg mechanism
observed previously. In addition, we construct a consistent truncation of
maximal seven-dimensional gauged supergravity on the disc to five-dimensional
Romans' SU (2) x U(1) gauged supergravity, allowing us to construct a plethora
of new supergravity solutions corresponding to more general states in the dual
SCFTs as well as solutions corresponding to M5-branes wrapping four-dimensional
orbifolds.Comment: 27 pages + appendices, 4 figure
A Genome-Wide SNP Scan Reveals Novel Loci for Egg Production and Quality Traits in White Leghorn and Brown-Egg Dwarf Layers
Availability of the complete genome sequence as well as high-density SNP genotyping platforms allows genome-wide association studies (GWAS) in chickens. A high-density SNP array containing 57,636 markers was employed herein to identify associated variants underlying egg production and quality traits within two lines of chickens, i.e., White Leghorn and brown-egg dwarf layers. For each individual, age at first egg (AFE), first egg weight (FEW), and number of eggs (EN) from 21 to 56 weeks of age were recorded, and egg quality traits including egg weight (EW), eggshell weight (ESW), yolk weight (YW), eggshell thickness (EST), eggshell strength (ESS), albumen height(AH) and Haugh unit(HU) were measured at 40 and 60 weeks of age. A total of 385 White Leghorn females and 361 brown-egg dwarf dams were selected to be genotyped. The genome-wide scan revealed 8 SNPs showing genome-wise significant (P<1.51E-06, Bonferroni correction) association with egg production and quality traits under the Fisher's combined probability method. Some significant SNPs are located in known genes including GRB14 and GALNT1 that can impact development and function of ovary, but more are located in genes with unclear functions in layers, and need to be studied further. Many chromosome-wise significant SNPs were also detected in this study and some of them are located in previously reported QTL regions. Most of loci detected in this study are novel and the follow-up replication studies may be needed to further confirm the functional significance for these newly identified SNPs