3,902 research outputs found
The Tensor Rank of the Tripartite State }
Tensor rank refers to the number of product states needed to express a given
multipartite quantum state. Its non-additivity as an entanglement measure has
recently been observed. In this note, we estimate the tensor rank of multiple
copies of the tripartite state
. Both an upper
bound and a lower bound of this rank are derived. In particular, it is proven
that the tensor rank of is seven, thus resolving a
previously open problem. Some implications of this result are discussed in
terms of transformation rates between and multiple copies
of the state .Comment: Comments: 3 pages (Revtex 4). Minor corrections to Theorem 1.
Presentation refined. Main results unchanged. Comments are welcom
Application of RNA silencing to plant disease resistance
To reduce the losses caused by plant pathogens, plant biologists have adopted numerous methods to engineer resistant plants. Among them, RNA silencing-based resistance has been a powerful tool that has been used to engineer resistant crops during the last two decades. Based on this mechanism, diverse approaches were developed. In this review, we focus on the application of RNA silencing to produce plants that are resistant to plant viruses such as RNA and DNA viruses, viroids, insects, and the recent expansion to fungal pathogens
Triple-product asymmetry in the radiative two-pion tau decay
In this work, we perform a detailed study of the
decay process within the resonance chiral
theory. We pay special attention to the triple-product asymmetry in the
process. The minimal resonance chiral Lagrangian
and the odd-intrinsic parity resonance operators are simultaneously included to
calculate the decay amplitudes. Various invariant-mass distributions in the
, and systems are studied and they
reveal different resonance dynamics. We further predict the intriguing nonzero
triple-product asymmetry distributions, which may provide useful guidelines for
future experimental measurements conducted at the Belle-II and super tau-charm
facilities.Comment: 32 pages, 9 figures. To match the published versio
Revisit of tensor-meson nonet in resonance chiral theory
We study the properties of the lowest multiplet of light-flavor tensor meson
resonances, i.e. , , , and ,
within the resonance chiral theory approach. The higher-order resonance chiral
operators, including the light-quark mass and corrections, are
simultaneously incorporated in our study. The use of resonance chiral
expressions allows us to analyze not only the relevant experimental data but
also in the meantime the lattice results at unphysical quark masses, including
the masses of the lowest multiplet of tensor resonances and their decay widths
into two pseudoscalar mesons. In addition, the radiative decays of the tensor
resonances into one photon plus one pseudoscalar meson and two photons are also
studied.Comment: 18 pages, 3 tables, 3 figures. To match the published versio
2-CycloΒhexyl-4-[(3,5-dimethylΒpiperidin-1-yl)methΒyl]-5-methylΒphenol
The title compound, C21H33NO, crystallizes with three independent molΒecules in the asymmetric unit. The cycloΒhexane and piperidine rings adopt chair conformations. The crystal packing is stabilized by interΒmolecular OβHβ―N and CβHβ―O hydrogen bonds, and by weak ΟβΟ stacking interΒactions [centroidβcentroid distance = 3.876β
(2)β
Γ
]
Sedentary Behavior Is Independently Related to Fat Mass among Children and Adolescents in South China
We aim to explore the independent associations of sedentary behaviors (SB)
with body mass distribution among Chinese children. Data on the screen-based
sedentary time (television viewing and computer use) and doing homework,
physical activities and dietary intake of 1586 Chinese children (50.3% girls)
aged 7β15 years were obtained through validated questionnaires. Skin-fold
thickness, body height, and weight were measured to calculate percent body fat
(%BF), fat mass index (FMI), and fat-free mass index (FFMI). Parental
characteristics were collected by questionnaires. Among girls, time of SB
(screen time or doing homework) was positively related to %BF, FMI, and FFMI
(p < 0.03) after adjusting for maternal overweight, the average annual income
of family, moderate-to-vigorous physical activity energy expenditure, and
energy intake: Girls in the highest tertile of screen time/homework had
16.7%/23.3% higher relative FMI and 2.9%/2.9% higher relative FFMI than girls
in the lowest tertile. Among boys, screen time was positively associated with
FFMI (p 0.09), while time of
doing homework was positively related to %BF and FMI (p = 0.03). Sedentary
behaviors might be positively and independently related to fat mass among
Chinese children, and were more pronounced in girls
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