Results 81 to 90 of about 103,799 (334)

Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser

Advanced Science, EarlyView.
An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu, Aswathy Sundaresan, Nazire‐Begüm Kazkal, Clement Lafargue, Lior Zarfaty, Li‐Gang Wang, Ofek Birnholtz, Dominique Decanini, Melanie Lebental, Patrick Sebbah   +9 more
wiley   +1 more source

Rapid Prototyping of Field Programmable Gate Array-Based Discrete Cosine Transform Approximations

EURASIP Journal on Advances in Signal Processing, 2003
A method for the rapid design of field programmable gate array (FPGA)-based discrete cosine transform (DCT) approximations is presented that can be used to control the coding gain, mean square error (MSE), quantization noise, hardware cost, and power ...
Trevor W. Fox, Laurence E. Turner
doaj   +1 more source

Direct Photocurrent Detection of Optical Vortex Based on the Orbital Photo Galvanic Effect: Progress, Challenge, and Perspective

Advanced Science, EarlyView.
Direct orbital angular momentum (OAM) detection through the orbital photogalvanic effect offers a scalable route for integrated optoelectronics. This perspective evaluates symmetry‐driven material selection and demonstrates how electrode matrices enable the resolution of complex, mixed OAM modes.
Jinluo Cheng, Dehong Yang, Weiming Wang, Chang Xu, Zipu Fan, Dong Sun   +5 more
wiley   +1 more source

Quantization for Low-Rank Matrix Recovery

, 2018
We study Sigma-Delta quantization methods coupled with appropriate reconstruction algorithms for digitizing randomly sampled low-rank matrices. We show that the reconstruction error associated with our methods decays polynomially with the oversampling ...
Lybrand, Eric, Saab, Rayan
core   +1 more source

Enhancement of Calcium Ion Permeation via Resonant Coupling of Ion and Terahertz Waves in Voltage Gated Calcium Channels

Advanced Science, EarlyView.
We introduce a novel, ion‐targeted strategy to enhance calcium permeation in voltage gated calcium channels. By directly driving the ions’ coherent collective motion via resonant coupling with a 1.65 THz field, we lower the inter‐site energy barrier, inducing a statistically significant enhancement of ion influx.
Zihao Zhang, Yuankun Sun, Xinqiao Zhou, Sunchao Huang, Shengpeng Yang, Shaomeng Wang, Yubin Gong   +6 more
wiley   +1 more source

Spin Hall Nano‐Antenna

Advanced Science, EarlyView.
ABSTRACT The spin Hall effect is a well‐known phenomenon in spintronics that has found numerous applications in digital electronics (memory and logic), but relatively few in analog electronics. Practically the only analog application in widespread use is the spin Hall nano‐oscillator (SHNO) that delivers a high frequency alternating current or voltage ...
Raisa Fabiha, Pratap Kumar Pal, Michael Suche, Amrit Kumar Mondal, Erdem Topsakal, Anjan Barman, Supriyo Bandyopadhyay   +6 more
wiley   +1 more source

A Control Structure for Unilateral System with Communication Rate Constraint

SICE Journal of Control, Measurement, and System Integration, 2018
This study proposes a design method for unilateral control systems with communication rate constraints. In the case where it is necessary to control under a communication rate constraint, the effect of the quantization noise should be minimized using ...
Hiroshi Okajima, Yuki Minami, Nobutomo Matsunaga   +2 more
doaj   +1 more source

Signal Processing of Coast-Ship Bistatic High-Frequency Surface-Wave Radar Using One-Bit Quantized Measurement

IEEE Access, 2020
The feasibility of one-bit quantization in coast-ship bistatic high-frequency surface-wave radar (HFSWR) is mainly discussed in order to enjoy the advantages of simplicity, low cost and low power consumption.
Bingfan Liu, Baixiao Chen, Minglei Yang
doaj   +1 more source

Shot Noise in Nanoscale Conductors From First Principles

, 2005
We describe a field-theoretic approach to calculate quantum shot noise in nanoscale conductors from first principles. Our starting point is the second-quantization field operator to calculate shot noise in terms of single quasi-particle wavefunctions ...
A.H. Steinbach, C.W.J. Beenakker, D.M. Ceperley, E.G. Mishchenko, E.V. Sukhorukov, E.V. Sukhorukov, G. Iannaccone, G.B. Levovik, J.P. Perdew, K.E. Nagaev, K.E. Nagaev, L.Y. Chen, M. Büttiker, M. Büttiker, M. Di Ventra, M. Di Ventra, M. Di Ventra, M. Di Ventra, M. Di Ventra, M. Di Ventra, M. Di Ventra, M. Di Ventra, Massimiliano Di Ventra, N.D. Lang, N.D. Lang, O.M. Bulashenko, O.M. Bullashenko, P. Hohenberg, R. Landauer, R.C. Liu, Scherbakov, T. González, T.-S. Kim, Th. Martin, W. Kohn, W. Schottky, Y. Wei, Ya.M. Blanter, Yu-Chang Chen, Z. Yang   +39 more
core   +1 more source

Spintronic Bayesian Hardware Driven by Stochastic Magnetic Domain Wall Dynamics

Advanced Science, EarlyView.
Magnetic Probabilistic Computing (MPC) utilizes intrinsic stochastic dynamics in domain walls to establish a hardware foundation for uncertainty‐aware artificial intelligence. Thermally driven domain‐wall fluctuations, voltage‐controlled magnetic anisotropy, and TMR readout enable fully electrical, tunable probabilistic inference.
Tianyi Wang, Bingqian Dai, Shijie Xu, Kin Wong, Yaochen Li, Yang Cheng, Qingyuan Shu, Haoran He, Puyang Huang, Hanshen Huang, Xixiang Zhang, Kang L. Wang   +11 more
wiley   +1 more source