# K. Chen - UCSC, UMinn

## Contact Details

NameK. Chen |
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AffiliationUCSC, UMinn |
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Location |
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## Pubs By Year |
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## Pub CategoriesPhysics - Strongly Correlated Electrons (5) Quantum Physics (4) Mathematics - Number Theory (4) Computer Science - Computer Vision and Pattern Recognition (4) Computer Science - Learning (4) Statistics - Machine Learning (4) Mathematics - Information Theory (3) Physics - Materials Science (3) Physics - Optics (3) Statistics - Methodology (3) High Energy Physics - Experiment (3) High Energy Physics - Phenomenology (3) Computer Science - Information Theory (3) Computer Science - Computation and Language (2) Mathematics - Algebraic Geometry (2) Computer Science - Neural and Evolutionary Computing (2) Mathematics - Combinatorics (1) Physics - Biological Physics (1) Physics - Statistical Mechanics (1) Mathematics - Operator Algebras (1) Physics - Computational Physics (1) Physics - Soft Condensed Matter (1) Physics - Instrumentation and Detectors (1) Mathematics - Probability (1) Nonlinear Sciences - Exactly Solvable and Integrable Systems (1) Mathematics - Numerical Analysis (1) Computer Science - Cryptography and Security (1) Computer Science - Human-Computer Interaction (1) Computer Science - Networking and Internet Architecture (1) Physics - Mesoscopic Systems and Quantum Hall Effect (1) Instrumentation and Methods for Astrophysics (1) Physics - Chemical Physics (1) |

## Publications Authored By K. Chen

In this paper, we propose a Polar coding scheme for parallel Gaussian channels. The encoder knows the sum rate of the parallel channels but does not know the rate of any channel. By using the nesting property of Polar code, we design a coding/decoding scheme to achieve the sum rates. Read More

The cerium based intermetallics that crystallize in the ThCr$_2$Si$_2$-type structure exhibit a multitude of exotic electronic states including magnetism, spin/charge instabilities, quantum criticality, and superconductivity. Although competition between the Kondo and RKKY energy scales captures some aspects of these phenomena, this does not immediately reveal the systematic trends in chemical composition series. Here we show that the nearly independent parameters of unit cell volume and $d$-shell filling of the transition metal element capture the major trends in the behavior throughout this entire family of compounds, where the locus of the exotic electronic states coincides with a crossover region between trivalent and intermediate valence $f$-electron states. Read More

Exploiting the energy of randomly moving active agents such as bacteria is a fascinating way to power a microdevice. Here we show, by simulations, that a chain-grafted disk-like colloid can rotate unidirectionally when immersed in a thin film of active particle suspension. The spontaneous symmetry breaking of chain configurations is the origin of the unidirectional rotation. Read More

**Authors:**S. Agrestini, C. -Y. Kuo, D. Mikhailova, K. Chen, P. Ohresser, T. W. Pi, H. Guo, A. C. Komarek, A. Tanaka, Z. Hu, L. H. Tjeng

**Category:**Physics - Strongly Correlated Electrons

We report on a combined soft x-ray absorption and magnetic circular dichroism (XMCD) study at the Co-$L_{3,2}$ on the hybrid 3$d$/5$d$ solid state oxide Sr$_2$Co$_{0.5}$Ir$_{0.5}$O$_4$ with the K$_2$NiF$_4$ structure. Read More

The use of unmanned aerial vehicles (UAVs) that serve as aerial base stations is expected to become predominant in the next decade. However, in order for this technology to unfold its full potential it is necessary to develop a fundamental understanding of the distinctive features of air-to-ground (A2G) links. As a contribution in this direction, this paper proposes a generic framework for the analysis and optimization of the A2G systems. Read More

In this paper, a novel method of quantum image rotation (QIR) based on shear transformations on NEQR quantum images is proposed. To compute the horizontal and vertical shear mappings required for rotation, we have designed quantum self-adder, quantum control multiplier, and quantum interpolation circuits as the basic computing units in the QIR implementation. Furthermore, we provide several examples of our results by presenting computer simulation experiments of QIR under $30^\circ$, $45^\circ$, and $60^\circ$ rotation scenarios and have a discussion onto the anti-aliasing and computational complexity of the proposed QIR method. Read More

