Article
Materials Science, Multidisciplinary
Yu-Chen Zhang, Zhi-Yuan Yu, Feng-Yang Ma, Xia-Yan Xue, Kai-Xin Liu, Jian Sun, Song-You Wang, Ming Lu
Summary: Electrically pumped distributed feedback (DFB) lasing has been observed in silicon nanocrystals (SiNCs). By incorporating a second-order DFB grating into a SiNC light-emitting diode (LED), visible light emission was achieved. The study found significant optical gains in the light emitting regime. The DFB SiNC laser was pumped by a pulsed direct-current power supply, and four typical criteria of lasing were identified.
RESULTS IN PHYSICS
(2022)
Article
Mathematics, Applied
Vladimir V. Semenov, Anna Zakharova
Summary: This paper explores the control effect of multiplexing on noise-induced dynamics of multilayer networks in the regime of stochastic resonance, revealing that multiplexing can suppress or enhance stochastic resonance effects and exhibit resonant characteristics. With an increasing number of coupled layers, the impact of stochastic resonance becomes more pronounced.
Article
Multidisciplinary Sciences
Po-Yu Hong, Chi-Cheng Lai, Ting Tsai, Horng-Chih Lin, Thomas George, David M. T. Kuo, Pei-Wen Li
Summary: This study reported exciton binding-energy determination using tunneling-current spectroscopy of Germanium quantum dot single-hole transistors. The experimental results showed that under specific wavelengths, the tunneling current spectra exhibited significant changes in peak voltages and the emergence of new photocurrent peaks, revealing the presence of exciton binding energy.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Chemical
Ren Han, Yuyun Xin, Zhi Wang, Ran Li, Hui Yang, Quan Chen
Summary: This study applies numerical simulation to investigate the particle velocity and coordination number in a rotating drum under the slumping regime. It is found that the distribution of coordination numbers is the main factor causing uneven avalanches, and a mathematical model for calculating the kinetic energy of the particle system is established. Additionally, the maximum kinetic energy of particles in different regions during uneven avalanches is positively correlated with the avalanche duration, providing valuable reference data for improving control technology and heat transfer in industrial particle material flow.
Article
Chemistry, Multidisciplinary
Farshad Serat Nahaei, Ali Rostami, Peyman Mirtaheri
Summary: A comprehensive study has been conducted comparing quantum dot reflective semiconductor optical amplifiers (QD-RSOAs) with optical pumps (OPs) and electrical pumps (EPs). It is found that the OP version of the device has better dynamic properties. The operation of the device in pulse mode is investigated by solving the coupled differential rate and signal propagation equations. The results demonstrate that OP QD-RSOAs can significantly outperform EP QD-RSOAs in applications such as fast all-optical signal processing and wavelength division multiplexing in passive optical networks.
Article
Biotechnology & Applied Microbiology
Jeremie Breda, Mihaela Zavolan, Erik van Nimwegen
Summary: A Bayesian normalization procedure called Sanity is introduced in this study to address challenges in single-cell RNA-seq data normalization. The method outperforms other normalization methods in downstream tasks and effectively corrects for sampling noise and expression variability in the data.
NATURE BIOTECHNOLOGY
(2021)
Article
Optics
Le He, Qiang Qiu, Xiaoke Yin, Zhimu Gu, Shaokun Liu, Wenzhen LI, Yingbin Xing, Yingbo Chu, Nengli Dai, Jinyan LI
Summary: The extended L-band 4-core Er/Yb co-doped fiber and amplifier (MC-EYDFA) is proposed and demonstrated for space division multiplexing combined with wavelength division multiplexing application for the first time. The bandwidth expansion is achieved by co-doping the fiber core with Er/Yb/P, extending the long wavelength to 1625 nm. Numerical simulations show efficient amplification and higher saturation power with 1018 nm cladding pumping. Experimental results of the integrated 4-core fiber amplifier show an average gain of approximately 22 dB covering 1575-1625 nm with a 4 W pump power and a 3 dBm total signal power, and a maximum core-dependent gain (CDG) variation of 1.7 dB.
