Keiichi Edamatsu
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Explore the profile of Keiichi Edamatsu including associated specialties, affiliations and a list of published articles.
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20
Citations
66
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Recent Articles
1.
Mitsumori Y, Uedaira K, Shimomura S, Edamatsu K
Opt Express
. 2021 Apr;
29(7):10386-10394.
PMID: 33820174
We develop a transient photoinduced Kerr rotation spectroscopy technique using a heterodyne detection scheme to study spin dynamics of microscopic quantum states in solids, such as single quantum dots and...
2.
Kaneda F, Oikawa J, Yabuno M, China F, Miki S, Terai H, et al.
Opt Express
. 2020 Dec;
28(26):38993-39004.
PMID: 33379457
Tailoring spectral properties of photon pairs is of great importance for optical quantum information and measurement applications. High-resolution spectral measurement is a key technique for engineering spectral properties of photons,...
3.
Yoshino T, Yamaura D, Komiya M, Sugawara M, Mitsumori Y, Niwano M, et al.
Opt Express
. 2020 Dec;
28(26):38527-38538.
PMID: 33379421
Enhanced manipulation and analysis of bio-particles using light confined in nano-scale dielectric structures has proceeded apace in the last several years. Small mode volumes, along with the lack of a...
4.
Sugawara M, Mitsumori Y, Edamatsu K, Sadgrove M
Opt Express
. 2020 Jul;
28(13):18938-18945.
PMID: 32672182
Recently, much research concerning the combination of nano-scale waveguides with nano-crystals and other nano-particles has been reported because of possible applications in the field of quantum information and communication. The...
5.
Catano-Lopez S, Santiago-Condori J, Edamatsu K, Matsumoto N
Phys Rev Lett
. 2020 Jun;
124(22):221102.
PMID: 32567925
We present the development of a high-Q monolithic silica pendulum weighing 7 milligram. The measured Q value for the pendulum mode at 2.2 Hz was 2.0×10^{6}. To the best of...
6.
Matsumoto N, Catano-Lopez S, Sugawara M, Suzuki S, Abe N, Komori K, et al.
Phys Rev Lett
. 2019 Mar;
122(7):071101.
PMID: 30848624
Gravity generated by large masses has been observed using a variety of probes from atomic interferometers to torsional balances. However, gravitational coupling between small masses has never been observed so...
7.
Kaneda F, Suzuki H, Shimizu R, Edamatsu K
Opt Express
. 2019 Jan;
27(2):1416-1424.
PMID: 30696207
We report a simple scheme for direct generation of frequency-bin entangled photon pairs via spontaneous parametric downconversion. Our fabricated nonlinear optical crystal with two different poling periods can simultaneously satisfy...
8.
Sadgrove M, Sugawara M, Mitsumori Y, Edamatsu K
Sci Rep
. 2017 Dec;
7(1):17085.
PMID: 29213054
Two port optical devices couple light to either port dependent on the input photon state. An important class of two-port devices is that of evanescently-coupled interfaces where chirality of photon...
9.
Abe N, Mitsumori Y, Sadgrove M, Edamatsu K
Sci Rep
. 2017 Apr;
7:46722.
PMID: 28443612
Polarization is one of the fundamental properties of light, providing numerous applications in science and technology. While 'dynamically unpolarized' single-photon sources are demanded for various quantum applications, such sources have...
10.
Kaneda F, Baek S, Ozawa M, Edamatsu K
Phys Rev Lett
. 2014 Feb;
112(2):020402.
PMID: 24483994
We experimentally test the error-disturbance uncertainty relation (EDR) in generalized, strength-variable measurement of a single photon polarization qubit, making use of weak measurement that keeps the initial signal state practically...