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We consider quantum many body systems as quantum channels and study the relation between the transfer quality and the size of the spectral gap between the system's ground and excited states. In our setup two ancillas are weakly coupled to…

量子物理 · 物理学 2009-11-11 Michael J. Hartmann , Moritz E. Reuter , Martin B. Plenio

Conventional wireless power transfer systems consist of a microwave power generator and transmitter located at one place and a microwave power receiver located at a distance. Here we show that wireless power transfer can be realized as a…

State of the Art Wireless Power Transfer (WPT) systems, based on conventional copper coils, are known to exhibit efficiencies well above 90% when operated in the resonantly coupled mid-range regime. Besides full system efficiency, the area-…

应用物理 · 物理学 2021-02-01 Christoph Utschick , Cem Som , Ján Šouc , Veit Große , Fedor Gömöry , Rudolf Gross

The distribution of electric current on an electrode surface in electrolyte varies with time due to charge accumulation at a capacitive interface, as well as due to electrode kinetics and concentration polarization in the medium. Initially,…

应用物理 · 物理学 2020-01-08 Zhijie Chen , Lenya Ryzhik , Daniel Palanker

The coherent energy transfer between two quantum devices (a quantum charger and a quantum battery) mediated by a photonic cavity is investigated, in presence of dissipative environments, with particular focus on the the ultrastrong coupling…

量子物理 · 物理学 2024-05-09 Alba Crescente , Dario Ferraro , Maura Sassetti

As wireless power transfer (WPT) repeaters, metasurfaces can enhance field coupling, improving the WPT operation. In this paper, we show that metasurfaces can also be used as transmitters of capacitive WPT systems. Such a metasurface-based…

应用物理 · 物理学 2019-10-07 Fu Liu , Prasad Jayathurathnage , Sergei A. Tretyakov

Unified Power Flow Controller (UPFC) is recognized as the most powerful flexible AC transmission systems (FACTS) device for power system operation. This paper addresses how UPFC explores the transmission flexibility and facilitates the…

最优化与控制 · 数学 2017-10-02 Jia Li , Feng Liu , Zuyi Li , Shengwei Mei , Guangyu He

The energy transition is also about switching to electricity-based technologies such as heat pumps and electric mobility. They avoid heat as an intermediate step and are therefore much more efficient. This can significantly reduce the…

科普物理 · 物理学 2025-06-17 Axel Kleidon , Harald Lesch

In Wireless Local Area Networks (WLANs), Access point (AP) transmit power influences (i) received signal quality for users and thus user throughput, (ii) user association and thus load across APs and (iii) AP coverage ranges and thus…

网络与互联网体系结构 · 计算机科学 2023-02-22 Jonatan Krolikowski , Zied Ben Houidi , Dario Rossi

This paper investigates the average throughput of a wireless powered communications system, where an energy constrained source, powered by a dedicated power beacon (PB), communicates with a destination. It is assumed that the PB is capable…

信息论 · 计算机科学 2016-11-18 Caijun Zhong , Xiaoming Chen , Zhaoyang Zhang , George Karagiannidis

Understanding inter-site mutual mode interaction in coupled physical systems is essential to comprehend large compound systems as this local interaction determines the successive multiple inter-site energy transfer efficiency. We…

RF Wireless Power Transfer (WPT) emerges as a technology for charging autonomous devices, enabling simultaneous power and information transfer. However, with increasing distance, single-input, single-channel rectenna systems are not able to…

系统与控制 · 电气工程与系统科学 2021-12-17 Chesney Buyle , Bert Cox , Liesbet Van der Perre , Lieven De Strycker

Wireless power transfer (WPT) using energy beamforming is a promising solution for low power Internet of Things (IoT) devices. In this work, we consider WPT from an energy transmitter (ET) employing retrodirective WPT using a large phased…

信息论 · 计算机科学 2021-04-23 Sahar Idrees , Xiangyun Zhou , Salman Durrani , Dusit Niyato

We develop a theory for heat transport via electromagnetic waves inside media, and use it to derive a spatially nonlocal thermal conductivity tensor, in terms of the electromagnetic Green's function and potential, for any given system.…

经典物理 · 物理学 2024-02-21 Matthias Krüger , Kiryl Asheichyk , Mehran Kardar , Ramin Golestanian

We present the differences between Input-Output formalism (IOF) and Incoherent Pumping Mechanism (IPM) derived from Lindblad Master Equation approach in terms of the transmission spectrum of Coupled high-Q Cavity with Quantum Dot system in…

量子物理 · 物理学 2017-12-12 A. Tugen , S. Kocaman

Output impedances are inherent elements of power sources in the electrical grids. In this paper, we give an answer to the following question: What is the effect of output impedances on the inductivity of the power network? To address this…

系统与控制 · 计算机科学 2018-11-05 Pooya Monshizadeh , Nima Monshizadeh , Claudio De Persis , Arjan van der Schaft

This paper theoretically and experimentally investigates frequency-tuned and impedance-tuned wireless non-radiative power transfer (WNPT) systems. Closed-form expressions for the efficiencies of both systems, as a function of frequency and…

其他计算机科学 · 计算机科学 2015-01-23 Jason D. Heebl , Erin M. Thomas , Robert P. Penno , Anthony Grbic

Optical absorption is omnipresent and very often distributed non-uniformly in space. We present a numerical study on the effects of inhomogeneous absorption on transmission eigenchannels of light in highly scattering media. In the weak…

光学 · 物理学 2016-02-18 Seng Fatt Liew , Hui Cao

This paper presents a novel concept termed Integrated Imaging and Wireless Power Transfer (IWPT), wherein the integration of imaging and wireless power transfer functionalities is achieved on a unified hardware platform. IWPT leverages a…

信号处理 · 电气工程与系统科学 2024-08-02 Qianyu Yang , Haiyang Zhang , Chunguo Li , Ruiqi Liu , Baoyun Wang

By making use of the Green function concept of quantization of the electromagnetic field in Kramers--Kronig consistent media, a rigorous quantum mechanical derivation of the rate of intermolecular energy transfer in the presence of…

量子物理 · 物理学 2016-08-16 Ho Trung Dung , Ludwig Knöll , Dirk-Gunnar Welsch