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Terahertz (THz) communications are regarded as a pillar technology for the 6G systems, by offering multi-ten-GHz bandwidth. To overcome the huge propagation loss while reducing the hardware complexity, THz ultra-massive (UM) MIMO systems…

Information Theory · Computer Science 2022-03-30 Longfei Yan , Chong Han , Nan Yang , Jinhong Yuan

The experimental realization of balanced gain and loss in a quantum system has been a long standing goal in quantum mechanics since the introduction of the concept of $\mathcal{PT}$ symmetry and has only recently been achieved. In this…

Quantum Physics · Physics 2020-01-08 Sinan Altinisik , Daniel Dizdarevic , Jörg Main

Beam quality preservation during transport of high-brightness electron beams is of general concern in the design of modern accelerators. Methods to manage incoherent synchrotron radiation (ISR) have been in place for decades; as beam…

Accelerator Physics · Physics 2014-03-11 D. R. Douglas , S. V. Benson , A. Hutton , G. A. Krafft , R. Li , G. R. Neil , Y. Roblin , C. D. Tennant , C. -Y. Tsai

SHiP (Search for Hidden Particles) is a proposed experiment to be installed at CERN, with the aim of exploring the high intensity beam frontier to investigate the so-called Hidden sector. Since the SPS proton beam interacting with the SHiP…

Instrumentation and Detectors · Physics 2020-04-22 Liliana Congedo

We present a simple technique to reduce the emission rate of higher-order photon events from pulsed spontaneous parametric down-conversion. The technique uses extra-cavity control over a mode locked ultrafast laser to simultaneously…

Quantum Physics · Physics 2012-02-22 Matthew A. Broome , Marcelo P. Almeida , Alessandro Fedrizzi , Andrew G. White

In this work, a new type of high through-put Czerny-Turner spectrometer has been developed which allows to acquire multiple channels simultaneously with a repetition time on the order of \SI{10}{\us} at different wavelengths. The…

Spiking neural networks (SNNs) are the third generation of neural networks and can explore both rate and temporal coding for energy-efficient event-driven computation. However, the decision accuracy of existing SNN designs is contingent…

Neural and Evolutionary Computing · Computer Science 2020-02-25 Changqing Xu , Wenrui Zhang , Yu Liu , Peng Li

Hybrid beamforming for Terahertz (THz) ultra-massive multiple-input multiple-output (UM-MIMO) systems is a promising technology for 6G space-air-ground integrated networks, which can overcome huge propagation loss and offer unprecedented…

Information Theory · Computer Science 2022-02-08 Longfei Yan , Chong Han , Jinhong Yuan

This paper presents a tractable model for analyzing non-coherent joint transmission base station (BS) cooperation, taking into account the irregular BS deployment typically encountered in practice. Besides cellular-network specific aspects…

Information Theory · Computer Science 2014-09-22 Ralph Tanbourgi , Sarabjot Singh , Jeffrey G. Andrews , Friedrich K. Jondral

A method is presented to obtain an inner-approximation of the backward reachable set (BRS) of a given target tube, along with an admissible controller that maintains trajectories inside this tube. The proposed optimization algorithms are…

Systems and Control · Electrical Eng. & Systems 2019-07-09 He Yin , Murat Arcak , Andrew Packard , Peter Seiler

Multicell joint processing can mitigate inter-cell interference and thereby increase the spectral efficiency of cellular systems. Most previous work has assumed phase-aligned (coherent) transmissions from different base transceiver stations…

Information Theory · Computer Science 2016-11-17 Mingguang Xu , Dongning Guo , Michael L. Honig

The progress of a multiple bunches of electrons through several thousand accelerator structures results in a wakefield which if left unchecked will kick successive bunches off the axis of the accelerator and can at the very least dilute the…

Accelerator Physics · Physics 2007-05-23 R. M. Jones , R. H. Miller , J. W Wang

Cell search engineers face significant challenge in reducing computation time to meet the requirements for fast initial access and radio link recovery. Since the majority of cell search time is consumed by Primary Synchronization Signal…

Signal Processing · Electrical Eng. & Systems 2026-04-01 Bitna Kim , Seungyeon Lee , Yelan Lee , Juyeop Kim

Speech enhancement (SE) utilizing diffusion models is a promising technology that improves speech quality in noisy speech data. Furthermore, the Schr\"odinger bridge (SB) has recently been used in diffusion-based SE to improve speech…

We propose a very simple scheme to slow down the usual exponential decay of upper state population in an atomic two level system considerably. The scheme makes use of an additional intense field with frequency lower than the total decay…

Quantum Physics · Physics 2009-11-07 Joerg Evers , Christoph H. Keitel

The Quantum Charge-Coupled Device (QCCD) architecture is a modular design to expand trapped-ion quantum computer that relies on the coherent shuttling of qubits across an array of segmented electrodes. Leveraging trapped ions for their long…

Quantum Physics · Physics 2025-05-05 Chenghong Zhu , Xian Wu , Jingbo Wang , Xin Wang

The current SINR mechanism does not provide the base station (BS) with any knowledge on the frequency selectivity of channel from mobile service station(MSS). This knowledge is important since, contrary to the AWGN channel, in a frequency…

Information Theory · Computer Science 2009-08-11 Shahid Mumtaz , Alitio Gamerio , Rasool Sadeghi

Since proposed, spiking neural networks (SNNs) gain recognition for their high performance, low power consumption and enhanced biological interpretability. However, while bringing these advantages, the binary nature of spikes also leads to…

Neural and Evolutionary Computing · Computer Science 2024-07-09 Yongjun Xiao , Xianlong Tian , Yongqi Ding , Pei He , Mengmeng Jing , Lin Zuo

Probabilistic shaping (PS) has attracted significant attention in intensity-modulation and direct-detection (IM-DD) systems. However, due to the unique system model and inherent constraints, the effective application of the PS technique is…

Signal Processing · Electrical Eng. & Systems 2025-07-25 Dongdong Zou , Wei Wang , Jiawen Yao , Zhongxing Tian , Zeyu Feng , Huan Huang , Fan Li , Gordon Ning Liu , Gangxiang Shen , Yi Cai