Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Kanazawa, Naoki"'
The fidelity of certain gates on noisy quantum computers may be improved when they are implemented using more than two levels of the involved transmons. The main impediments to achieving this potential are the dynamic gate phase errors that cannot be
Externí odkaz:
http://arxiv.org/abs/2405.14752
Spin torque nano-oscillators realized by magnetization dynamics trapped in a current-induced potential are reported. We fabricated Ni$_{81}$Fe$_{19}$/Pt nanostructures and measured current-induced microwave emission from the structures. The result sh
Externí odkaz:
http://arxiv.org/abs/2403.11618
Autor:
Hirasaki, Yuta, Daimon, Shunsuke, Kanazawa, Naoki, Itoko, Toshinari, Tokunari, Masao, Saitoh, Eiji
We have investigated temporal fluctuation of superconducting qubits via the time-resolved measurement for an IBM Quantum system. We found that the qubit error rate abruptly changes during specific time intervals. Each high error state persists for se
Externí odkaz:
http://arxiv.org/abs/2402.05409
Qutrit state readout is an important technology not only for execution of qutrit algorithms but also for erasure detection in error correction circuits and leakage error characterization of the gate set. Conventional technique using a specialized IQ
Externí odkaz:
http://arxiv.org/abs/2309.11303
Native multi-qubit parity gates have various potential quantum computing applications, such as entanglement creation, logical state encoding and parity measurement in quantum error correction. Here, using simultaneous cross-resonance drives on two co
Externí odkaz:
http://arxiv.org/abs/2309.11287
Publikováno v:
Applied Physics Letters 123, 184002 (2023)
We have investigated instability of a superconducting quantum computer by continuously monitoring the qubit output. We found that qubits exhibit a step-like change in the error rates. This change is repeatedly observed, and each step persists for sev
Externí odkaz:
http://arxiv.org/abs/2307.04337
Implementation of high-fidelity gate operations on integrated-qubit systems is of vital importance for fault-tolerant quantum computation. Qubit frequency allocation is an essential part of improving control fidelity. A metric for qubit frequency all
Externí odkaz:
http://arxiv.org/abs/2302.12816
Publikováno v:
Phys. Rev. Applied 17, 064061 (2022)
The performance of a quantum processor depends on the characteristics of the device and the quality of the control pulses. Characterizing cloud-based quantum computers and calibrating the pulses that control them is necessary for high-fidelity operat
Externí odkaz:
http://arxiv.org/abs/2202.06981
Quantum computation is conventionally performed using quantum operations acting on two-level quantum bits, or qubits. Qubits in modern quantum computers suffer from inevitable detrimental interactions with the environment that cause errors during com
Externí odkaz:
http://arxiv.org/abs/2109.00558
We introduce a Bayesian method for the estimation of single qubit errors in quantum devices, and use it to characterize these errors on three 27-qubit superconducting qubit devices. We self-consistently estimate up to seven parameters of each qubit's
Externí odkaz:
http://arxiv.org/abs/2108.10686