964 research outputs found
Attainable entanglement of unitary transformed thermal states in liquid-state nuclear magnetic resonance with the chemical shift
Recently, Yu, Brown, and Chuang [Phys. Rev. A {\bf 71}, 032341 (2005)]
investigated the entanglement attainable from unitary transformed thermal
states in liquid-state nuclear magnetic resonance (NMR). Their research gave an
insight into the role of the entanglement in a liquid-state NMR quantum
computer. Moreover, they attempted to reveal the role of mixed-state
entanglement in quantum computing. However, they assumed that the Zeeman energy
of each nuclear spin which corresponds to a qubit takes a common value for all;
there is no chemical shift. In this paper, we research a model with the
chemical shifts and analytically derive the physical parameter region where
unitary transformed thermal states are entangled, by the positive partial
transposition (PPT) criterion with respect to any bipartition. We examine the
effect of the chemical shifts on the boundary between the separability and the
nonseparability, and find it is negligible.Comment: 9 pages, 1 figures. There were mistakes in the previous version. The
main results don't change, but our motivation has to be reconsidere
Single-epoch supernova classification with deep convolutional neural networks
Supernovae Type-Ia (SNeIa) play a significant role in exploring the history
of the expansion of the Universe, since they are the best-known standard
candles with which we can accurately measure the distance to the objects.
Finding large samples of SNeIa and investigating their detailed characteristics
have become an important issue in cosmology and astronomy. Existing methods
relied on a photometric approach that first measures the luminance of supernova
candidates precisely and then fits the results to a parametric function of
temporal changes in luminance. However, it inevitably requires multi-epoch
observations and complex luminance measurements. In this work, we present a
novel method for classifying SNeIa simply from single-epoch observation images
without any complex measurements, by effectively integrating the
state-of-the-art computer vision methodology into the standard photometric
approach. Our method first builds a convolutional neural network for estimating
the luminance of supernovae from telescope images, and then constructs another
neural network for the classification, where the estimated luminance and
observation dates are used as features for classification. Both of the neural
networks are integrated into a single deep neural network to classify SNeIa
directly from observation images. Experimental results show the effectiveness
of the proposed method and reveal classification performance comparable to
existing photometric methods with multi-epoch observations.Comment: 7 pages, published as a workshop paper in ICDCS2017, in June 201
Numerical simulations of mid-ocean ridge hydrothermal circulation including the phase separation of seawater
Facile synthetic procedure for and electrochemical properties of hexa(2-thienyl)benzenes directed toward electroactive materials
In the presence of RhCl3 center dot 3H(2)O and i-Pr2NEt, the cyclotrimerization of di(2-thienyl)acetylenes proceeded smoothly to afford hexa(2-thienyl)benzenes. CV analysis of the hexa(2-thienyl)benzenes showed that they may be useful as electroactive materials.</p
Some consequences of the A/A-bar distinction of scrambling
It has been discussed that clause intermal scrambling (CIS) involves A or A-bar movement whereas long distance scrambling (LDS) involves A-bar movement (cf. Mahajan (1989), Webelhuth (1989), Saito (1992)). ..
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