Many modern big data applications feature large scale in both numbers of responses and predictors. Better statistical efficiency and scientific insights can be enabled by understanding the large-scale response-predictor association network structures via layers of sparse latent factors ranked by importance. Yet sparsity and orthogonality have been two largely incompatible goals. Read More

In this letter we propose an approach to obtain solutions for the nonlocal nonlinear Schr\"{o}dinger hierarchy from the known ones of the Ablowitz-Kaup-Newell-Segur hierarchy by reduction. These solutions are presented in terms of double Wronskian and some of them are new.The approach is general and can be used for other systems with double Wronskian solutions which admit local and nonlocal reductions. Read More

For a pair of positive integers $n,k$ with $n\geq 2$, in this paper we prove that $$ \sum_{r=1}^k\sum_{|\bf\alpha|=k}{k\choose\bf\alpha} \zeta(n\bf\alpha)=\zeta(n)^k =\sum^k_{r=1}\sum_{|\bf\alpha|=k} {k\choose\bf\alpha}(-1)^{k-r}\zeta^\star(n\bf\alpha), $$ where $\bf\alpha=(\alpha_1,\alpha_2,\ldots,\alpha_r)$ is a $r$-tuple of positive integers. Moreover, we give an application to combinatorics and get the following identity: $$ \sum^{2k}_{r=1}r!{2k\brace r}=\sum^k_{p=1}\sum^k_{q=1}{k\brace p}{k\brace q} p!q!D(p,q), $$ where ${k\brace p}$ is the Stirling numbers of the second kind and $D(p,q)$ is the Delannoy number. Read More

This paper addresses maximum likelihood (ML) estimation based model fitting in the context of extrasolar planet detection. This problem is featured by the following properties: 1) the candidate models under consideration are highly nonlinear; 2) the likelihood surface has a huge number of peaks; 3) the parameter space ranges in size from a few to dozens of dimensions. These properties make the ML search a very challenging problem, as it lacks any analytical or gradient based searching solution to explore the parameter space. Read More

We present a detailed study of the low temperature and high magnetic field phases in the chemical substitution series URu$_2$Si$_{2-x}$P$_x$ using electrical transport and magnetization in pulsed magnetic fields up to 65T. Within the hidden order region (0 \textless $\ x$ \textless $\ $ 0.035) the high field ordering is robust even as the hidden order temperature is suppressed. Read More

Measurement-device-independent quantum key distribution (MDI-QKD) protocol was proposed to remove all the detector side channel attacks, while its security relies on the trusted encoding systems. Here we propose a one-sided MDI-QKD (1SMDI-QKD) protocol, which enjoys detection loophole-free advantage, and at the same time weakens the state preparation assumption in MDI-QKD. The 1SMDI-QKD can be regarded as a modified MDI-QKD, in which Bob's encoding system is trusted, while Alice's is uncharacterized. Read More

This paper presents a Convolutional Neural Network (CNN) based page segmentation method for handwritten historical document images. We consider page segmentation as a pixel labeling problem, i.e. Read More

Singlet exciton fission (SF), the conversion of one spin-singlet exciton (S1) into two spin-triplet excitons (T1), could provide a means to overcome the Shockley-Queisser limit in photovoltaics. SF as measured by the decay of S1 has been shown to occur efficiently and independently of temperature even when the energy of S1 is as much as 200 meV less than 2T1. Here, we study films of TIPS-tetracene using transient optical spectroscopy and show that the initial rise of the triplet pair state (TT) occurs in 300 fs, matched by rapid loss of S1 stimulated emission, and that this process is mediated by the strong coupling of electronic and vibrational degrees of freedom. Read More

Given a user's query, traditional image search systems rank images according to its relevance to a single modality (e.g., image content or surrounding text). Read More

**Category:**Mathematics - Algebraic Geometry

In this paper we study the Ekedahl-Serre conjecture over number fields. The main result is the existence of an upper bound for the genus of curves whose Jacobians admit isogenies of bounded degrees to self-products of a given elliptic curve over a number field satisfying the Sato-Tate equidistribution, and the technique is motivated by similar results over function field due to Kukulies. A few variants are considered and questions involving more general Shimura subvarieties are discussed. Read More

