Aritoki Suzuki
A5051444570- Superconducting and THz Device Technology
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Physics of Superconductivity and Magnetism
- Dark Matter and Cosmic Phenomena
- Microwave Engineering and Waveguides
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Galaxies: Formation, Evolution, Phenomena
- Antenna Design and Optimization
- Precipitation Measurement and Analysis
- Advanced Antenna and Metasurface Technologies
- Advanced Thermodynamic Systems and Engines
- Particle Detector Development and Performance
- Adaptive optics and wavefront sensing
- Calibration and Measurement Techniques
- Astrophysics and Star Formation Studies
- Computational Physics and Python Applications
- Advanced Frequency and Time Standards
- Satellite Communication Systems
- Particle physics theoretical and experimental studies
- Photonic and Optical Devices
- Stellar, planetary, and galactic studies
- Advanced Thermodynamics and Statistical Mechanics
Stony Brook University
2025
Lawrence Berkeley National Laboratory
2016-2024
National Institute of Information and Communications Technology
2024
Princeton University
2018-2024
Stockholm University
2024
High Energy Accelerator Research Organization
2014-2022
Institute of Space and Astronautical Science
2022
University of Colorado Boulder
2022
Japan Aerospace Exploration Agency
2022
Université Paris-Saclay
2020
We report a measurement of the B-mode polarization power spectrum in cosmic microwave background (CMB) using Polarbear experiment Chile. The faint signature carries information about universe's entire history gravitational structure formation, and inflation that may have occurred very early universe. Our covers angular multipole range 500 < ℓ 2100 is based on observations an effective sky area 25 with 35 resolution at 150 GHz. On these scales, lensing CMB by intervening universe expected to...
Abstract We report an improved measurement of the cosmic microwave background B -mode polarization power spectrum with Polarbear experiment at 150 GHz. By adding new data collected during second season observations (2013–2014) to re-analyzed from first (2012–2013), we have reduced twofold band-power uncertainties. The band powers are reported over angular multipoles , where dominant signal is expected be due gravitational lensing E -modes. reject null hypothesis no a confidence 3.1 σ...
We constrain anisotropic cosmic birefringence using four-point correlations of even-parity $E$-mode and odd-parity $B$-mode polarization in the microwave background measurements made by POLARization Background Radiation (POLARBEAR) experiment its first season observations. find that signal from any parity-violating processes is consistent with zero. The Faraday rotation can be compared equivalent quantity generated primordial magnetic fields if they existed. POLARBEAR nondetection translates...
A new technique, first performed using the South Pole Telescope, that allows gravitational deflections of cosmic microwave background to be measured from photon polarization, gets further support measurements by POLARBEAR collaboration.
Abstract The performance of superconducting qubits is degraded by a poorly characterized set energy sources breaking the Cooper pairs responsible for superconductivity, creating condition often called “quasiparticle poisoning”. Both and low threshold dark matter calorimeters have observed excess bursts quasiparticles or phonons that decrease in rate with time. Here, we show silicon crystal glued to its holder exhibits low-energy phonon events more than two orders magnitude larger...
We present the design and characterization of POLARBEAR experiment. will measure polarization cosmic microwave background (CMB) on angular scales ranging from experiment's 3.5 arcminute beam size to several degrees. The experiment utilizes a unique focal plane 1,274 antenna-coupled, sensitive TES bolometers cooled 250 milliKelvin. Employing this along with stringent control over systematic errors, has sensitivity detect expected small scale B-mode signal due gravitational lensing search for...
LiteBIRD [Lite (Light) satellite for the studies of B-mode polarization and Inflation from cosmic background Radiation Detection] is a small to map microwave (CMB) radiation over full sky at large angular scales with unprecedented precision. Cosmological inflation, which leading hypothesis resolve problems in Big Bang theory, predicts that primordial gravitational waves were created during inflationary era. Measurements CMB are known as best probe detect waves. The working group authorized...
POLARBEAR-2 (PB-2) is a cosmic microwave background (CMB) polarization experiment that will be located in the Atacama highland Chile at an altitude of 5200 m. Its science goals are to measure CMB signals originating from both primordial gravitational waves and weak lensing. PB-2 designed tensor scalar ratio, r, with precision {\sigma}(r) < 0.01, sum neutrino masses, {\Sigma}m{\nu}, {\sigma}({\Sigma}m{\nu}) 90 meV. To achieve these goals, employ 7588 transition-edge sensor bolometers 95 GHz...
