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14 papers · 1 filter
Quantum Teleportation with Entangled States given by Beam Splittings
Karl-Heinz Fichtner, Masanori Ohya
Quantum teleportation is rigorously discussed with coherent entang led states given by beam splittings. The mathematical scheme of beam splitti ng has been used to study quantum co…
Effect of a Domain Wall on the Conductance Quantization in a Ferromagnetic Nanowire
Katsuyuki Nakanishi, Yoshiko Oi Nakamura
The effect of the domain wall (DW) on the conductance in a ballistic ferromagnetic nanowire (FMNW) is revisited by exploiting a specific perturbation theory which is effective for…
Origin of Superconductivity in 2D-Organic Compounds and High-T_c Cuprates
Hisashi Kondo, Tôru Moriya
A phase diagram is drawn in a parameter space of the nearly half-filled single band two-dimensional Hubbard model with U/t, t'/t and n as the parameters, U, t, t' and n being the o…
A Dark Cloud Associated an Unidentified EGRET Source
T. Oka, N. Kawai, T. Naito +5
CO J=1-0 mapping observations of the dark nebula Lynds 227, which is possibly associated with the unidentified EGRET source 2EG J1811-2339, are presented. We detected a large amoun…
Specific-heat evidence for strong electron correlations in the thermoelectric material (Na,Ca)Co_{2}O_{4}
Yoichi Ando, N. Miyamoto, Kouji Segawa +2
The specific heat of (Na,Ca)Co_{2}O_{4} is measured at low-temperatures to determine the magnitude of the electronic specific-heat coefficient γ, in an attempt to gain an insight i…
Critical Exponents of O(N) Scalar Model at Temperatures below the Critical Value using Auxiliary Mass Method
K. Ogure, J. Sato
We investigate a phase transition of the O(N) invariant scalar model using the auxiliary mass method. We determine the critical exponent by calculating an effective potential b…