122 citations · 160 across the 6 of their papers we have counts for
6 papers
Coherent transfer of light polarization to electron spins in a semiconductor
Hideo Kosaka, Hideki Shigyou, Yasuyoshi Mitsumori +5
We demonstrate that the superposition of light polarization states is coherently transferred to electron spins in a semiconductor quantum well. By using time-resolved Kerr rotation…
Theoretical analysis of the optimal conditions for photon-spin quantum state transfer
Y. Rikitake, H. Imamura, H. Kosaka
We analyzed the yield and fidelity of the quantum state transfer (QST) from a photon polarization qubit to an electron spin qubit in a spin-coherent photo detector consisting of a…
Negative Polarization through Photon to Electron Spin Polarization Transfer in GaAs Quantum Wells
H. Kosaka, Y. Rikitake, H. Imamura +2
We demonstrate negative polarization created by light-hole exciton excitation in g-factor engineered GaAs quantum wells measured by time-resolved Kerr rotation and polarization-res…
Effect of exchange interaction on fidelity of quantum state transfer from a photon qubit to an electron-spin qubit
Yoshiaki Rikitake, Hiroshi Imamura
We analyzed the fidelity of the quantum state transfer (QST) from a photon-polarization qubit to an electron-spin-polarization qubit in a semiconductor quantum dot, with special at…
Decoherence of localized spins interacting via RKKY interaction
Yoshiaki Rikitake, Hiroshi Imamura
We theoretically study decoherence of two localized spins interacting via the RKKY interaction in one-, two-, and three-dimensional electron gas. We derive the kinetic equation for…
Dephasing of a qubit coupled with a point-contact detector
Yoshiaki Rikitake, Hiroshi Imamura, Yasuhiro Utsumi +2
The dephasing of a qubit coupled with a point-contact detector is theoretically studied. We calculate the time evolution of the reduced density matrix of qubit by using the perturb…