58 research outputs found
Exploring causality in braneworld/cutoff holography via holographic scattering
Holography with branes and/or cutoff surfaces presents a promising approach
to studying quantum gravity beyond asymptotically anti-de Sitter spacetimes.
However, this generalized holography is known to face several inconsistencies,
including potential violations of causality and fundamental entropic
inequalities. In this work, we address these challenges by investigating the
bulk scattering process and its holographic realization. Specifically, we
propose that the information on a brane/cutoff surface propagates according
to the induced light cones originating from a fictitious asymptotic boundary
behind , rather than the conventional ones originating from a point on .
Additionally, we establish the validity of the connected wedge theorem for
generalized holography with induced light cones. We also demonstrate that
entropic inequalities remain valid within the induced causal diamonds. While
the induced light cone seemingly permits superluminal signaling, we argue that
this causality violation can be an artifact of state preparation for radially
propagating excitations, rather than local operator excitations on .Comment: 41 pages, 16 figure
Time-Domain Universal Linear-Optical Operations for Universal Quantum Information Processing
We demonstrate universal and programmable three-mode linear optical
operations in the time domain by realizing a scalable dual-loop optical circuit
suitable for universal quantum information processing (QIP). The
programmability, validity, and deterministic operation of our circuit are
demonstrated by performing nine different three-mode operations on
squeezed-state pulses, fully characterizing the outputs with variable
measurements, and confirming their entanglement. Our circuit can be scaled up
just by making the outer loop longer and also extended to universal quantum
computers by incorporating feedforward systems. Thus, our work paves the way to
large-scale universal optical QIP
Programmable time-multiplexed squeezed light source
One of the leading approaches to large-scale quantum information processing
(QIP) is the continuous-variable (CV) scheme based on time multiplexing (TM).
As a fundamental building block for this approach, quantum light sources to
sequentially produce time-multiplexed squeezed-light pulses are required;
however, conventional CV TM experiments have used fixed light sources that can
only output the squeezed pulses with the same squeezing levels and phases. We
here demonstrate a programmable time-multiplexed squeezed light source that can
generate sequential squeezed pulses with various squeezing levels and phases at
a time interval below 100 ns. The generation pattern can be arbitrarily chosen
by software without changing its hardware configuration. This is enabled by
using a waveguide optical parametric amplifier and modulating its continuous
pump light. Our light source will implement various large-scale CV QIP tasks.Comment: 14 pages, 7 figure
Diagnostic approach for patients with unidentified fever according to the classical criteria of fever of unknown origin in the field of autoimmune disorders
ArticleImmunological medicine. 42(4): 176-184 (2019)journal articl
Dramatic Dietary Shift Maintains Sequestered Toxins in Chemically Defended Snakes
Unlike other snakes, most species of Rhabdophis possess glands in their dorsal skin, sometimes limited to the neck, known as nucho-dorsal and nuchal glands, respectively. Those glands contain powerful cardiotonic steroids known as bufadienolides, which can be deployed as a defense against predators. Bufadienolides otherwise occur only in toads (Bufonidae) and some fireflies (Lampyrinae), which are known or believed to synthesize the toxins. The ancestral diet of Rhabdophis consists of anuran amphibians, and we have shown previously that the bufadienolide toxins of frog-eating species are sequestered from toads consumed as prey. However, one derived clade, the Rhabdophis nuchalis Group, has shifted its primary diet from frogs to earthworms. Here we confirm that the worm-eating snakes possess bufadienolides in their nucho-dorsal glands, although the worms themselves lack such toxins. In addition, we show that the bufadienolides of R. nuchalis Group species are obtained primarily from fireflies. Although few snakes feed on insects, we document through feeding experiments, chemosensory preference tests, and gut contents that lampyrine firefly larvae are regularly consumed by these snakes. Furthermore, members of the R. nuchalis Group contain compounds that resemble the distinctive bufadienolides of fireflies, but not those of toads, in stereochemistry, glycosylation, acetylation, and molecular weight. Thus, the evolutionary shift in primary prey among members of the R. nuchalis Group has been accompanied by a dramatic shift in the source of the species’ sequestered defensive toxins
Influenza B associated paediatric acute respiratory infection hospitalization in central vietnam
Background: Influenza B is one of the major etiologies for acute respiratory infections (ARI) among children worldwide; however, its clinical-epidemiological information is limited. We aimed to investigate the hospitalization incidence and clinical-epidemiological characteristics of influenza B-associated paediatric ARIs in central Vietnam. Methods: We collected clinical-epidemiological information and nasopharyngeal swabs from ARI children hospitalized at Khanh Hoa General Hospital, Nha Trang, Vietnam from February 2007 through June 2013. Nasopharyngeal samples were screened for 13 respiratory viruses using Multiplex-PCRs. Influenza B-confirmed cases were genotyped by Haemagglutinin gene sequencing. We analyzed the clinical-epidemiological characteristics of influenza B Lineages (Victoria/Yamagata) and WHO Groups. Results: In the pre-A/H1N1pdm09 period, influenza B-associated ARI hospitalization incidence among children under five was low, ranging between 14.7 and 80.7 per 100 000 population. The incidence increased to between 51.4 and 330 in the post-A/H1N1pdm09. Influenza B ARI cases were slightly older with milder symptoms. Both Victoria and Yamagata lineages were detected before the A/H1N1pdm09 outbreak; however, Victoria lineage became predominant in 2010-2013 (84% Victoria vs 16% Yamagata).Victoria and Yamagata lineages did not differ in demographic and clinical characteristics. In Victoria lineage, Group1 ARI cases were clinically more severe compared to Group5, presenting a greater proportion of wheeze, tachypnea, and lower respiratory tract infection. Conclusions: The current results highlight the increased incidence of influenza B-related ARI hospitalization among children in central Vietnam in the post-A/H1N1pdm09 era. Furthermore,the difference in clinical severity between Victoria lineage Group1 and 5 implies the importance of influenza B genetic variation on clinical presentation
- …