4,370 research outputs found
Modifying -qubit controlled- gate to be -qubit Toffoli gate
The decomposition for controlled- gate in [Phys. Rev. A, 87, 062318
(2013)] has a shallow circuit depth with no ancilla. Here we modify
this decomposition to decompose -qubit Toffoli gate with only
additional single-qubit gates. The circuit depth is unchanged and no ancilla is
needed. We explicitly show that the circuit after decomposition can be easily
constructed in present physical systems.Comment: 6 pages, 9 figure
Many Local Pattern Texture Features: Which Is Better for Image-Based Multilabel Human Protein Subcellular Localization Classification?
Human protein subcellular location prediction can provide critical knowledge for understanding a protein’s function. Since significant progress has been made on digital microscopy, automated image-based protein subcellular location classification is urgently needed. In this paper, we aim to investigate more representative image features that can be effectively used for dealing with the multilabel subcellular image samples. We prepared a large multilabel immunohistochemistry (IHC) image benchmark from the Human Protein Atlas database and tested the performance of different local texture features, including completed local binary pattern, local tetra pattern, and the standard local binary pattern feature. According to our experimental results from binary relevance multilabel machine learning models, the completed local binary pattern, and local tetra pattern are more discriminative for describing IHC images when compared to the traditional local binary pattern descriptor. The combination of these two novel local pattern features and the conventional global texture features is also studied. The enhanced performance of final binary relevance classification model trained on the combined feature space demonstrates that different features are complementary to each other and thus capable of improving the accuracy of classification
Ultrafast pump-probe spectroscopic signatures of superconducting and pseudogap phases in YBa2Cu3O7-{\delta} films
Femtosecond pump-probe spectroscopy is applied to identify transient optical
signatures of phase transitions in optimally doped YBa2Cu3O7-{\delta} films. To
elucidate the dynamics of superconducting and pseudogap phases, the slow
thermal component is removed from the time-domain traces of photo-induced
reflectivity in a high-flux regime with low frequency pulse rate. The rescaled
data exhibit distinct signatures of the phase separation with abrupt changes at
the onsets of TSC and TPG in excellent agreement with transport data. Compared
to the superconducting phase, the response of the pseudogap phase is
characterized by the strongly reduced reflectivity change accompanied by a
faster recovery time.Comment: 14 pages, 3 figure
A Monte Carlo Bayesian Search for the Plausible Source of the Telescope Array Hotspot
The Telescope Array (TA) collaboration has reported a hotspot of 19
ultrahigh-energy cosmic rays (UHECRs). Using a universal model with one source
and energy-dependent magnetic deflections, we show that the distribution of the
TA hotspot events is consistent with a single source hypothesis, although
multiple sources cannot be ruled out. The chance probability of this
distribution arising from a homogeneous distribution is . We describe a
Monte Carlo Bayesian (MCB) inference approach, which can be used to derive
parameters of the magnetic fields as well as the source coordinates, and we
apply this method to the TA hotspot data, inferring the location of the likely
source. We discuss possible applications of the same approach to future data.Comment: 7 pages, 5 figures, accepted by Physical Review
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