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Your search keyword '"Kohno, Y"' showing total 1,810 results
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1,810 results on '"Kohno, Y"'

1. The ALMA Phasing System: A Beamforming Capability for Ultra-High-Resolution Science at (Sub)Millimeter Wavelengths

Author

Matthews, L. D., Crew, G. B., Doeleman, S. S., Lacasse, R., Saez, A., Alef, W., Akiyama, K., Amestica, R., Anderson, J. M., Barkats, D. A., Baudry, A., Brogiere, D., Escoffier, R., Fish, V. L., Greenberg, J., Hecht, M. H., Hiriart, R., Hirota, A., Honma, M., Ho, P. T. P., Impellizzeri, C. M. V., Inoue, M., Kohno, Y., Lopez, B., Marti-Vidal, I., Messias, H., Meyer-Zhao, Z., Mora-Klein, M., Nagar, N. M., Nishioka, H., Oyama, T., Pankratius, V., Perez, J., Phillips, N., Pradel, N., Rottmann, H., Roy, A. L., Ruszczyk, C. A., Shillue, B., Suzuki, S., and Treacy, R.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Atacama Millimeter/submillimeter Array (ALMA) Phasing Project (APP) has developed and deployed the hardware and software necessary to coherently sum the signals of individual ALMA antennas and record the aggregate sum in Very Long Baseline Interferometry (VLBI) Data Exchange Format. These beamforming capabilities allow the ALMA array to collectively function as the equivalent of a single large aperture and participate in global VLBI arrays. The inclusion of phased ALMA in current VLBI networks operating at (sub)millimeter wavelengths provides an order of magnitude improvement in sensitivity, as well as enhancements in u-v coverage and north-south angular resolution. The availability of a phased ALMA enables a wide range of new ultra-high angular resolution science applications, including the resolution of supermassive black holes on event horizon scales and studies of the launch and collimation of astrophysical jets. It also provides a high-sensitivity aperture that may be used for investigations such as pulsar searches at high frequencies. This paper provides an overview of the ALMA Phasing System design, implementation, and performance characteristics., Comment: Accepted to PASP; 23 pages

Published
2017
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2. The ALMA Phasing System : A Beamforming Capability for Ultra-high-resolution Science at (Sub)Millimeter Wavelengths

Author

Matthews, L. D., Crew, G. B., Doeleman, S. S., Lacasse, R., Saez, A. F., Alef, W., Akiyama, K., Amestica, R., Anderson, J. M., Barkats, D. A., Baudry, A., Broguière, D., Escoffier, R., Fish, V. L., Greenberg, J., Hecht, M. H., Hiriart, R., Hirota, A., Honma, M., Ho, P. T. P., Impellizzeri, C. M. V., Inoue, M., Kohno, Y., Lopez, B., Martí-Vidal, I., Messias, H., Meyer-Zhao, Z., Mora-Klein, M., Nagar, N. M., Nishioka, H., Oyama, T., Pankratius, V., Perez, J., Phillips, N., Pradel, N., Rottmann, H., Roy, A. L., Ruszczyk, C. A., Shillue, B., Suzuki, S., and Treacy, R.

Published
2018

3. Quantum Key Distribution using Two Coherent States of Light and their Superposition

Author

Nambu, Y., Tomita, A., Chiba-Kohno, Y., and Nakamura, K.

Subjects
Quantum Physics
Abstract

Quantum mechanical complementarity ensures the security of the key-distribution scheme reported by Brassard and Bennet in 1984 (BB84), but does not prohibit use of multi-photons as a signal carrier. We describe a novel BB84 scheme in which two nearly orthogonal coherent states carry the key, and the superposition of these states (cat states) protects the communication channel from eavesdropping. Information leakage to eavesdroppers can be determined from the visibility of the interferential fringes in the distribution of the outcome when a certain quadrature component is measured through homodyne detection. The effect of channel loss and detector inefficiency is discussed., Comment: 20 pages, 4 figures, RevTeX, submitted to PRA, Revised 2000/2/23

Published
1999
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14. Neutralization of Acid Droplets on Plant Leaf Surfaces

Author

Kohno, Y., Matsuki, R., Nomura, S., Mitsunari, K., Nakao, M., Satake, Kenichi, editor, Shindo, Junko, editor, Takamatsu, Takejiro, editor, Nakano, Takanori, editor, Aoki, Shigeru, editor, Fukuyama, Tsutomu, editor, Hatakeyama, Shiro, editor, Ikuta, Kazukamasa, editor, Kawashima, Munetsugu, editor, Kohno, Yoshihisa, editor, Kojima, Satoru, editor, Murano, Kentaro, editor, Okita, Toshiichi, editor, Taoda, Hiroshi, editor, Tsunoda, Kinichi, editor, and Tsurumi, Makoto, editor

Published
2001
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