This paper concerns multi-way functional data where double or multiple indices are involved. To alleviate the difficulties associated with modeling of the multi-way covariance structure, a commonly used assumption is the separable covariance assumption $C(s,t;u,v) = a C_{1}(s,u) C_{2}(t,v)$, which we call strong separability in contrast to the weak separability that will be introduced in this paper. With the proposed weak separability structure, the covariance can be approximated by a weighted sum of spatial-temporal separable components, including strong separability as a special case. Read More

Inspired by the boom of the consumer IoT market, many device manufacturers, start-up companies and technology giants have jumped into the space. Unfortunately, the exciting utility and rapid marketization of IoT, come at the expense of privacy and security. Industry reports and academic work have revealed many attacks on IoT systems, resulting in privacy leakage, property loss and large-scale availability problems. Read More

We report infrared magneto-spectroscopy studies on thin crystals of an emerging Dirac material ZrTe5 near the intrinsic limit. The observed structure of the Landau level transitions and zero-field infrared absorption indicate a two-dimensional Dirac-like electronic structure, similar to that in graphene but with a small relativistic mass corresponding to a 9.4 meV energy gap. Read More

Motivated by the advantages achieved by implicit analogue net for solving online linear equations, a novel implicit neural model is designed based on conventional explicit gradient neural networks in this letter by introducing a positive-definite mass matrix. In addition to taking the advantages of the implicit neural dynamics, the proposed implicit gradient neural networks can still achieve globally exponential convergence to the unique theoretical solution of linear equations and also global stability even under no-solution and multi-solution situations. Simulative results verify theoretical convergence analysis on the proposed neural dynamics. Read More

Temporal Action Proposal (TAP) generation is an important problem, as fast and accurate extraction of semantically important (e.g. human actions) segments from untrimmed videos is an important step for large-scale video analysis. Read More

Successful fine-grained image classification methods learn subtle details between visually similar (sub-)classes, but the problem becomes significantly more challenging if the details are missing due to low resolution. Encouraged by the recent success of Convolutional Neural Network (CNN) architectures in image classification, we propose a novel resolution-aware deep model which combines convolutional image super-resolution and convolutional fine-grained classification into a single model in an end-to-end manner. Extensive experiments on the Stanford Cars and Caltech-UCSD Birds 200-2011 benchmarks demonstrate that the proposed model consistently performs better than conventional convolutional net on classifying fine-grained object classes in low-resolution images. Read More

The temperature ($T$) - magnetic field ($H$) phase diagram for the tetragonal layered compound CeSbSe, is determined from magnetization, specific heat, and electrical resistivity measurements. This system exhibits complex magnetic ordering at $T_{\rm{M}}$ $=$ 3 K and the application of a magnetic field results in a cascade of magnetically ordered states for $H$ $\lesssim$ 1.8 T which are characterized by fractional integer size steps: i. Read More

Characterizing the dynamics of open systems usually starts with a perturbative theory and involves various approximations, such as the Born, Markov and rotating-wave approximation (RWA). However, the approximation approaches could introduce more or less incompleteness in describing the bath behaviors. Here, we consider a quantum channel, which is modeled by a qubit (a two-level system) interacting with a bosonic bath. Read More

Let $m$, $r$ and $n$ be positive integers. We denote by ${\bf k}\vdash n$ any tuple of odd positive integers ${\bf k}=(k_1,\dots,k_t)$ such that $k_1+\dots+k_t=n$ and $k_j\ge 3$ for all $j$. In this paper we prove that for every sufficiently large prime $p$ $$ \sum_{\substack{l_1+l_2+\cdots+l_n=mp^r p\nmid l_1 l_2 \cdots l_n }} \frac1{l_1l_2\cdots l_n} \equiv p^{r-1} \sum_{{\bf k}\vdash n} C_{m,{\bf k}} B_{p-{\bf k}} \pmod{p^r} $$ where $B_{p-{\bf k}}=B_{p-k_1}B_{p-k_2}\cdots B_{p-k_t}$ are products of Bernoulli numbers and the coefficients $C_{m,{\bf k}}$ are polynomials of $m$ independent of $p$ and $r$. Read More

We consider the inverse problem of reconstructing the optical parameters for stationary radiative transfer equation (RTE) from velocity-averaged measurement. The RTE often contains multiple scales characterized by the magnitude of a dimensionless parameter---the Knudsen number ($K_n$). In the diffusive scaling ($K_n \ll 1$), the stationary RTE is well approximated by an elliptic equation in the forward setting. Read More

