315 citations
- Japan Science and Technology AgencyJP8 papers
- The University of TokyoJP5 papers
- RIKENJP3 papers
- Adam Mickiewicz University in PoznańPL2 papers
- Tohoku UniversityJP2 papers
- VTT Technical Research Centre of FinlandFI2 papers
- Delft University of TechnologyNL1 paper
- Imperial College LondonGB1 paper
- Institute for Molecular ScienceJP1 paper
- Kobe UniversityJP1 paper
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA)1 paper
- London Institute for Mathematical SciencesGB1 paper
5 papers · 1 filter
Photonic band calculation in the form of including evanescent waves
Kikuo Cho, Jun Ushida, Motoaki Bamba
We give a general method to calculate photonic band structure in the form of wave number as a function of frequency , which is required whenever we want to calculate signal…
Circuit with small-capacitance high-quality Nb Josephson junctions
Michio Watanabe, Yasunobu Nakamura, Jaw-Shen Tsai
We have developed a fabrication process for nanoscale tunnel junctions which includes focused-ion-beam etching from different directions. By applying the process to a Nb/(Al-)Al_2O…
Binegativity and geometry of entangled states in two qubits
Satoshi Ishizaka
We prove that the binegativity is always positive for any two-qubit state. As a result, as suggested by the previous works, the asymptotic relative entropy of entanglement in two q…
Majorization criterion for distillability of a bipartite quantum state
Tohya Hiroshima
Bipartite quantum states are classified into three categories: separable states, bound entangled states, and free entangled states. It is of great importance to characterize these…
Analytical formula connecting entangled state and the closest disentangled state
Satoshi Ishizaka
The separable state closest to a given entangled state in the relative entropy measure is called the closest disentangled state. We provide an analytical formula connecting the ent…