2,666 research outputs found
A matrix model for a quantum hall droplet with manifest particle-hole symmetry
We find that a gauged matrix model of rectangular fermionic matrices (a
matrix version of the fermion harmonic oscillator) realizes a quantum hall
droplet with manifest particle-hole symmetry. The droplet consists of free
fermions on the topology of a sphere. It is also possible to deform the
Hamiltonian by double trace operators, and we argue that this device can
produce two body potentials which might lead the system to realize a fractional
quantum hall state on the sphere. We also argue that a single gauged fermionic
quantum mechanics of hermitian matrices realizes a droplet with an edge that
has CFT on it.Comment: 25 pages, uses JHEP format, young.sty (included). v2: Updated
references, typos correcte
Seeing More than Orange: Organizational Respect and Positive Identity Transformation in a Prison Context
This paper develops grounded theory on how receiving respect at work enables individuals to engage in positive identity transformation and the resulting personal and work-related outcomes. A company that employs inmates at a state prison to perform professional business-to-business marketing services provided a unique context for data collection. Our data indicate that inmates experienced respect in two distinct ways, generalized and particularized, which initiated an identity decoupling process that allowed them to distinguish between their inmate identity and their desired future selves and to construct transitional identities that facilitated positive change. The social context of the organization provided opportunities for personal and social identities to be claimed, respected, and granted, producing social validation and enabling individuals to feel secure in their transitional identities. We find that security in personal identities produces primarily performance-related outcomes, whereas security in the company identity produces primarily well-being-related outcomes. Further, these two types of security together foster an integration of seemingly incompatible identitiesââidentity holismââas employees progress toward becoming their desired selves. Our work suggests that organizations can play a generative role in improving the lives of their members through respect-based processes
âYou Never Get it Out of Your Bonesâ: The Christ-Haunted Security of Jean Louise âScoutâ Finch in Harper Lee\u27s \u3ci\u3eTo Kill a Mockingbird\u3c/i\u3e and \u3ci\u3eGo Set a Watchman\u3c/i\u3e
Harper Leeâs novels To Kill a Mockingbird and Go Set a Watchman emphasize the struggle of mid-twentieth century Southern identity as Southerners searched for security, and she does so particularly in her main character, Jean Louise âScoutâ Finch. Throughout the novels, Jean Louise fights to find a balance within herself as she learns to decide what to accept or reject from her Southern culture. Using New Historicism and Southern Female Gender Studies, this thesis analyzes the character development of Jean Louise âScoutâ in the novels and the traits she consistently acceptsâdiscrimination and respect, honor of family, graceâand the ones she rejectsâtraditional Southern femininity, an âUs vs. Themâ mentality (by recognizing her âcolorblindnessâ and the âOther(s)â), and legalism. Moreover, Jean Louise âScoutâ appears to find this balance between accepting and rejecting these traits due to her innate âChrist-hauntedâ nature (a term created by Flannery OâConnor); this ability is her subconscious and theological understanding that every man can be âwhole.â In the end, this thesis not only discusses this specific type of character development within Jean Louise, but it also supports how Watchmanâdespite its more negative receptionâis a key piece to properly reading this character
Aspects of emergent geometry in the AdS/CFT context
We study aspects of emergent geometry for the case of orbifold superconformal
field theories in four dimensions, where the orbifolds are abelian within the
AdS/CFT proposal. In particular, we show that the realization of emergent
geometry starting from the N=4 SYM theory in terms of a gas of particles in the
moduli space of vacua of a single D3 brane in flat space gets generalized to a
gas of particles on the moduli space of the corresponding orbifold conformal
field theory (a gas of D3 branes on the orbifold space). Our main purpose is to
show that this can be analyzed using the same techniques as in the N=4 SYM case
by using the method of images, including the measure effects associated to the
volume of the gauge orbit of the configurations. This measure effect gives an
effective repulsion between the particles that makes them condense into a
non-trivial vacuum configuration, and it is exactly these configurations that
lead to the geometry of X in the AdS x X dual field theoryComment: 24 page
Spinning String and Giant Graviton in Electric/Magnetic Field Deformed
We apply the transformation of mixing azimuthal and internal coordinate or
mixing time and internal coordinate to the 11D M-theory with a stack of
M2-branes M2-branes, then, through the mechanism of Kaluza-Klein