Let $p$ be a prime. In this short note we study some families of super congruences involving the following alternating sums \begin{equation*} \sum_{\substack{j_1+j_2+\cdots+j_n=2 p^r p\nmid j_1 j_2 \cdots j_n }} \frac{(-1)^{j_1+\cdots+j_b}}{j_1\cdots j_n} \pmod{p^r}, \end{equation*} which extend similar statements proved by Shen and Cai who treated the cases when $n=4,5$. Read More

Retaining players over an extended period of time is a long-standing challenge in game industry. Significant effort has been paid to understanding what motivates players enjoy games. While individuals may have varying reasons to play or abandon a game at different stages within the game, previous studies have looked at the retention problem from a snapshot view. Read More

Compared to current mobile networks, next-generation mobile networks are expected to support higher numbers of simultaneously connected devices and to achieve higher system spectrum efficiency and lower power consumption. To achieve these goals, we study the multi-sharing device-to-device (D2D) communication, which allows any cellular user equipment to share its radio resource with multiple D2D devices. We jointly consider resource block reuse and power control and then develop the MISS algorithm. Read More

Bulk sensitive hard x-ray photoelectron spectroscopy data of the Ce 3$p$ core level of CeRu$_4$Sn$_6$ are presented. Using a combination of full multiplet and configuration iteration model we were able to obtain an accurate lineshape analysis of the data, thereby taking into account correlations for the strong plasmon intensities. We conclude that CeRu$_4$Sn$_6$ is a moderately mixed valence compound with a weight of 8% for the Ce $f^0$ configuration in the ground state. Read More

The geometrically frustrated two dimensional triangular lattice magnets A${_4}$B'B${_2}$O$_{12}$ (A = Ba, Sr, La; B' = Co, Ni, Mn; B = W, Re) have been studied by x-ray diffraction, AC and DC susceptibilities, powder neutron diffraction, and specific heat measurements. The results reveal that (i) the samples containing Co$^{2+}$ (effective spin-1/2) and Ni$^{2+}$ (spin-1) ions with small spin numbers exhibit ferromagnetic (FM) ordering while the sample containing Mn$^{2+}$ (spin-5/2) ions with a large spin number exhibits antiferromagnetic (AFM) ordering. We ascribe these spin number manipulated ground states to the competition between the AFM B'-O-O-B' and FM B'-O-B-O-B' superexchange interactions; (ii) the chemical pressure introduced into the Co containing samples through the replacement of different size ions on the A site finely tunes the FM ordering temperature of the system. Read More

Coherent Raman microscopy provide label-free imaging by interrogating the intrinsic vibration of biomolecules. Nevertheless, trade-off between high chemical-specificity and high imaging-speed currently exists in transition from spectroscopy to spectroscopic imaging when capturing dynamics in complex living systems. Here, we present a novel concept in dual-comb scheme to substantially beat this trade-off and facilitate high-resolution broadband coherent anti-Stokes Raman spectroscopic imaging based on down-converted, automatically varying delay-time in spectral focusing excitation. Read More

Ultrafast electron pulses, combined with laser-pump and electron-probe technologies, allow for various forms of ultrafast microscopy and spectroscopy to elucidate otherwise challenging to observe physical and chemical transitions. However, the pursuit of simultaneous ultimate spatial and temporal resolution has been largely subdued by the low monochromaticity of the electron pulses and their poor phase synchronization to the optical excitation pulses. State-of-the-art photon-driven sources have good monochromaticity but poor phase synchronization. Read More

Metasurfaces enable a new paradigm of controlling electromagnetic waves by manipulating subwavelength artificial structures within just a fraction of wavelength. Despite the rapid growth, simultaneously achieving low-dimensionality, high transmission efficiency, real-time continuous reconfigurability, and a wide variety of re-programmable functions are still very challenging, forcing researchers to realize just one or few of the aforementioned features in one design. In this study, we report a subwavelength reconfigurable Huygens' metasurface realized by loading it with controllable active elements. Read More

