81 citations · 801 across the 42 of their papers we have counts for
5 papers · 1 filter
Impurity effects in a two-dimensional topological superconductor: A link of Tc-robustness with a topological number
Yuki Nagai, Yukihiro Ota, Masahiko Machida
Impurity effects are probes for revealing an unconventional property in superconductivity. We study effects of non-magnetic impurities, in a 2D topological superconductor with s-wa…
A temporal steering inequality
Yueh-Nan Chen, Che-Ming Li, Neill Lambert +4
Quantum steering is the ability to remotely prepare different quantum states by using entangled pairs as a resource. Very recently, the concept of steering has been quantified with…
Massless collective excitations in frustrated multi-band superconductors
Keita Kobayashi, Masahiko Machida, Yukihiro Ota +1
We study collective excitations in three- and four-band superconductors with inter-band frustration, which causes neither 0 nor inter-band phases in the superconducting state.…
Determining eigenvalues of a density matrix with minimal information in a single experimental setting
Tohru Tanaka, Yukihiro Ota, Mitsunori Kanazawa +3
Eigenvalues of a density matrix characterize well the quantum state's properties, such as coherence and entanglement. We propose a simple method to determine all the eigenvalues of…
Numerical construction of a low-energy effective Hamiltonian in a self-consistent Bogoliubov-de Gennes approach of superconductivity
Yuki Nagai, Yasushi Shinohara, Yasunori Futamura +2
We propose a fast and efficient approach for solving the Bogoliubov-de Gennes (BdG) equations in superconductivity, with a numerical matrix-size reduction procedure proposed by Sak…