The Polarbear Cosmic Microwave Background (CMB) polarization experiment is currently observing from the Atacama Desert in Northern Chile. It will characterize expected B-mode due to gravitational lensing of CMB, and search for possible signature inflationary waves. Its 250 mK focal plane detector array consists 1,274 polarization-sensitive antenna-coupled bolometers, each with an associated lithographed band-defining filter. Each detector's planar antenna structure coupled telescope's...
The South Pole Telescope (SPT) is a millimeter-wavelength telescope designed for high-precision measurements of the cosmic microwave background (CMB). SPT measures both temperature and polarization CMB with large aperture, resulting in high resolution maps sensitive to signals across wide range angular scales on sky. With these data, has potential make broad cosmological measurements. These include constraining effect massive neutrinos large-scale structure formation as well cleaning...
Abstract We quantify the calibration requirements for systematic uncertainties next-generation ground-based observatories targeting large-angle B-mode polarization of Cosmic Microwave Background, with a focus on Simons Observatory (SO). explore gain calibration, bandpass center frequencies, and angles, including frequency variation latter across bandpass. find that frequencies must be known to percent levels or less avoid biases tensor-to-scalar ratio r order Δ r∼10 -3 , in line previous...
The Simons Array is an expansion of the POLARBEAR cosmic microwave background (CMB) polarization experiment currently observing from Atacama Desert in Northern Chile. This will create array three 3.5m telescopes each coupled to a multichroic bolometric receiver. have sensitivity produce ≥ 5σ detection inationary gravitational waves with tensor-to-scalar ratio r 0:01, detect known minimum 58 meV sum neutrino masses 3σ confidence when combined next-generation baryon acoustic oscillation...
We present a measurement of the $B$-mode polarization power spectrum cosmic microwave background (CMB) using taken from July 2014 to December 2016 with POLARBEAR experiment. The CMB spectra are measured observations at 150 GHz an instantaneous array sensitivity $\mathrm{NET}_\mathrm{array}=23\, \mu \mathrm{K} \sqrt{\mathrm{s}}$ on 670 square degree patch sky centered (RA, Dec)=($+0^\mathrm{h}12^\mathrm{m}0^\mathrm{s},-59^\circ18^\prime$). A continuously rotating half-wave plate is used...
We report an improved measurement of the degree-scale cosmic microwave background $B$-mode angular-power spectrum over 670 square-degree sky area at 150 GHz with POLARBEAR. In original analysis data, errors in angle continuously rotating half-wave plate, a polarization modulator, caused significant data loss. By introducing angle-correction algorithm, volume is increased by factor 1.8. new using larger set. find measured consistent $\Lambda$CDM model Galactic dust foregrounds. estimate...
We have developed epoxy-based, broadband anti-reflection coatings for millimeter-wave astrophysics experiments with cryogenic optics. By using multiple-layer where each layer steps in dielectric constant, we achieved low reflection over a wide bandwidth. suppressed the from an alumina disk to 10% fractional bandwidths of 92% and 104% two-layer three-layer coatings, respectively. The constants epoxies were tuned between 2.06 7.44 by mixing three types epoxy doping strontium titanate powder...
Atmosphere is one of the most important noise sources for ground-based cosmic microwave background (CMB) experiments. By increasing optical loading on detectors, it amplifies their effective noise, while its fluctuations introduce spatial and temporal correlations between detected signals. We present a physically motivated 3d-model atmosphere total intensity emission in millimeter sub-millimeter wavelengths. derive new analytical estimate correlation detectors time-ordered data as function...
The Simons Array is a next generation cosmic microwave background (CMB) polarization experiment whose science target precision measurement of the B-mode pattern produced both by inflation and gravitational lensing. As continuation extension successful POLARBEAR experimental program, will consist three cryogenic receivers each featuring multichroic bolometer arrays mounted onto separate 3.5m telescopes. first these, also called POLARBEAR-2A, be to deploy in late 2016 has large diameter focal...