**Authors:**The Belle Collaboration, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, K. Arinstein, Y. Arita, D. M. Asner, T. Aso, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, A. Bala, Y. Ban, V. Bansal, E. Barberio, M. Barrett, W. Bartel, A. Bay, P. Behera, M. Belhorn, K. Belous, M. Berger, F. U. Bernlochner, D. Besson, V. Bhardwaj, B. Bhuyan, J. Biswal, T. Bloomfield, S. Blyth, A. Bobrov, A. Bondar, G. Bonvicini, C. Bookwalter, C. Boulahouache, A. Bozek, M. Bračko, N. Braun, F. Breibeck, J. Brodzicka, T. E. Browder, E. Waheed, D. Červenkov, M. -C. Chang, P. Chang, Y. Chao, V. Chekelian, A. Chen, K. -F. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Crnkovic, J. Dalseno, M. Danilov, N. Dash, S. Di Carlo, J. Dingfelder, Z. Doležal, D. Dossett, Z. Drásal, A. Drutskoy, S. Dubey, D. Dutta, K. Dutta, S. Eidelman, D. Epifanov, S. Falke, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, O. Frost, B. G. Fulsom, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, M. Gelb, J. Gemmler, D. Getzkow, R. Gillard, F. Giordano, R. Glattauer, Y. M. Goh, P. Goldenzweig, B. Golob, D. Greenwald, M. Grosse Perdekamp, J. Grygier, O. Grzymkowska, Y. Guan, E. Guido, H. Guo, J. Haba, P. Hamer, Y. L. Han, K. Hara, T. Hara, Y. Hasegawa, J. Hasenbusch, K. Hayasaka, H. Hayashii, X. H. He, M. Heck, M. T. Hedges, D. Heffernan, M. Heider, A. Heller, T. Higuchi, S. Himori, S. Hirose, T. Horiguchi, Y. Hoshi, K. Hoshina, W. -S. Hou, Y. B. Hsiung, C. -L. Hsu, M. Huschle, H. J. Hyun, Y. Igarashi, T. Iijima, M. Imamura, K. Inami, G. Inguglia, A. Ishikawa, K. Itagaki, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, S. Iwata, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, M. Jones, K. K. Joo, T. Julius, J. Kahn, H. Kakuno, A. B. Kaliyar, J. H. Kang, K. H. Kang, P. Kapusta, G. Karyan, S. U. Kataoka, E. Kato, Y. Kato, P. Katrenko, H. Kawai, T. Kawasaki, T. Keck, H. Kichimi, C. Kiesling, B. H. Kim, D. Y. Kim, H. J. Kim, H. -J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, C. Kleinwort, J. Klucar, B. R. Ko, N. Kobayashi, S. Koblitz, P. Kodyš, Y. Koga, S. Korpar, D. Kotchetkov, R. T. Kouzes, P. Križan, P. Krokovny, B. Kronenbitter, T. Kuhr, R. Kulasiri, R. Kumar, T. Kumita, E. Kurihara, Y. Kuroki, A. Kuzmin, P. Kvasnička, Y. -J. Kwon, Y. -T. Lai, J. S. Lange, D. H. Lee, I. S. Lee, S. -H. Lee, M. Leitgab, R. Leitner, D. Levit, P. Lewis, C. H. Li, H. Li, J. Li, L. Li, X. Li, Y. Li, L. Li Gioi, J. Libby, A. Limosani, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, A. Loos, R. Louvot, M. Lubej, P. Lukin, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, D. Matvienko, A. Matyja, F. Metzner, S. McOnie, Y. Mikami, K. Miyabayashi, Y. Miyachi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, S. Mohanty, D. Mohapatra, A. Moll, H. K. Moon, T. Mori, T. Morii, H. -G. Moser, M. Mrvar, T. Müller, N. Muramatsu, R. Mussa, T. Nagamine, Y. Nagasaka, Y. Nakahama, I. Nakamura, K. R. Nakamura, E. Nakano, H. Nakano, T. Nakano, M. Nakao, H. Nakayama, H. Nakazawa, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, E. Nedelkovska, K. Negishi, K. Neichi, C. Ng, C. Niebuhr, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, A. Ogawa, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ono, Y. Ono, Y. Onuki, W. Ostrowicz, C. Oswald, H. Ozaki, P. Pakhlov, G. Pakhlova, B. Pal, H. Palka, E. Panzenböck, C. -S. Park, C. W. Park, H. Park, K. S. Park, S. Paul, L. S. Peak, T. K. Pedlar, T. Peng, L. Pesántez, R. Pestotnik, M. Peters, M. Petrič, L. E. Piilonen, A. Poluektov, K. Prasanth, M. Prim, K. Prothmann, C. Pulvermacher, M. V. Purohit, J. Rauch, B. Reisert, E. Ribežl, M. Ritter, J. Rorie, A. Rostomyan, M. Rozanska, S. Rummel, S. Ryu, H. Sahoo, M. Salehi, T. Saito, K. Sakai, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, J. Sasaki, N. Sasao, Y. Sato, V. Savinov, T. Schlüter, O. Schneider, G. Schnell, P. Schönmeier, M. Schram, C. Schwanda, A. J. Schwartz, B. Schwenker, R. Seidl, Y. Seino, D. Semmler, K. Senyo, O. Seon, I. S. Seong, M. E. Sevior, L. Shang, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, H. Shibuya, N. Shimizu, S. Shinomiya, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, J. B. Singh, R. Sinha, P. Smerkol, Y. -S. Sohn, A. Sokolov, Y. Soloviev, E. Solovieva, S. Stanič, M. Starič, M. Steder, J. F. Strube, J. Stypula, S. Sugihara, A. Sugiyama, M. Sumihama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, K. Suzuki, S. Suzuki, S. Y. Suzuki, Z. Suzuki, H. Takeichi, M. Takizawa, U. Tamponi, M. Tanaka, S. Tanaka, K. Tanida, N. Taniguchi, G. N. Taylor, F. Tenchini, Y. Teramoto, I. Tikhomirov, K. Trabelsi, V. Trusov, T. Tsuboyama, M. Uchida, T. Uchida, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, S. Uozumi, P. Urquijo, Y. Ushiroda, Y. Usov, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, K. Vervink, A. Vinokurova, V. Vorobyev, A. Vossen, M. N. Wagner, E. Waheed, B. Wang, C. H. Wang, J. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, R. Wedd, S. Wehle, E. White, E. Widmann, J. Wiechczynski, K. M. Williams, E. Won, B. D. Yabsley, S. Yamada, H. Yamamoto, J. Yamaoka, Y. Yamashita, M. Yamauchi, S. Yashchenko, H. Ye, J. Yelton, Y. Yook, C. Z. Yuan, Y. Yusa, C. C. Zhang, L. M. Zhang, Z. P. Zhang, L. Zhao, V. Zhilich, V. Zhukova, V. Zhulanov, M. Ziegler, T. Zivko, A. Zupanc, N. Zwahlen

