202 citations · 552 across the 9 of their papers we have counts for
10 papers
Vacancy-mediated nitrogen diffusion and aggregation via high-fluence electron beam irradiation in HPHT synthesized diamond crystal
Chikara Shinei, Yuta Masuyama, Jun Chen +5
The negatively charged nitrogen vacancy (NV-) center in diamond is a promising point defect for highly sensitive quantum sensing. The formation of high-density NV- centers is essen…
Long Rayleigh length confocal microscope: A fast evaluation tool for obtaining quantum properties of color centers
Yuta Masuyama, Chikara Shinei, Shuya Ishii +4
Color centers in wide band-gap semiconductors, which have superior quantum properties even at room temperature and atmospheric pressure, have been actively applied to quantum sensi…
Simultaneous Wide-field Imaging of Phase and Magnitude of AC Magnetic Signal Using Diamond Quantum Magnetometry
Kosuke Mizuno, Hitoshi Ishiwata, Yuta Masuyama +2
Spectroscopic analysis of AC magnetic signal using diamond quantum magnetometry is a promising technique for inductive imaging. Conventional dynamic decoupling like XY8 provides a…
Speeding-up a quantum refrigerator via counter-diabatic driving
Ken Funo, Neill Lambert, Bayan Karimi +3
We study the application of a counter-diabatic driving (CD) technique to enhance the thermodynamic efficiency and power of a quantum Otto refrigerator based on a superconducting qu…
Wide-field diamond magnetometry with millihertz frequency resolution and nanotesla sensitivity
Kosuke Mizuno, Makoto Nakajima, Hitoshi Ishiwata +3
The nitrogen-vacancy (NV) center in diamond allows room-temperature wide-field quantum magnetometry and metrology for a small volume, which is an important technology for applicati…
Highly sensitive macro-scale diamond magnetometer operated by dynamical decoupling sequence with coplanar waveguide resonator
Yuta Masuyama, Kousuke Mizuno, Hayato Ozawa +5
Ultimate sensitivity for quantum magnetometry using nitrogen-vacancy (NV) centers in diamond is limited by number of NV centers and coherence time. Microwave irradiation with a hig…
Information-to-work conversion by Maxwell's demon in a superconducting circuit-QED system
Y. Masuyama, K. Funo, Y. Murashita +6
The gedanken experiment of Maxwell's demon has led to the studies concerning the foundations of thermodynamics and statistical mechanics. The demon measures fluctuations of a syste…
Nonclassical photon number distribution in a superconducting cavity under a squeezed drive
S. Kono, Y. Masuyama, T. Ishikawa +5
A superconducting qubit in the strong dispersive regime of a circuit quantum electrodynamics system is a powerful probe for microwave photons in a cavity mode. In this regime, a qu…
Dephasing and dissipation in qubit thermodynamics
J. P. Pekola, Y. Masuyama, Y. Nakamura +2
We analyze the stochastic evolution and dephasing of a qubit within the quantum jump (QJ) approach. It allows one to treat individual realizations of inelastic processes, and in th…
Controlling phase separation of binary Bose-Einstein condensates via mixed-spin-channel Feshbach resonance
Satoshi Tojo, Yoshihisa Taguchi, Yuta Masuyama +3
We investigate controlled phase separation of a binary Bose-Einstein condensate (BEC) in the proximity of mixed-spin-channel Feshbach resonance in the |F = 1, mF = +1> and |F = 2,m…