1,376 research outputs found
Time dependence of entanglement entropy on the fuzzy sphere
We numerically study the behaviour of entanglement entropy for a free scalar
field on the noncommutative ("fuzzy") sphere after a mass quench. It is known
that the entanglement entropy before a quench violates the usual area law due
to the non-local nature of the theory. By comparing our results to the ordinary
sphere, we find results that, despite this non-locality, are compatible with
entanglement being spread by ballistic propagation of entangled quasi-particles
at a speed no greater than the speed of light. However, we also find that, when
the pre-quench mass is much larger than the inverse of the short-distance
cutoff of the fuzzy sphere (a regime with no commutative analogue), the
entanglement entropy spreads faster than allowed by a local model.Comment: 1+14 pages, 8 figures v2: References added, matches published versio
Mutual information on the fuzzy sphere
We numerically calculate entanglement entropy and mutual information for a
massive free scalar field on commutative (ordinary) and noncommutative (fuzzy)
spheres. We regularize the theory on the commutative geometry by discretizing
the polar coordinate, whereas the theory on the noncommutative geometry
naturally posseses a finite and adjustable number of degrees of freedom. Our
results show that the UV-divergent part of the entanglement entropy on a fuzzy
sphere does not follow an area law, while the entanglement entropy on a
commutative sphere does. Nonetheless, we find that mutual information (which is
UV-finite) is the same in both theories. This suggests that nonlocality at
short distances does not affect quantum correlations over large distances in a
free field theory.Comment: 16 pages, 10 figures. Fixed minor typos, references updated,
discussion slightly expande
The Pselaphinae (Coleoptera, Staphylinidae) of the Maltese Archipelago
Fourteen pselaphines are recorded from the Maltese Islands three of
which are recorded for the first time: Rybaxis longicornis, Tychus jacquelinii, and
T. pici. Tychus pici, a North African species that is so far known only from Algeria
and Tunisia, is here recorded for the first time for the European territory. Locality
and collecting data that were lacking for three other species recorded from Malta
in the recently published catalogue of Palaearctic Coleoptera, is also provided. The
record of Euplectus brunneus is incorrect and most likely should refer to E. corsicus.
An illustrated dichotomous key is included to facilitate identification of Maltese
pselaphines.peer-reviewe
PERBEDAAN BENTUK TES DALAM HASIL BELAJAR K3LH DI SMK YPK KESATUAN, JAKARTA SELATAN
ABSTRAK
Sabella. The Differences type test in outcomes K3LH in SMK YPK Kesatuan. Skrispsi, Jakarta: Study Program of Office Administration Education, Major Economy and Administration. Faculty Economy, State University of Jakarta, 2013.
This study aims to determine the differences in learning outcomes K3LH significant between the groups using a test with a limited form of essay test group using multiple forms plihan. population in this study were all students of SMK YPK X Unity South Jakarta which consists of 4 classes. Samples randomly taken two classes (60 students) at random, AP1 X class (30 students) using limited test form essays and class X AP2 (30 people) uses a multiple choice test. This type of research is experimental research and the types of instruments used in the form of tests of cognitive learning outcomes. The results of this study showed the average value of daily test essai limited test group was 63.33 and 78.50 for groups of multiple choice. Highest scoring essays form a limited test group of 80 and groups of 95 multiple choice. while the lowest score essai limited test group of 45 and groups of 55 multiple-choice tests. The results of the normality of finite group essay limited L calculate = 0.129 <L = 0161, then Ho is accepted at significance
level of 0.05 so that the data is normally distributed. While the multiple-choice test for normality groups namely L table calculate = 0.159 t with a level of 0.05. Then the price is known t0, 975 with dk= 58 from the list of students is 2,02. Testing criteria Ho if t calculate T
. After testing hipotes held at a price of t obtained from the calculation of 6.408 which was
located outside the reception area of Ho between -2.02 and 2.02 it can be table table concluded that the null hypothesis is rejected. It means that there is a difference in the form of test results to learn K3LH (Safety, Security, Health and Environment) and a multiple choice test is significantly higher than the form of essay tests is limited
Entanglement entropy on the fuzzy sphere
We obtain entanglement entropy on the noncommutative (fuzzy) two-sphere. To
define a subregion with a well defined boundary in this geometry, we use the
symbol map between elements of the noncommutative algebra and functions on the
sphere. We find that entanglement entropy is not proportional to the length of
the region's boundary. Rather, in agreement with holographic predictions, it is
extensive for regions whose area is a small (but fixed) fraction of the total
area of the sphere. This is true even in the limit of small noncommutativity.
We also find that entanglement entropy grows linearly with N, where N is the
size of the irreducible representation of SU(2) used to define the fuzzy
sphere.Comment: 18 pages, 7 figures. v3 to appear in JHEP. Clarified statements about
UV/IR mixing and interpretation in terms of degrees of freedom on the fuzzy
sphere vs. matrix degrees of freedom, fixed some typos and added reference
Evolutionary algorithms: Overview and applications to European transport
The present paper aims to analyse the research potential of Evolutionary Algorithms (EAs) in the light of their possible applications in the space-economy. For this purpose the first part of the paper will be devoted to an overview and illustration of EAs, also in comparison with other recent tools emerging form bio-computing, like Neural Networks (NNs). The second part of the paper will then focus on empirical applications concerning analyses and forecasts of European freight transport flows (at a regional level). In this context, the results stemming from an integrated approach combining EAs with NNs will be compared with those from conventional methodologies, like logit models, as well as with the "usual" NN models. We will analyze the sensitivity of various results by using different environmental policy on scenarios on European transport. The empirical experiments highlight the advantages and limitations of these approaches from both a methodological and empirical viewpoint, by offering a plausible range of values of outcomes that may be useful for planners and operators in this field.
A Cardy formula for off-diagonal three-point coefficients; or, how the geometry behind the horizon gets disentangled
In the AdS/CFT correspondence eternal black holes can be viewed as a specific
entanglement between two copies of the CFT: the thermofield double. The
statistical CFT Wightman function can be computed from a geodesic between the
two boundaries of the Kruskal extended black hole and therefore probes the
geometry behind the horizon. We construct a kernel for the AdS3/CFT2 Wightman
function that is independent of the entanglement. This kernel equals the
average off-diagonal matrix element squared of a primary operator. This allows
us to compute the Wightman function for an arbitrary entanglement between the
double copies and probe the emergent geometry between a left- and right-CFT
that are not thermally entangled.Comment: 18 pages, 8 figures v2: Added appendix on spatial dependence, minor
changes, matches published versio
Partnering with Families & Other Natural Supports on Individualized Service Plans (ISPs)
Positive familial support can be a good resource for young people during their transition years. However, family involvement and support during the transition years for young adults with mental health conditions can be complicated by changing family dynamics. This tip sheet describes what we know about partnering with families, offers best practices when working with young adults and their families and providers some resources to learn more
Introducing AIDS Education in Connecticut Schools
Most of the nation \u27s schoolchildren are not infected with the AIDS virus (HIV). Since AIDS is a preventable disease, no one need become infected. In order to protect themselves, everyone, including children, must understand exactly how HIV is and is not contracted. The message of prevention, however, is controversial, since it must include advice on safer sex and drug use.
In 1984, Connecticut was forced to face the issue of a child with HIV infection entering school. The state responded by creating guidelines for prevention of disease transmission in schools and by subsequently developing an AIDS curriculum. Obstacles to AIDS education in school include inability to decide upon curricular content as well as political concerns on the part of school administrators. In Connecticut, committee representatives of state and local agencies of health and education and of academia are working together to overcome these obstacles
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