**Category:**High Energy Physics - Experiment

The precise determination of the CKM matrix element $\left| V_{cb}\right|$ is important for carrying out tests of the flavour sector of the Standard Model. In this article we present a preliminary analysis of the $\bar B^0 \to D^{*\,+} \, \ell^- \, \bar \nu_\ell$ decay mode and its charge conjugate, selected in events that contain a fully reconstructed $B$-meson, using 772 million $e^+ \, e^- \to \Upsilon(4S) \to B \bar B$ events recorded by the Belle detector at KEKB. Unfolded differential decay rates of four kinematic variables fully describing the $\bar B^0 \to D^{*\,+} \, \ell^- \, \bar \nu_\ell$ decay in the $B$-meson rest frame are presented. Read More

Hypergraph states, a generalization of graph states, constitute a large class of quantum states with intriguing non-local properties and have promising applications in quantum information science and technology. In this paper, we generalize hypergraph states to qudit hypergraph states, i.e. Read More

We characterize some equivalent statements of aperiodicity of an element on locally compact group, and give an intuition for "How strong does the aperiodicity of an element affect the existence of hypercyclic weighted translation operators?". In fact, there exists a mixing, chaotic and frequently hypercyclic weighted translation $T_{a,w}$ when $a$ is an aperiodic element. In other words, this explains how hard it is to argue the existence of hypercyclic weighted translation operators when we take off the aperiodicity of the element $a$. Read More

