1.1k citations · 1.9k across the 27 of their papers we have counts for
27 papers
Observation of individual vortex penetration in a coplanar superconducting resonator
Kirill Shulga, Shunsuke Nishimura, Pavel A. Volkov +7
We demonstrate the microwave signatures of individual Abrikosov-vortex penetration events in superconducting microwave resonators. resonators with a narrowed region near the…
Visualization of Current-Driven Vortex Formation in High- Cuprate Superconductors
Shunsuke Nishimura, Takeyuki Tsuji, Takayuki Iwasaki +3
Type-II superconductors exhibit hysteretic behavior due to the presence of quantum vortices, and the order in which temperature and external field are varied plays a decisive role.…
Optical charge state manipulation of lead-vacancy centers in diamond
Yiyang Chen, Yoshiyuki Miyamoto, Eiki Ota +5
Group-IV vacancy centers in diamond exhibit excellent optical and spin coherence properties, making them highly promising and scalable spin qubit candidates. Since only specific ch…
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…
Narrow Inhomogeneous Distribution and Charge State Stabilization of Lead-Vacancy Centers in Diamond
Ryotaro Abe, Peng Wang, Takashi Taniguchi +4
Lead-vacancy (PbV) centers in diamond with a large ground state splitting are expected to be a building block of quantum network nodes. Due to the heaviness of the Pb atom, it is c…
Performance Evaluation of a Diamond Quantum Magnetometer for Biomagnetic Sensing: A Phantom Study
Naota Sekiguchi, Yuta Kainuma, Motofumi Fushimi +10
We employ a dry-type phantom to evaluate the performance of a diamond quantum magnetometer with a high sensitivity of about from the viewpoint of practica…
Charge state transition of spectrally stabilized tin-vacancy centers in diamond
Keita Ikeda, Yiyang Chen, Peng Wang +5
Solid-state quantum emitters are an important platform for quantum information processing. The fabrication of the emitters with stable photon frequency and narrow linewidth is a fu…
Fast coherent control of nitrogen-14 spins associated with nitrogen-vacancy centers in diamonds using dynamical decoupling
Kosuke Mizuno, Ikuya Fujisaki, Hiroyoshi Tomioka +5
A nitrogen-vacancy (NV) center in a diamond enables the access to an electron spin, which is expected to present highly sensitive quantum sensors. Although exploiting a nitrogen nu…
Transform-Limited Photon Emission From a Lead-Vacancy Center in Diamond Above 10 K
Peng Wang, Lev Kazak, Katharina Senkalla +9
Transform-limited photon emission from quantum emitters is essential for high-fidelity entanglement generation. In this study, we report the coherent optical property of a single n…
Extending spin dephasing time of perfectly aligned Nitrogen-Vacancy centers by mitigating stress distribution on highly misoriented chemical-vapor-deposition diamond
T. Tsuji, T. Sekiguchi, T. Iwasaki +1
Extending the spin-dephasing time (T2*) of perfectly aligned nitrogen-vacancy (NV) centers in large-volume chemical vapor deposition (CVD) diamonds leads to enhanced DC magnetic se…
Wide-field quantitative magnetic imaging of superconducting vortices using perfectly aligned quantum sensors
Shunsuke Nishimura, Taku Kobayashi, Daichi Sasaki +5
Various techniques have been applied to visualize superconducting vortices, providing clues to their electromagnetic response. Here, we present a wide-field, quantitative imaging o…
Identical Photons from Multiple Tin-Vacancy Centers in Diamond
Yasuyuki Narita, Peng Wang, Kazuki Oba +5
We report the narrow inhomogeneous distribution of the zero-phonon line from tin-vacancy (SnV) centers in diamond and the overlap of spectra from multiple separated SnV centers. Ph…
Coherence of a charge stabilised tin-vacancy spin in diamond
Johannes Görlitz, Dennis Herrmann, Philipp Fuchs +8
Quantum information processing (QIP) with solid state spin qubits strongly depends on the efficient initialisation of the qubit's desired charge state. While the negatively charged…
Low-Temperature Spectroscopic Investigation of Lead-Vacancy Centers in Diamond Fabricated by High-Pressure and High-Temperature Treatment
Peng Wang, Takashi Taniguchi, Yoshiyuki Miyamoto +2
We report the optical observation of lead-vacancy (PbV) centers in diamond fabricated by Pb ion implantation and subsequent high-temperature annealing (2100 °C) under high pressure…
Millimetre-scale magnetocardiography of living rats using a solid-state quantum sensor
Keigo Arai, Akihiro Kuwahata, Daisuke Nishitani +16
A key challenge in cardiology is the non-invasive imaging of electric current propagation occurring in the cardiovascular system at an intra-cardiac scale. A promising approach for…
Label-free phase change detection of lipid bilayers using nanoscale diamond magnetometry
Hitoshi Ishiwata, Hiroshi C. Watanabe, Shinya Hanashima +2
The NV center in a diamond is a quantum sensor with exceptional quality for highly sensitive nanoscale analysis of NMR spectra and thermometry. In this study, we investigate nanosc…
Vector Electrometry in a Wide-Gap Semiconductor Device Using a Spin Ensemble Quantum Sensor
Yang, Bang, Takuya Murooka +8
Nitrogen-vacancy (NV) centers in diamond work as a quantum electrometer. Using an ensemble state of NV centers, we propose vector electrometry and demonstrate measurements in a dia…
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…
Spectroscopic Investigations of Negatively Charged Tin-Vacancy Centres in Diamond
Johannes Görlitz, Dennis Herrmann, Gergő Thiering +9
The recently discovered negatively charged tin-vacancy centre in diamond is a promising candidate for applications in quantum information processing (QIP). We here present a detail…
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…
Tin-Vacancy Quantum Emitters in Diamond
Takayuki Iwasaki, Yoshiyuki Miyamoto, Takashi Taniguchi +4
Tin-vacancy (SnV) color centers were created in diamond by ion implantation and subsequent high temperature annealing up to 2100 °C at 7.7 GPa. The first-principles calculation sug…
Photoluminescence excitation spectroscopy of SiV and GeV color center in diamond
Stefan Häußler, Gergő Thiering, Andreas Dietrich +8
Color centers in diamond are important quantum emitters for a broad range of applications ranging from quantum sensing to quantum optics. Understanding the internal energy level st…
Perfectly Aligned Shallow Ensemble Nitrogen-Vacancy Centers in (111) Diamond
Hitoshi Ishiwata, Makoto Nakajima, Kosuke Tahara +3
We report the formation of perfectly aligned, high-density, shallow nitrogen vacancy (NV) centers on the () surface of a diamond. The study involved step-flow growth with a hi…