Article
Physics, Applied
B. Guo, A. H. Jones, S. Lee, S. H. Kodati, B. Liang, X. Xue, N. A. Pfiester, M. Schwartz, M. Winslow, C. H. Grein, T. J. Ronningen, S. Krishna, J. C. Campbell
Summary: The study investigates the low excess noise characteristics of digital alloy and random alloy avalanche photodiodes under 543-nm laser illumination, and analyzes their optical properties. The calculated external quantum efficiency agrees well with the measured values.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Michael Kufner, Josef Kolbl, Raphael Lukas, Thomas Dekorsy
Summary: This paper discusses the integration of an InGaAs avalanche photo diode with the first amplification stage, improvement in SNR and immunity to EMI, and the demonstration of accuracy and range in a safe mobile laser range finding system using this hybrid detector.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Multidisciplinary
Irma Uriarte, Daniela M. Martinez, Angel G. Andrade, Guillermo Galaviz, Norma A. Barboza
Summary: Spectrum sensing is the identification of unused license bands in Cognitive Radio Networks. Energy Detection (ED) is the most studied form of spectrum sensing, but its performance is significantly degraded by noise uncertainty. To enhance the robustness of ED in noise uncertainty scenarios, this study proposes the use of an adaptive detection threshold, calculated from the noise power estimate obtained at each sensing interval. The noise power estimate is obtained using the Spectral Minima Tracking (SMT) technique, and a correlation analysis is conducted to optimize the parameters of the SMT technique and improve the quality of the noise power estimate.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Malgorzata Kopytko, Jan Sobieski, Waldemar Gawron, Piotr Martyniuk
Summary: Recently, there has been a trend in infrared technology towards achieving high operating temperature conditions for thermoelectric coolers. This is because there is a need to reduce the size, weight, and power dissipation of IR detectors. The paper discusses the potential application of specific materials and cooling techniques for the design of avalanche photodiodes operating in the infrared range, and compares the performance of different materials for this purpose.
Article
Physics, Multidisciplinary
Miroslav Urbanek, Benjamin Nachman, Vincent R. Pascuzzi, Andre He, Christian W. Bauer, Wibe A. de Jong
Summary: The study presents a method to mitigate noise in quantum computers by estimating and correcting the depolarizing noise rate, experimentally validated on a simulation of the Heisenberg model. The approach, combined with readout-error correction, randomized compiling, and zero-noise extrapolation, produces close to exact results even for circuits containing hundreds of CNOT gates, with analytical improvement shown when zero-noise extrapolation is applied to the output of the method.
PHYSICAL REVIEW LETTERS
(2021)
Article
Energy & Fuels
Shrabani Mondal, Santanu Koley
Summary: This study examines the impact of multiplicative Gaussian noise on the conversion of vibration energy into electrical energy. The results show that a close tracking of the oscillator's amplitude by the voltage leads to efficient energy conversion. The power of micro-electromechanical systems (MEMS) reaches a maximum when the noise correlation time is inversely related to it.
