37 citations · 124 across the 13 of their papers we have counts for
13 papers
Reverse heat flow with Peltier-induced thermoinductive effect
Kenjiro Okawa, Yasutaka Amagai, Hiroyuki Fujiki +1
The concept of "thermal inductance" expands the options of thermal circuit design. However, the inductive component is the only missing components in thermal circuits, unlike their…
Quantitative comparison of heat flow, guarded-heater and AC Harman methods for thermoelectric module efficiency
Kenjiro Okawa, Yasutaka Amagai, Norihiko Sakamoto +1
The evaluation of thermoelectric conversion efficiency remains challenging owing to the lack of internationally standardized measurement protocols. Commonly used techniques -includ…
Current comparator for both AC and DC ratio measurements with 10-8-level accuracy
Hidekazu Muramatsu, Yuta Kainuma, Hiromitsu Kato +11
Accurate measurements of alternating current (AC) and direct current(DC) ratios are fundamental to electric power metrology. However, conventional current comparators for AC and DC…
Accurate determination of thermoelectric figure of merit using ac Harman method with a four-probe configuration
Kenjiro Okawa, Yasutaka. Amagai, Norihiko Sakamoto +1
The ac Harman method has been used for the direct estimation of dimensionless thermoelectric figure of merit (zT) through ac/dc resistance measurements. However, accurate zT estima…
Active Initialization Experiment of Superconducting Qubit Using Quantum-circuit Refrigerator
Teruaki Yoshioka, Hiroto Mukai, Akiyoshi Tomonaga +5
The initialization of superconducting qubits is one of the essential techniques for the realization of quantum computation. In previous research, initialization above 99\% fidelity…
Coulomb-mediated antibunching of an electron pair surfing on sound
Junliang Wang, Hermann Edlbauer, Aymeric Richard +14
Electron flying qubits are envisioned as potential information link within a quantum computer, but also promise -- alike photonic approaches -- a self-standing quantum processing u…
Generation of a single-cycle acoustic pulse: a scalable solution for transport in single-electron circuits
Junliang Wang, Shunsuke Ota, Hermann Edlbauer +13
The synthesis of single-cycle, compressed optical and microwave pulses sparked novel areas of fundamental research. In the field of acoustics, however, such a generation has not be…
In-flight distribution of an electron within a surface acoustic wave
Hermann Edlbauer, Junliang Wang, Shunsuke Ota +13
Surface acoustic waves (SAW) have large potential to realize quantum-optics-like experiments with single flying electrons employing their spin or charge degree of freedom. For such…
Heat-Driven Electron-Motion in a Nanoscale Electronic Circuit
Shintaro Takada, Giorgos Georgiou, Everton Arrighi +8
We study the interaction between two closely spaced but electrically isolated quasi-one-dimensional electrical wires by a drag experiment. In this work we experimentally demonstrat…
Large-scalable fabrication of improved Bi-Te-based flexible thermoelectric modules using a semiconductor manufacturing process
Kenjiro Okawa, Yasutaka Amagai, Hiroyuki Fujiki +7
Among the several flexible thermoelectric modules in existence, sintered Bi-Te-based modules represent a viable option because of their high output power density and flexibility, w…
Quantum mechanical current-to-voltage conversion with quantum Hall resistance array
Dong-Hun Chae, Mun-Seog Kim, Wan-Seop Kim +2
Accurate measurement of the electric current requires a stable and calculable resistor for an ideal current to voltage conversion. However, the temporal resistance drift of a physi…
Interplay of the inverse proximity effect and magnetic field in out-of-equilibrium single-electron devices
Shuji Nakamura, Yuri A. Pashkin, Mathieu Taupin +11
The magnetic field is shown to affect significantly non-equilibrium quasiparticle (QP) distributions under conditions of inverse proximity effect on the remarkable example of a sin…
Design and Analysis on a Cryogenic Current Amplifier with a Superconducting Microwave Resonator
Yuma Okazaki, Nobu-hisa Kaneko
We propose a new type of cryogenic current amplifiers, in which low-frequency power spectrum of current can be measured through a measurement of microwave response of a superconduc…