In the framework of the color-magnetic interaction, we have systematically studied the mass splittings of the possible hidden-charm pentaquarks $qqqc\bar{c}$ ($q=u,d,s$) where the three light quarks are in a color-octet state. We find that i) the LHCb $P_c$ states fall in the mass region of the studied system; ii) most pentaquarks should be broad states since their $S$-wave open-charm decays are allowed while the lowest state is the $J^P=\frac12^-$ $\Lambda$-like pentaquark with probably the suppressed $\eta_c\Lambda$ decay mode only; and iii) the $J^P=\frac52^-$ states do not decay through $S$-wave and their widths are not so broad. The masses and widths of the two LHCb $P_c$ baryons are compatible with such pentaquark states. Read More

Solid-state nanopores are promising tools for single molecule detection of both DNA and proteins. In this study, we investigate the patterns of ionic current blockades as DNA translocates into or out of the geometric confinement of such conically shaped pores. We studied how the geometry of a nanopore affects the detected ionic current signal of a translocating DNA molecule over a wide range of salt concentration. Read More

We present the systematical decomposition results of three-dimensional (3D) fragmentation functions (FFs) from parton correlators for spin-1 hadron. We choose one of the best process $e^+e^-\to V\pi X$ to study the 3D and tensor polarization dependent FFs. By making a general kinematic analysis we show that the cross section is expressed by 81 independent structure functions, and get the results of the azimuthal and spin asymmetries. Read More

Large set of orthogonal arrays (LOA) were introduced by D. R. Stinson, and it is also used to construct multimagic squares recently. Read More

A logarithmic oscillator has been proposed recently to serve as a thermostat recently since it has a peculiar property of infinite heat capacity according to the virial theorem. In order to examine its feasibility by numerical simulations, a modified logarithmic potential has been applied in previous studies to eliminate the singularity at origin. The role played by the modification has been elucidated in the present study. Read More

**Authors:**MicroBooNE Collaboration, R. Acciarri, C. Adams, R. An, A. Aparicio, S. Aponte, J. Asaadi, M. Auger, N. Ayoub, L. Bagby, B. Baller, R. Barger, G. Barr, M. Bass, F. Bay, K. Biery, M. Bishai, A. Blake, V. Bocean, D. Boehnlein, V. D. Bogert, T. Bolton, L. Bugel, C. Callahan, L. Camilleri, D. Caratelli, B. Carls, R. Castillo Fernandez, F. Cavanna, S. Chappa, H. Chen, K. Chen, C. Y. Chi, C. S. Chiu, E. Church, D. Cianci, G. H. Collin, J. M. Conrad, M. Convery, J. Cornele, P. Cowan, J. I. Crespo-Anadon, G. Crutcher, C. Darve, R. Davis, M. Del Tutto, D. Devitt, S. Duffin, S. Dytman, B. Eberly, A. Ereditato, D. Erickson, L. Escudero Sanchez, J. Esquivel, S. Farooq, J. Farrell, D. Featherston, B. T. Fleming, W. Foreman, A. P. Furmanski, V. Genty, M. Geynisman, D. Goeldi, B. Goff, S. Gollapinni, N. Graf, E. Gramellini, J. Green, A. Greene, H. Greenlee, T. Griffin, R. Grosso, R. Guenette, A. Hackenburg, R. Haenni, P. Hamilton, P. Healey, O. Hen, E. Henderson, J. Hewes, C. Hill, K. Hill, L. Himes, J. Ho, G. Horton-Smith, D. Huffman, C. M. Ignarra, C. James, E. James, J. Jan de Vries, W. Jaskierny, C. M. Jen, L. Jiang, B. Johnson, M. Johnson, R. A. Johnson, B. J. P. Jones, J. Joshi, H. Jostlein, D. Kaleko, L. N. Kalousis, G. Karagiorgi, T. Katori, P. Kellogg, W. Ketchum, J. Kilmer, B. King, B. Kirby, M. Kirby, E. Klein, T. Kobilarcik, I. Kreslo, R. Krull, R. Kubinski, G. Lange, F. Lanni, A. Lathrop, A. Laube, W. M. Lee, Y. Li, D. Lissauer, A. Lister, B. R. Littlejohn, S. Lockwitz, D. Lorca, W. C. Louis, G. Lukhanin, M. Luethi, B. Lundberg, X. Luo, G. Mahler, I. Majoros, D. Makowiecki, A. Marchionni, C. Mariani, D. Markley, J. Marshall, D. A. Martinez Caicedo, K. T. McDonald, D. McKee, A. McLean, J. Mead, V. Meddage, T. Miceli, G. B. Mills, W. Miner, J. Moon, M. Mooney, C. D. Moore, Z. Moss, J. Mousseau, R. Murrells, D. Naples, P. Nienaber, B. Norris, N. Norton, J. Nowak, M. OBoyle, T. Olszanowski, O. Palamara, V. Paolone, V. Papavassiliou, S. F. Pate, Z. Pavlovic, R. Pelkey, M. Phipps, S. Pordes, D. Porzio, G. Pulliam, X. Qian, J. L. Raaf, V. Radeka, A. Rafique, R. A Rameika, B. Rebel, R. Rechenmacher, S. Rescia, L. Rochester, C. Rudolf von Rohr, A. Ruga, B. Russell, R. Sanders, W. R. Sands III, M. Sarychev, D. W. Schmitz, A. Schukraft, R. Scott, W. Seligman, M. H. Shaevitz, M. Shoun, J. Sinclair, W. Sippach, T. Smidt, A. Smith, E. L. Snider, M. Soderberg, M. Solano-Gonzalez, S. Soldner-Rembold, S. R. Soleti, J. Sondericker, P. Spentzouris, J. Spitz, J. St. John, T. Strauss, K. Sutton, A. M. Szelc, K. Taheri, N. Tagg, K. Tatum, J. Teng, K. Terao, M. Thomson, C. Thorn, J. Tillman, M. Toups, Y. T. Tsai, S. Tufanli, T. Usher, M. Utes, R. G. Van de Water, C. Vendetta, S. Vergani, E. Voirin, J. Voirin, B. Viren, P. Watkins, M. Weber, T. Wester, J. Weston, D. A. Wickremasinghe, S. Wolbers, T. Wongjirad, K. Woodruff, K. C. Wu, T. Yang, B. Yu, G. P. Zeller, J. Zennamo, C. Zhang, M. Zuckerbrot

