Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Kakuyanagi, Kosuke"'
Autor:
Toida, Hiraku, Kakuyanagi, Kosuke, Abdurakhimov, Leonid V., Hori, Masahiro, Ono, Yukinori, Saito, Shiro
A bismuth-doped silicon substrate was analyzed by using a magnetometer based on a superconducting flux qubit. The temperature dependence of the magnetization indicates that the silicon substrate contains at least two signal sources, intentionally dop
Externí odkaz:
http://arxiv.org/abs/2406.14948
Autor:
Ao, Ziqiao, Ashhab, Sahel, Yoshihara, Fumiki, Fuse, Tomoko, Kakuyanagi, Kosuke, Saito, Shiro, Aoki, Takao, Semba, Kouichi
Publikováno v:
Sci. Rep. 13, 11340 (2023)
We report experimental and theoretical results on the extremely large Lamb shift in a multimode circuit quantum electrodynamics (QED) system in the deep-strong coupling (DSC) regime, where the qubit-resonator coupling strength is comparable to or lar
Externí odkaz:
http://arxiv.org/abs/2303.04114
Autor:
Toida, Hiraku, Sakai, Koji, Teshima, Tetsuhiko F., Hori, Masahiro, Kakuyanagi, Kosuke, Mahboob, Imran, Ono, Yukinori, Saito, Shiro
Publikováno v:
Commun Phys 6, 19 (2023)
We demonstrate magnetometry of cultured neurons on a polymeric film using a superconducting flux qubit that works as a sensitive magnetometer in a microscale area. The neurons are cultured in Fe$^{3+}$ rich medium to increase magnetization signal gen
Externí odkaz:
http://arxiv.org/abs/2206.15164
Autor:
Abdurakhimov, Leonid V., Mahboob, Imran, Toida, Hiraku, Kakuyanagi, Kosuke, Matsuzaki, Yuichiro, Saito, Shiro
Publikováno v:
PRX Quantum 3, 040332 (2022)
Parasitic two-level-system (TLS) defects are one of the major factors limiting the coherence times of superconducting qubits. Although there has been significant progress in characterizing basic parameters of TLS defects, exact mechanisms of interact
Externí odkaz:
http://arxiv.org/abs/2112.05391
Autor:
Abdurakhimov, Leonid V., Mahboob, Imran, Toida, Hiraku, Kakuyanagi, Kosuke, Matsuzaki, Yuichiro, Saito, Shiro
Publikováno v:
Phys. Rev. B 102, 100502 (2020)
It is widely known that spin-locking noise-spectroscopy is a powerful technique for the characterization of low-frequency noise mechanisms in superconducting qubits. Here we show that the relaxation rate of the driven spin-locking state of a qubit ca
Externí odkaz:
http://arxiv.org/abs/2006.05820
Publikováno v:
Phys. Rev. B 102, 094502 (2020)
We control transition frequency of a superconducting flux qubit coupled to a frequency-tunable resonator comprising a direct current superconducting quantum interference device (dc-SQUID) by microwave driving. The dc-SQUID mediates the coupling betwe
Externí odkaz:
http://arxiv.org/abs/2005.06155
Publikováno v:
Appl. Phys. Lett. 116, 194001 (2020)
We report on electron spin resonance spectroscopy measurements using a superconducting flux qubit with a sensing volume of 6 fl. The qubit is read out using a frequency-tunable Josephson bifurcation amplifier, which leads to an inferred measurement s
Externí odkaz:
http://arxiv.org/abs/2003.09131
Autor:
Miyanishi, Koichiro, Matsuzaki, Yuichiro, Toida, Hiraku, Kakuyanagi, Kosuke, Negoro, Makoto, Kitagawa, Masahiro, Saito, Shiro
Publikováno v:
Phys. Rev. A 101, 052303 (2020)
We theoretically analyze the performance of the nuclear magnetic resonance (NMR) spectroscopy with a superconducting flux qubit (FQ). Such NMR with the FQ is attractive because of the possibility to detect the relatively small number of nuclear spins
Externí odkaz:
http://arxiv.org/abs/1906.07386
Autor:
Yoshihara, Fumiki, Fuse, Tomoko, Ao, Ziqiao, Ashhab, Sahel, Kakuyanagi, Kosuke, Saito, Shiro, Aoki, Takao, Koshino, Kazuki, Semba, Kouichi
Publikováno v:
Phys. Rev. Lett. 120, 183601 (2018)
We report on experimentally measured light shifts of superconducting flux qubits deep-strongly coupled to LC oscillators, where the coupling constants are comparable to the qubit and oscillator resonance frequencies. By using two-tone spectroscopy, t
Externí odkaz:
http://arxiv.org/abs/1712.05039
Autor:
Toida, Hiraku, Matsuzaki, Yuichiro, Kakuyanagi, Kosuke, Zhu, Xiaobo, Munro, William J., Yamaguchi, Hiroshi, Saito, Shiro
Publikováno v:
Commun Phys 2, 33 (2019)
Electron paramagnetic resonance (EPR) spectroscopy is an important technology in physics, chemistry, materials science, and biology. Sensitive detection with a small sample volume is a key objective in these areas, because it is crucial, for example,
Externí odkaz:
http://arxiv.org/abs/1711.10148