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- Akihiko Kandori, Takehiko Miyashita, +6 authors Masahiro Asaka
- Physiological measurement
- 2001

To determine the T wave of a fetal magnetocardiogram (FMCG), we have evaluated the T/QRS ratio and obtained current-arrow maps that indicate weak currents. We measured FMCG signals for 52 normal fetuses and two abnormal fetuses with prolonged QT waves by using three superconducting quantum interference device (SQUID) systems: a nine-channel system, a… (More)

- Koen De Raedt, K . Keimpema, +15 authors David J. Wineland
- 2007

De Raedt et al. (Eur. Phys. J. B 53: 139-142, 2006) have claimed to provide a local realist model for correlations of the singlet state in the familiar Einstein-Podolsky-Rosen-Bohm (EPRB) experiment when time-coincidence is used to decide which detection events should count in the analysis, and furthermore that this suggests that it is possible to construct… (More)

- Herbert De Raedt, Kristel Michielsen, Seiji Miyashita, K . Keimpema
- 2008

The general conclusion of Seevinck and Larsson is that our model exploits the so-called coincidence-time loophole and produces sinusoidal (quantum-like) correlations but does not model the singlet state because it does not violate the relevant Bell inequality derived by Larsson and Gill, since in order to obtain the sinusoidal correlations the probability… (More)

- Fumiko Abe, Hiromasa Akimoto, +290 authors G. Pauletta
- 1996

We present the result of a search for charged Higgs decays of the top quark, produced in pp̄ collisions at √ s = 1.8 TeV. When the charged Higgs is heavy and decays to a tau lepton, which subsequently decays hadronically, the resulting events have a unique signature: large missing transverse energy and the low-charged-multiplicity tau. Data collected in the… (More)

- Peter H . Koehn, Kenji Kondo, +220 authors Silvia Zucchelli
- 1995

F. Abe, M. G. Albrow, S. R. Amendolia, D. Amidei, J. Antos, C. AnwayWiese, G. Apollinari, H. Areti, M. Atac, P. Auchincloss, F. Azfar, P. Azzi, N. Bacchetta, W. Badgett, M. W. Bailey, J. Bao, P. de Barbaro, A. BarbaroGaltieri, V. E. Barnes, B. A. Barnett, P. Bartalini, G. Bauer, T. Baumann, F. Bedeschi, S. Behrends, S. Belforte, G. Bellettini, J. Bellinger,… (More)

- Masamichi Nishino, Cristian Enachescu, Seiji Miyashita, Per Arne Rikvold, Kamel Boukheddaden, François Varret
- Scientific reports
- 2011

Nucleation, commonly associated with discontinuous transformations between metastable and stable phases, is crucial in fields as diverse as atmospheric science and nanoscale electronics. Traditionally, it is considered a microscopic process (at most nano-meter), implying the formation of a microscopic nucleus of the stable phase. Here we show for the first… (More)

- Kenichi Kurihara, Shu Tanaka, Seiji Miyashita
- UAI
- 2009

This paper studies quantum annealing (QA) for clustering, which can be seen as an extension of simulated annealing (SA). We derive a QA algorithm for clustering and propose an annealing schedule, which is crucial in practice. Experiments show the proposed QA algorithm finds better clustering assignments than SA. Furthermore, QA is as easy as SA to implement.

- Tatsuhiko Shirai, Takashi Mori, Seiji Miyashita
- Physical review. E, Statistical, nonlinear, and…
- 2015

We study probability distribution of a steady state of a periodically driven system coupled to a thermal bath by using a quantum master equation in the weak-coupling limit. It is proved that, even when the external field is strong, the probability distribution is independent of the detailed nature of the thermal bath under the following conditions: (i) the… (More)

- Masamichi Nishino, Kamel Boukheddaden, Yusuké Konishi, Seiji Miyashita
- Physical review letters
- 2007

We study the origin of the cooperative nature of spin crossover (SC) between low-spin and high-spin (HS) states from the viewpoint of elastic interactions among molecules. As the size of each molecule changes depending on its spin state, the elastic interaction among the lattice distortions provides the cooperative interaction of the spin states. We develop… (More)

We study the structure of the time evolution of the density matrix in contact with a thermal bath in a standard projection operator scheme. In general, the equation of motions of the density matrix with dissipative effects tends to lead any initial state into a steady state. The reduced density matrix of the system in the steady state is obtained by tracing… (More)