7,978 research outputs found
Response Function of Asymmetric Nuclear Matter
The charge longitudinal response function is examined in the framework of the
random-phase approximation in an isospin-asymmetric nuclear matter where proton
and neutron densities are different. This asymmetry changes the response
through both the particle-hole interaction and the free particle-hole
polarization propagator. We discuss these two effects on the response function
on the basis of our numerical results in detail.Comment: 8 pages, PlainTeX file, 4 PostScript figures, uuencode
Listen to the Voices of Maasai Women in Kenya: Ensuring the Well-Being of their Families through Collective Actions
This is an ethnographic study that provides insight into grassroots activities managed by Maasai women leaders in the Narok area of Kenya. Four womenâs narratives were used as a basis of analysis to demonstrate their roles in facilitating grassroots activities to improve village womenâs well-being despite gender discrimination and multidimensional constraints. The womenâs group leaders commented that low literacy had a negative influence on Maasai womenâs development; however, the issue of illiteracy could be overcome through cooperative learning during women group activities in their village. The results showed that the womenâs group leaders played a facilitative role in improving womenâs situations and everyday lives through knowledge sharing and collective social actions. An analysis of the narratives of four women demonstrated that: each woman has a unique experience of grassroots development activities that should be valued; and village women promote womenâs empowerment and develop forms of resistance to gender inequality by accommodating menâs self-pride and different gender roles to ensure a harmonious society
String Creation and Monodromy from Fractional D-branes on ALE spaces
We investigate the anomalous creation of fundamental strings using the
boundary state formalism of fractional D-branes on ALE spaces in the orbifold
limit. The open string Witten index plays a crucial role in this calculation
and so the result remains unchanged even if we blow up the orbifold
geometrically, matching the anomaly inflow argument. Further we consider the
quiver gauge theories on such fractional D3-branes and see that the string
creation mechanism determines 1-loop logarithmic monodromy of these gauge
theories. Also we comment on the relation of D(-1)-D3 amplitude to the 1-loop
beta function.Comment: Latex,20 pages,minor changes and reference adde
Holographic Spacetimes as Quantum Circuits of Path-Integrations
We propose that holographic spacetimes can be regarded as collections of
quantum circuits based on path-integrals. We relate a codimension one surface
in a gravity dual to a quantum circuit given by a path-integration on that
surface with an appropriate UV cut off. Our proposal naturally generalizes the
conjectured duality between the AdS/CFT and tensor networks. This largely
strengthens the surface/state duality and also provides a holographic
explanation of path-integral optimizations. For static gravity duals, our new
framework provides a derivation of the holographic complexity formula given by
the gravity action on the WDW patch. We also propose a new formula which
relates numbers of quantum gates to surface areas, even including time-like
surfaces, as a generalization of the holographic entanglement entropy formula.
We argue the time component of the metric in AdS emerges from the density of
unitary quantum gates in the dual CFT. Our proposal also provides a heuristic
understanding how the gravitational force emerges from quantum circuits.Comment: 39 pages, 13 figures, latex; v2: appendix B added for an explicit
analysis of path-integral quantum circuits, counting scrambling quantum gates
clarified, references included; v3: a reference adde
Capillary zone electrophoretic studies of ion association between inorganic anions and tetraalkylammonium ions in aqueous-dioxane media
Ion association between inorganic anions and symmetrical tetraalkylammonium ions, R4N+ (R = Me, Et, Pr, n-Bu, n-Am, and 2-methyl butyl {isoamyl = iAm}) was investigated using ordinary silica capillary by capillary zone electrophoresis. An improved version of the Williams-Vigh method was used for the first time to measure the mobilities of the inorganic anions. Plots of log K-ass against log dielectric constant in various media, revealed a smaller change in K-ass compared to dielectric constant. These plots suggest that the Bjerrum's equation is inadequate in accounting for the associations of ions in a CZE setup. </p
Ballistic reflection at a side-gate in a superconductor-semiconductor-superconductor structure
We have fabricated a sub-micron-sized structure consisting of an InAs-based
2DEG, two narrow Nb leads and a gate, where the indirect ballistic transport
between the non-oppositely superconducting contacts can be controlled by the
voltage applied to the gate. This new kind of tuneable junction can be used for
applications and allows several fundamental questions related to the transport
mechanism to be studied. First results of experiments carried out in this
respect are presented.Comment: 6 pages, 4 eps-figure
Free Yang-Mills vs. Toric Sasaki-Einstein
It has been known that the Bekenstein-Hawking entropy of the black hole in
AdS_5 * S^5 agrees with the free N=4 super Yang-Mills entropy up to the famous
factor 4/3. This factor can be interpreted as the ratio of the entropy of the
free Yang-Mills to the entropy of the strongly coupled Yang-Mills. In this
paper we compute this factor for infinitely many N=1 SCFTs which are dual to
toric Sasaki-Einstein manifolds. We observed that this ratio always takes
values within a narrow range around 4/3. We also present explicit values of
volumes and central charges for new classes of toric Sasaki-Einstein manifolds.Comment: 18 pages, 7 figures, latex, comments and a reference added (v2),
explanation improved and references added (v3), a reference added (v4
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