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Holographic multiple-input multiple-output (MIMO) communications are widely recognized as a promising candidate for the next-generation air interface. With holographic MIMO surface, the number of the spatial degrees-of-freedom (DoFs)…

Information Theory · Computer Science 2023-09-25 Shuaishuai Guo , Jia Ye , Kaiqian Qu , Shuping Dang

Hybrid beamforming (HBF) is a key enabler for wideband terahertz (THz) massive multiple-input multiple-output (mMIMO) communications systems. A core challenge with designing HBF systems stems from the fact their application often involves a…

Information Theory · Computer Science 2023-02-24 Nhan Thanh Nguyen , Mengyuan Ma , Nir Shlezinger , Yonina C. Eldar , A. L. Swindlehurst , Markku Juntti

Quantum Frequency Conversion (QFC) is a widely used technique to interface atomic systems with the telecom band in order to facilitate propagation over longer distances in fiber. Here we demonstrate the difference-frequency conversion from…

Quantum Physics · Physics 2025-02-25 Soeren Wengerowsky , Stefano Duranti , Lukas Heller , Hugues de Riedmatten

Quantum repeaters, which are indispensable for long-distance quantum communication, are necessary for extending the entanglement from short distance to long distance; however, high-rate entanglement distribution, even between adjacent…

Quantum Physics · Physics 2021-07-26 Daisuke Yoshida , Kazuya Niizeki , Shuhei Tamura , Tomoyuki Horikiri

The transition to the fault-tolerant era exposes the limitations of homogeneous quantum systems, where no single qubit modality simultaneously offers optimal operation speed, connectivity, and scalability. In this work, we propose a…

Quantum Physics · Physics 2026-01-16 Xiang Fang , Jixuan Ruan , Sharanya Prabhu , Ang Li , Travis Humble , Dean Tullsen , Yufei Ding

High-coherence, fault-tolerant and scalable quantum computing architectures with unprecedented long coherence times, faster gates, low losses and low bit-flip errors may be one of the only ways forward to achieve the true quantum advantage.…

Quantum Physics · Physics 2026-05-14 Masroor H. S. Bukhari

Compress-forward (CF) relays can improve communication rates even when the relay cannot decode the source signal. Efficient implementation of CF is a topic of contemporary interest, in part because of its potential impact on wireless…

Information Theory · Computer Science 2023-01-10 Heping Wan , Anders Host-Madsen , Aria Nosratinia

Quantum repeaters have long been established to be essential for distributing entanglement over long distances. Consequently, their experimental realization constitutes a core challenge of quantum communication. However, there are numerous…

Quantum Physics · Physics 2024-04-04 Julius Wallnöfer , Frederik Hahn , Fabian Wiesner , Nathan Walk , Jens Eisert

Traditional joint source-channel coding employs static learned semantic representations that cannot dynamically adapt to evolving source distributions. Shared semantic memories between transmitter and receiver can potentially enable…

Signal Processing · Electrical Eng. & Systems 2025-11-14 Karim Nasreddine , Christo Kurisummoottil Thomas , Walid Saad

Quantum information degrades over distance due to the unavoidable imperfections of the transmission channels, with loss as the leading factor. This simple fact hinders quantum communication, as it relies on propagating quantum systems. A…

Quantum Physics · Physics 2018-06-29 Filippo M. Miatto , Michael Epping , Norbert Lutkenhaus

Hollow-core anti-resonant fibers (HC-ARFs) have proven to be an indispensable platform for various emerging applications due to their unique and extraordinary optical properties. However, accurately estimating the propagation loss of nested…

Full-duplex (FD) communication is regarded as a key technology in future 5G and Internet of Things (IoT) systems. In addition to high data rate constraints, the success of these systems depends on the ability to allow for confidentiality…

Information Theory · Computer Science 2016-01-21 Hendrik Vogt , Zohaib Hassan Awan , Aydin Sezgin

Advancements in quantum communication and sensing require improved optical transmission that ensures excellent state purity and reduced losses. While free-space optical communication is often preferred, its use becomes challenging over long…

One of the most sought-after goals in experimental quantum communication is the implementation of a quantum repeater. The performance of quantum repeaters can be assessed by comparing the attained rate with the quantum and private capacity…

Quantum Physics · Physics 2016-06-27 Kenneth Goodenough , David Elkouss , Stephanie Wehner

Full-duplex (FD) communications with bidirectional transmitting and receiving at the same time and frequency radio resource have long been deemed a promising way to boost spectrum efficiency, but hindered by the techniques for…

Information Theory · Computer Science 2016-04-12 Rongpeng Li , Yan Chen , Geoffrey Ye Li , Guangyi Liu

Hybrid beamforming (HBF) is an attractive technology for practical massive multiple-input and multiple-output (MIMO) millimeter wave (mmWave) systems. Compared with the fully-connected HBF architecture, the partially-connected one can…

Information Theory · Computer Science 2020-10-12 Xingyu Zhao , Tian Lin , Yu Zhu , Jun Zhang

Two-way relaying can considerably improve spectral efficiency in relay-assisted bidirectional communications. However, the benefits and flexible structure of orthogonal frequency division multiplexing (OFDM)-based two-way decode-and-forward…

Information Theory · Computer Science 2013-01-28 Yuan Liu , Jianhua Mo , Meixia Tao

The multi-user Holographic Multiple-Input and Multiple-Output Surface (MU-HMIMOS) paradigm, which is capable of realizing large continuous apertures with minimal power consumption, has been recently considered as an energyefficient solution…

Information Theory · Computer Science 2022-09-14 Li Wei , Chongwen Huang , George C. Alexandropoulos , Wei E. I. Sha , Zhaoyang Zhang , Merouane Debbah , Chau Yuen

In this paper we develop a low-complexity coding scheme and system design framework for the half duplex relay channel based on the Quantize-Map-and-Forward (QMF) relay- ing scheme. The proposed framework allows linear complexity operations…

Information Theory · Computer Science 2012-10-26 Vinayak Nagpal , I-Hsiang Wang , Milos Jorgovanovic , David Tse , Borivoje Nikolic

Programmable optical devices provide performance enhancement and flexibility to spatial multiplexing systems enabling transmission of tributaries in high-order eigenmodes of spatially-diverse transmission media, like multimode fiber (MMF).…

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