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A photonic millimeter wave local oscillator capable of producing two microwatts of radiated power at 224 GHz has been developed. The device was tested in one antenna of Smithsonian Institution's Submillimeter Array (SMA) and was found to…

Astrophysics · Physics 2009-11-11 Robert Kimberk , Todd R. Hunter , C. -Y. Edward Tong , Raymond Blundell

In this paper, we propose a parallel WaveGAN (PWG)-like neural vocoder with a quasi-periodic (QP) architecture to improve the pitch controllability of PWG. PWG is a compact non-autoregressive (non-AR) speech generation model, whose…

Audio and Speech Processing · Electrical Eng. & Systems 2020-08-10 Yi-Chiao Wu , Tomoki Hayashi , Takuma Okamoto , Hisashi Kawai , Tomoki Toda

We present a mechanism for emission of electromagnetic terahertz waves by simulation. High $T_{c}$ superconductors form naturally stacked Josephson junctions. When an external current and a magnetic field are applied to the sample, fluxon…

Superconductivity · Physics 2009-11-10 Masashi Tachiki , Mikio Iizuka , Kazuo Minami , Syogo Tejima , Hisashi Nakamura

Recently, universal waveform generation tasks have been investigated conditioned on various out-of-distribution scenarios. Although GAN-based methods have shown their strength in fast waveform generation, they are vulnerable to…

Sound · Computer Science 2024-08-15 Sang-Hoon Lee , Ha-Yeong Choi , Seong-Whan Lee

Cold atom interferometers have matured to a powerful tool in fundamental physics research, and they are currently on their way from realizations in the laboratory to applications in the real world. The radio frequency (RF) generator is an…

Wavetable synthesis generates quasi-periodic waveforms of musical tones by interpolating a list of waveforms called wavetable. As generative models that utilize latent representations offer various methods in waveform generation for musical…

Sound · Computer Science 2024-07-30 Hazounne Lee , Kihong Kim , Sungho Lee , Kyogu Lee

Attosecond pulse trains (APTs) are indispensable for probing electron dynamics at their intrinsic timescales. High harmonic generation (HHG) has long been a successful and widely used technique in producing extreme ultraviolet APTs. While…

Accelerator Physics · Physics 2025-10-16 Lanpeng Ni , Junhao Liu , Zheng Qi , Chao Feng

The millimeter wave all-metallic accelerating structure, aimed to provide more than 100 MeV/m gradient and fed by feeding RF pulses of 20-30 ns duration, is proposed. The structure is based on a waveguide with small helical corrugation.…

Accelerator Physics · Physics 2015-11-03 S. V. Kuzikov , A. A. Vikharev , N. Yu. Peskov

Using particle-in-cell simulation technique, we investigate the plasma and ionization asymmetry, electron and ion energy distribution function in capacitive discharges excited by tailored waveforms. At a base frequency of 13.56 MHz, three…

Plasma Physics · Physics 2022-04-27 Sarveshwar Sharma , Nishant Sirse , Animesh Kuley , Miles M Turner

Single flux quantum technology has the potential to enhance readout and control of superconducting quantum systems due to their low energy consumption, high speed, and cryogenic operating temperatures. Current cryogenic readout and control…

Quantum Physics · Physics 2025-05-07 Gregory Cunningham , Yufeng Ye , Kaidong Peng , Alec Yen , Jessica Kedziora , Kevin P. O'Brien

We have developed a digital fast Fourier transform (FFT) spectrometer made of an analog-to-digital converter (ADC) and a field-programmable gate array (FPGA). The base instrument has independent ADC and FPGA modules, which allow us to…

Instrumentation and Methods for Astrophysics · Physics 2017-07-26 Kazumasa Iwai , Yûki Kubo , Hiromitsu Ishibashi , Takahiro Naoi , Kenichi Harada , Kenji Ema , Yoshinori Hayashi , Yuichi Chikahiro

Functionals of the meta-generalized gradient approximation (MGGA) are nowadays widely used in chemistry and solid-state physics for the simulation of electronic systems like molecules, solids, or surfaces. Due to their dependency on the…

Materials Science · Physics 2022-05-31 Jan Doumont , Fabien Tran , Peter Blaha

An algorithm is described that can generate random variants of a time series or image while preserving the probability distribution of original values and the pointwise Holder regularity. Thus, it preserves the multifractal properties of…

Data Analysis, Statistics and Probability · Physics 2017-03-22 Christopher J Keylock

The past few years have seen an increasing focus on energy harvesting issue, including power supply for portable electric devices. Utilize scavenging ambient energy from the environment could eliminate the need for batteries and increase…

Other Computer Science · Computer Science 2008-12-18 Tenghsien Lai , Changhan Huang , Chingfu Tsou

Passive device installation on wind turbine generators (WTGs) can potentially improve the power generation of WTGs. Yet, how much impact the installation will make is unclear because conducting controlled experiments is impossible due to…

Applications · Statistics 2019-06-14 Hoon Hwangbo , Yu Ding , Daniel Cabezon

In this paper, we propose WG-WaveNet, a fast, lightweight, and high-quality waveform generation model. WG-WaveNet is composed of a compact flow-based model and a post-filter. The two components are jointly trained by maximizing the…

Audio and Speech Processing · Electrical Eng. & Systems 2020-08-21 Po-chun Hsu , Hung-yi Lee

Three-wave mixing in second-order nonlinear optical processes cannot occur in atomic systems due to the electric-dipole selection rules. In contrast, we demonstrate that second-order nonlinear processes can occur in a superconducting…

Quantum Physics · Physics 2014-12-23 Yu-xi Liu , Hui-Chen Sun , Z. H. Peng , Adam Miranowicz , J. S. Tsai , Franco Nori

The Murchison Widefield Array (MWA) is a next-generation radio telescope currently under construction in the remote Western Australia Outback. Raw data will be generated continuously at 5GiB/s, grouped into 8s cadences. This high throughput…

Instrumentation and Methods for Astrophysics · Physics 2015-05-18 R. G. Edgar , M. A. Clark , K. Dale , D. A. Mitchell , S. M. Ord , R. B. Wayth , H. Pfister , L. J. Greenhill

Waveform generation is essential for studying signal propagation and channel characteristics, particularly for objects that are conceptualized but still need to be operational. We introduce a comprehensive guide on creating synthetic…

Signal Processing · Electrical Eng. & Systems 2024-01-26 Hongzhao Zheng , Mohamed Atia , Halim Yanikomeroglu , Paulo S. R. Diniz

Wavefront shaping (WFS) has emerged as powerful tool to control the propagation of diverse wave phenomena (light, sound, microwaves, ...) in disordered matter for applications including imaging, communication, energy transfer,…

Applied Physics · Physics 2021-05-14 Philipp del Hougne , K. Brahima Yeo , Philippe Besnier , Matthieu Davy