reduction and a series of the T duality we obtain the corresponding background
of a stack of D1-branes D5-branes which, in the near-horizon limit,
becomes the magnetic or electric Melvin field deformed . We find the giant graviton solution in the deformed spacetime and see
that the configuration whose angular momentum is within a finite region could
has a fixed size and become more stable than the point-like graviton, in
contrast to the undeformed giant graviton which only exists when its angular
momentum is a specific value and could have arbitrary size. We discuss in
detail the properties of how the electric/magnetic Melvin field will affect the
size of the giant gravitons. We also adopt an ansatz to find the classical
string solutions which are rotating in the deformed with an angular
momentum in the rotation plane. The spinning string and giant graviton
solutions we obtained show that the external magnetic/electric flux will
increase the solution energy. Therefore, from the AdS/CFT point of view, the
corrections of the anomalous dimensions of operators in the dual field theory
will be positive. Finally, we also see that the spinning string and giant
graviton in the near-horizon spacetime of Melvin field deformed D5-branes
background have the similar properties as those in the deformed .Comment: Latex 21 pages, slightly detail calculation
Quantizing Open Spin Chains with Variable Length: an example from Giant Gravitons
We study an XXX open spin chain with variable number of sites, where the
variability is introduced only at the boundaries. This model arises naturally
in the study of Giant Gravitons in the AdS/CFT correspondence. We show how to
quantize the spin chain by mapping its states to a bosonic lattice of finite
length with sources and sinks of particles at the boundaries. Using coherent
states, we show how the Hamiltonian for the bosonic lattice gives the correct
description of semiclassical open strings ending on Giant Gravitons.Comment: 4 pages. v2: updated reference
Bubbling 1/2 BPS Geometries and Penrose Limits
We discuss how to take a Penrose limit in bubbling 1/2 BPS geometries at the
stage of a single function z(x_1,x_2,y). By starting from the z of the AdS_5 x
S^5 we can directly derive that of the pp-wave via the Penrose limit. In that
time the function z for the pp-wave with 1/R^2-corrections is obtained. We see
that it surely reproduces the pp-wave with 1/R^2 terms. In addition we consider
the Penrose limit in the configuration of the concentric rings.Comment: 15 pages, 3 figures, LaTeX, v2:higher order corrections are added,
typos corrected and references added, version to appear in PR
1/2 BPS Geometries of M2 Giant Gravitons
We construct the general 1/2 BPS M2 giant graviton solutions asymptotic to
the eleven-dimensional maximally supersymmetric plane wave background, based on
the recent work of Lin, Lunin and Maldacena. The solutions have null
singularity and we argue that it is unavoidable to have null singularity in the
proposed framework, although the solutions are still physically relevant. They
involve an arbitrary function F(x) which is shown to have a correspondence to
the 1/2 BPS states of the BMN matrix model. A detailed map between the 1/2 BPS
states of both sides is worked out.Comment: 21 pages and 1 figure. v2: references added, comments adde
Civil Wars and Economic Growth in Sub-Saharan Africa1
This paper uses panel data from a sample of Sub-Saharan African (SSA) countries over the 1960-96 period and both Instrumental Variables (IV) and dynamic panel data (DPD98) estimator to investigate the effect of the incidence and severity of civil war on the growth rate of per capita income. We find that both factors have a robust, negative and statistically significant effect on the growth rate of per capita income. We find that civil war affects the growth rate of income partly through reduced investment in physical capital. However, if one does not control for the correlation between civil war incidence and other growth factors, the estimated effect of civil war on economic growth is not robust. We are unable to find any significant relationship between the level of income and the incidence of civil war in SSA countries after controlling for other variables that are correlated with income level
Identification of the RGG Box Motif in Shadoo: RNA-Binding and Signaling Roles?
Using comparative genomics and in-silico analyses, we previously identified a new member of the prion-protein (PrP) family, the gene SPRN, encoding the protein Shadoo (Sho), and suggested its functions might overlap with those of PrP. Extended bioinformatics and conceptual biology studies to elucidate Shoâs functions now reveal Sho has a conserved RGG-box motif, a well-known RNA-binding motif characterized in proteins such as FragileX Mental Retardation Protein. We report a systematic comparative analysis of RGG-box containing proteins which highlights the motifâs functional versatility and supports the suggestion that Sho plays a dual role in cell signaling and RNA binding in brain. These findings provide a further link to PrP, which has well-characterized RNA-binding properties
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