This paper describes the design and construction of the MicroBooNE liquid argon time projection chamber and associated systems. MicroBooNE is the first phase of the Short Baseline Neutrino program, located at Fermilab, and will utilize the capabilities of liquid argon detectors to examine a rich assortment of physics topics. In this document details of design specifications, assembly procedures, and acceptance tests are reported. Read More

Polar codes are the first class of constructive channel codes achieving the symmetric capacity of the binary-input discrete memoryless channels. But the corresponding code length is limited to the power of two. In this paper, we establish a systematic framework to design the rate-compatible punctured polar (RCPP) codes with arbitrary code length. Read More

ReLU neural networks define piecewise linear functions of their inputs. However, initializing and training a neural network is very different from fitting a linear spline. In this paper, we expand empirically upon previous theoretical work to demonstrate features of trained neural networks. Read More

Neural networks with rectified linear unit activations are essentially multivariate linear splines. As such, one of many ways to measure the "complexity" or "expressivity" of a neural network is to count the number of knots in the spline model. We study the number of knots in fully-connected feedforward neural networks with rectified linear unit activation functions. Read More

The objective of knowledge graph embedding is to encode both entities and relations of knowledge graphs into continuous low-dimensional vector spaces. Previously, most works focused on symbolic representation of knowledge graph with structure information, which can not handle new entities or entities with few facts well. In this paper, we propose a novel deep architecture to utilize both structural and textual information of entities. Read More

We present for the first time the complete twist-4 result for the semi-inclusive deeply inelastic scattering $e^- N \to e^-qX$ with polarized electron and proton beams at the tree level of pQCD. The calculations have been carried out using the formulism obtained after collinear expansion where the multiple gluon scattering are taken into account and gauge links are obtained automatically in a systematical way. The results show in particular that there are twist-4 contributions to all the eight twist-2 structure functions for $e^- N \to e^-hX$ that correspond to the eight twist-2 transverse momentum dependent parton distribution functions. Read More

In this paper we study the Coleman-Oort conjecture for superelliptic curves, i.e., curves defined by affine equations $y^n=F(x)$ with $F$ a separable polynomial. Read More

In the context of natural language processing, representation learning has emerged as a newly active research subject because of its excellent performance in many applications. Learning representations of words is a pioneering study in this school of research. However, paragraph (or sentence and document) embedding learning is more suitable/reasonable for some tasks, such as sentiment classification and document summarization. Read More