72 citations · 142 across the 3 of their papers we have counts for
3 papers
cond-mat.supr-con2009★ 16 cited
Intergrain Josephson Currents in Multigap Superconductors: Microscopic Origin of Low Intergrain Critical Current and Its Recovery Potential in Iron-Pnictide Materials
Yukihiro Ota, Masahiko Machida, Tomio Koyama
We microscopically examine the intergrain Josephson current in iron-pnictide superconductors in order to solve the puzzle of why the intergrain current is much lower than the intra…
quant-ph2009★ 54 cited
Composite pulses in NMR as non-adiabatic geometric quantum gates
Yukihiro Ota, Yasusi Kondo
We show that some composite pulses widely employed in NMR experiments are regarded as non-adiabatic geometric quantum gates with Aharanov-Anandan phases. Thus, we reveal the presen…
cond-mat.supr-con2009★ 72 cited
Theory of heterotic SIS Josephson junctions between single- and multi-gap superconductors
Yukihiro Ota, Masahiko Machida, Tomio Koyama +1
Using the functional integral method, we construct a theory of heterotic SIS Josephson junctions between single- and two-gap superconductors. The theory predicts the presence of in…