Search Results - "Masuda, Shumpei"

Fast-forward of adiabatic dynamics in quantum mechanics by Masuda, Shumpei, Nakamura, Katsuhiro

“…We propose a method to accelerate adiabatic dynamics of wave functions (WFs) in quantum mechanics to obtain a final adiabatic state except for the spatially…”
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Controls of a superconducting quantum parametron under a strong pump field by Masuda, Shumpei, Ishikawa, Toyofumi, Matsuzaki, Yuichiro, Kawabata, Shiro

“…Pumped at approximately twice the natural frequency, a Josephson parametric oscillator called parametron or Kerr parametric oscillator shows self-oscillation…”
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Accelerating the reaction rates of nucleation growth and solid-state diffusion in electrochemical lithium insertion into MgMn2O4 by controlling the particle size by Ariyoshi, Kingo, Masuda, Shumpei

“…Lithium insertion reactions occur via two main processes: nucleation growth in the initial stage and three-dimensional diffusion in the subsequent stage. This…”
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Clarification of particle size dependence on the rate capabilities of Li[Ni1/2Mn3/2]O4 materials and electrodes by the dilute electrode method by Ariyoshi, Kingo, Sugawa, Jun, Masuda, Shumpei

“…Improving the rate capability of lithium insertion electrodes is essential for high-power lithium-ion batteries used in automobile applications. Several…”
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Effects of higher levels of qubits on control of qubit protected by a Josephson quantum filter by Masuda, Shumpei, Koshino, Kazuki

“…Abstract A Josephson quantum filter (JQF) protects a data qubit (DQ) from the radiative decay into transmission lines (TLs) in superconducting quantum…”
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Quantum-circuit refrigerator by Tan, Kuan Yen, Partanen, Matti, Lake, Russell E., Govenius, Joonas, Masuda, Shumpei, Möttönen, Mikko

“…Quantum technology promises revolutionizing applications in information processing, communications, sensing and modelling. However, efficient on-demand cooling…”
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Measurement-based preparation of stable coherent states of a Kerr parametric oscillator by Suzuki, Yuta, Watabe, Shohei, Kawabata, Shiro, Masuda, Shumpei

“…Kerr parametric oscillators (KPOs) have attracted increasing attention in terms of their application to quantum information processing and quantum simulations…”
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Broadband Lamb shift in an engineered quantum system by Silveri, Matti, Masuda, Shumpei, Sevriuk, Vasilii, Tan, Kuan Y., Jenei, Máté, Hyyppä, Eric, Hassler, Fabian, Partanen, Matti, Goetz, Jan, Lake, Russell E., Grönberg, Leif, Möttönen, Mikko

“…The shift of the energy levels of a quantum system owing to broadband electromagnetic vacuum fluctuations—the Lamb shift—has been central for the development…”
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Acceleration and deceleration of quantum dynamics based on inter-trajectory travel with fast-forward scaling theory by Masuda, Shumpei, Koenig, Jacob, Steele, Gary A.

“…Quantum information processing requires fast manipulations of quantum systems in order to overcome dissipative effects. We propose a method to accelerate…”
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Spectroscopy of flux-driven Kerr parametric oscillators by reflection coefficient measurement by Yamaguchi, Aiko, Masuda, Shumpei, Matsuzaki, Yuichiro, Yamaji, Tomohiro, Satoh, Tetsuro, Morioka, Ayuka, Kawakami, Yohei, Igarashi, Yuichi, Shirane, Masayuki, Yamamoto, Tsuyoshi

“…Abstract We report the spectroscopic characterization of a Kerr parametric oscillator (KPO) based on the measurement of its reflection coefficient under a…”
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Selective Vibrational Population Transfer using Combined Stimulated Raman Adiabatic Passage and Counter-Diabatic Fields by Masuda, Shumpei, Rice, Stuart A

“…We report studies of state-to-state vibrational energy transfer in an isolated polyatomic molecule driven by combined stimulated Raman adiabatic passage…”
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Fast-forward scaling theory for phase imprinting on a BEC: creation of a wave packet with uniform momentum density and loading to Bloch states without disturbance by Masuda, Shumpei, Nakamura, Katsuhiro, Nakahara, Mikio

“…We study phase imprinting on Bose-Einstein condensates (BECs) with the fast-forward scaling theory revealing a nontrivial scaling property in quantum dynamics…”
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Rotation of the Orientation of the Wave Function Distribution of a Charged Particle and its Utilization by Masuda, Shumpei, Rice, Stuart A

“…We describe a method for selecting and sorting particles in an ion trap with respect to charge and mass. The method exploits a so-called shortcut to adiabatic…”
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Observation of microwave absorption and emission from incoherent electron tunneling through a normal-metal–insulator–superconductor junction by Masuda, Shumpei, Tan, Kuan Y., Partanen, Matti, Lake, Russell E., Govenius, Joonas, Silveri, Matti, Grabert, Hermann, Möttönen, Mikko

“…We experimentally study nanoscale normal-metal–insulator–superconductor junctions coupled to a superconducting microwave resonator. We observe that…”
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Interference effects of helical current: Geometry-dependent spin polarization of transmitted electrons by Masuda, Shumpei, Kuramoto, Yoshio

“…Quantum interference effects of the helical spin current are explored in two-dimensional topological insulators by means of a one-dimensional chain model that…”
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Acceleration of adiabatic transport of interacting particles and rapid manipulations of a dilute Bose gas in the ground state by Masuda, Shumpei

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Theoretical Study on Spin-Selective Coherent Electron Transfer in a Quantum Dot Array by Masuda, Shumpei, Tan, Kuan Yen, Nakahara, Mikio

“…Recently, we proposed the spin-selective coherent electron transfer in a silicon-quantum-dot array. It requires temporal tuning of two pulses of an oscillating…”
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Acceleration of adiabatic quantum dynamics in electromagnetic fields by Masuda, Shumpei, Nakamura, Katsuhiro

“…We show a method to accelerate quantum adiabatic dynamics of wave functions under electromagnetic field (EMF) by developing the preceding theory [Masuda and…”
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Effects of overvoltage and temperature on the lithium insertion kinetics of MgMn2O4 by Ariyoshi, Kingo, Masuda, Shumpei

“…•Chronoamperometry was performed at various temperatures and overpotentials.•A high overvoltage accelerates the initial nucleation-growth process.•The kinetics…”
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High-fidelity rapid ground-state loading of an ultracold gas into an optical lattice by Masuda, Shumpei, Nakamura, Katsuhiro, del Campo, Adolfo

“…A protocol is proposed for the rapid coherent loading of a Bose-Einstein condensate into the ground state of an optical lattice, without residual excitation…”
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