Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Ishikawa, Toyofumi"'
Autor:
Masuda, Shumpei, Kanao, Taro, Goto, Hayato, Matsuzaki, Yuichiro, Ishikawa, Toyofumi, Kawabata, Shiro
Kerr parametric oscillators (KPOs), which can be implemented with superconducting parametrons possessing large Kerr nonlinearity, have been attracting much attention in terms of their applications to quantum annealing, universal quantum computation a
Externí odkaz:
http://arxiv.org/abs/2203.00226
Recently, there have been significant developments to detect nuclear spins with an nitrogen vacancy (NV) center in diamond. However, due to the nature of the short range dipole-dipole interaction, it takes a long time to detect distant nuclear spins
Externí odkaz:
http://arxiv.org/abs/2105.03069
Publikováno v:
Sci. Rep. 11, 11459 (2021)
Pumped at approximately twice the natural frequency, a Josephson parametric oscillator called parametron or Kerr parametric oscillator shows self-oscillation. Quantum annealing and universal quantum computation using self-oscillating parametrons as q
Externí odkaz:
http://arxiv.org/abs/2009.05723
Autor:
Ishikawa, Toyofumi, Yoshizawa, Akio, Mawatari, Yasunori, Kashiwaya, Satoshi, Watanabe, Hideyuki
Publikováno v:
Journal of Applied Physics 126, 064504 (2019)
Magnetometry utilizing a spin qubit in a solid state possesses high sensitivity. In particular, a magnetic sensor with a high spatial resolution can be achieved with the electron-spin states of a nitrogen vacancy (NV) center in diamond. In this study
Externí odkaz:
http://arxiv.org/abs/1808.03784
Autor:
Ishikawa, Toyofumi, Yoshizwa, Akio, Mawatari, Yasunori, Kashiwaya, Satoshi, Watanabe, Hideyuki
Publikováno v:
Phys. Rev. Applied 10, 054059 (2018)
Dynamical decoupling sequences with multiple pulses can be considered to exhibit filter functions for the time evolution of a qubit superposition state. They contribute to the improvement of coherence time and qubit-phase accumulation due to a time-v
Externí odkaz:
http://arxiv.org/abs/1807.00946
Autor:
Lachance-Quirion, Dany, Tabuchi, Yutaka, Ishino, Seiichiro, Noguchi, Atsushi, Ishikawa, Toyofumi, Yamazaki, Rekishu, Nakamura, Yasunobu
Collective excitation modes in solid state systems play a central role in circuit quantum electrodynamics, cavity optomechanics, and quantum magnonics. In the latter, quanta of collective excitation modes in a ferromagnet, called magnons, interact wi
Externí odkaz:
http://arxiv.org/abs/1610.00839
Autor:
Noguchi, Atsushi, Yamazaki, Rekishu, Ataka, Manabu, Fujita, Hiroyuki, Tabuchi, Yutaka, Ishikawa, Toyofumi, Usami, Koji, Nakamura, Yasunobu
Cavity electro-(opto-)mechanics allows us to access not only single isolated but also multiple mechanical modes in a massive object. Here we develop a multi-mode electromechanical system in which a several membrane vibrational modes are coupled to a
Externí odkaz:
http://arxiv.org/abs/1602.01554
Autor:
Hisatomi, Ryusuke, Osada, Alto, Tabuchi, Yutaka, Ishikawa, Toyofumi, Noguchi, Atsushi, Yamazaki, Rekishu, Usami, Koji, Nakamura, Yasunobu
Publikováno v:
Phys. Rev. B 93, 174427 (2016)
Coherent conversion of microwave and optical photons in the single-quantum level can significantly expand our ability to process signals in various fields. Efficient up-conversion of a feeble signal in the microwave domain to the optical domain will
Externí odkaz:
http://arxiv.org/abs/1601.03908
Autor:
Tabuchi, Yutaka, Ishino, Seiichiro, Noguchi, Atsushi, Ishikawa, Toyofumi, Yamazaki, Rekishu, Usami, Koji, Nakamura, Yasunobu
The techniques of microwave quantum optics are applied to collective spin excitations in a macroscopic sphere of ferromagnetic insulator. We demonstrate, in the single-magnon limit, strong coupling between a magnetostatic mode in the sphere and a mic
Externí odkaz:
http://arxiv.org/abs/1508.05290
Autor:
Tabuchi, Yutaka, Ishino, Seiichiro, Noguchi, Atsushi, Ishikawa, Toyofumi, Yamazaki, Rekishu, Usami, Koji, Nakamura, Yasunobu
Rigidity of an ordered phase in condensed matter results in collective excitation modes spatially extending in macroscopic dimensions. Magnon is a quantum of an elementary excitation in the ordered spin system, such as ferromagnet. Being low dissipat
Externí odkaz:
http://arxiv.org/abs/1410.3781