455 citations · 1.2k across the 17 of their papers we have counts for
17 papers
On-chip quantum feedback control of a superconducting qubit
K. Kakuyanagi, A. Kemp, T. Baba +4
Quantum feedback is a technique for measuring a qubit and applying appropriate feedback depending on the measurement results. Here, we propose a new on-chip quantum feedback method…
Coherent coupling of a superconducting flux-qubit to an electron spin ensemble in diamond
Xiaobo Zhu, Shiro Saito, Alexander Kemp +10
Electron-spin nitrogen-vacancy color centers in diamond are a natural candidate to act as a quantum memory for superconducting qubits because of their large collective coupling and…
Enhanced energy relaxation process of quantum memory coupled with a superconducting qubit
Yuichiro Matsuzaki, Hayato Nakano
For quantum information processing, each physical system has different advantage for the implementation and so hybrid systems to benefit from several systems would be able to provi…
Readout strength dependence of state projection in superconducting qubit
K. Kakuyanagi, H. Nakano, S. Kagei +4
We have controlled the measurement strength of the qubit readout process by using a Josephson bifurcation amplifier (JBA : an AC-driven SQUID). The optimum readout pulse changes th…
Quantum Time-evolution in Qubit Readout Process with a Josephson Bifurcation Amplifier
Hayato Nakano, Shiro Saito, Kouichi Semba +1
We analyzed the Josephson bifurcation amplifier (JBA) readout process of a superconducting qubit quantum mechanically. This was achieved by employing numerical analyses of the dyna…
Long-range and selective coupler for superconducting flux qubits
H. Nakano, K. Kakuyanagi, M. Ueda +1
We propose a qubit-qubit coupling scheme for superconducting flux quantum bits (qubits), where a quantized Josephson junction resonator and microwave irradiation are utilized. The…