Article
Chemistry, Physical
Hong Wang, Tao Pang, Ying Tian, Xiumei Yin, Ke Cai, Meng Tian, Wei He, Mingming Xing, Yao Fu, Xixian Luo
Summary: The study found that the high-frequency vibration modes of organic compounds affect the luminescence properties of beta-NaYF4:Er3+ under 1.5 μm excitation mainly due to excitation energy attenuation induced by molecules. After considering to avoid this quenching pathway, ligand-free NaYF4:Er@ NaYF4 UCNPs exhibited satisfactory brightness upon 1.5 μm excitation and could be used for anti-counterfeiting labels.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Liqi Zhu, Huachen Ge, Huijun Guo, Lu Chen, Chun Lin, Baile Chen
Summary: This study discusses the gain and excess noise properties of multiple Hg1-xCdxTe electron-initialed APDs at different temperatures. It is found that the gain of APDs increases as the temperature decreases and the cutoff wavelength increases, which is related to the decrease of electron effective mass, optical photon scattering rate, and bandgap of the materials. In addition, these devices achieve low excess noise of less than 1.6 over a wide range of temperatures. The observed pure electron avalanche and exceptionally low excess noise are attributed to the large spin-orbit splitting energy (Delta so) in comparison to bandgap energy. This research has important implications for future applications of high-temperature operating and high-performance optical receivers.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Physics, Mathematical
Kiyoshi Kanazawa, Tomohiko G. Sano, Takahiro Sagawa, Hisao Hayakawa
JOURNAL OF STATISTICAL PHYSICS
(2015)
Article
Physics, Multidisciplinary
Kiyoshi Kanazawa, Tomohiko G. Sano, Takahiro Sagawa, Hisao Hayakawa
PHYSICAL REVIEW LETTERS
(2015)
Article
Physics, Multidisciplinary
J. -F. Boilard, K. Kanazawa, H. Takayasu, M. Takayasu
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2018)
Article
Physics, Multidisciplinary
Kiyoshi Kanazawa, Takumi Sueshige, Hideki Takayasu, Misako Takayasu
PHYSICAL REVIEW LETTERS
(2018)
Article
Multidisciplinary Sciences
Kiyoshi Kanazawa, Tomohiko G. Sano, Andrea Cairoli, Adrian Baule
Article
Physics, Multidisciplinary
Kiyoshi Kanazawa, Didier Sornette
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Kiyoshi Kanazawa, Didier Sornette
Summary: The research combines the origin of probability distribution functions with power law tails, introducing a novel class of nonlinear self-excited point processes and revealing a new mechanism for power laws, including Zipf's law, providing a new understanding of their ubiquity.
PHYSICAL REVIEW LETTERS
(2021)
Review
Physics, Multidisciplinary
Marko Jusup, Petter Holme, Kiyoshi Kanazawa, Misako Takayasu, Ivan Romic, Zhen Wang, Suncana Gecek, Tomislav Lipic, Boris Podobnik, Lin Wang, Wei Luo, Tin Klanjscek, Jingfang Fan, Stefano Boccaletti, Matjaz Perc
Summary: In recent years, physics methods have been widely used to study societal phenomena. Social physics examines topics at the core of modern human societies and explores potential threats to society. The future of this field looks promising, with physicists playing an important role in studying social phenomena.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2022)
Article
Physics, Mathematical
Kiyoshi Kanazawa, Hideki Takayasu, Misako Takayasu
Summary: In this paper, the two-body stochastic dealer model is revisited to provide an exact solution to the average order-book profile. The authors derive the exact master-Liouville equations for the model and solve them to obtain the order-book profile and average transaction interval. They also introduce a generalized two-body dealer model and solve it within the kinetic framework. Numerical simulations confirm the exact solutions. This work provides a systematic mathematical basis for the econophysics model.
JOURNAL OF STATISTICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Kiyoshi Kanazawa, Didier Sornette
Summary: The linear Hawkes point process is a stochastic model for intermittent bursty dynamics. Nonlinear Hawkes processes, which are expected to better describe the coexistence of excitatory and inhibitory effects, have been found to be analytically intractable due to their non-Markovian and nonlinear characteristics. This study classifies the solutions of nonlinear Hawkes processes and presents exact/asymptotic solutions using a field master equation approach. The findings provide analytical tools for advanced Hawkes modeling and model calibration in complex systems.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Physics, Multidisciplinary
Kiyoshi Kanazawa, Didier Sornette
PHYSICAL REVIEW RESEARCH
(2020)
Article
Multidisciplinary Sciences
Takumi Sueshige, Kiyoshi Kanazawa, Hideki Takayasu, Misako Takayasu
Article
Physics, Fluids & Plasmas
Tomohiko G. Sano, Kiyoshi Kanazawa, Hisao Hayakawa
Article
Physics, Fluids & Plasmas
Kiyoshi Kanazawa, Takumi Sueshige, Hideki Takayasu, Misako Takayasu
