Frequency-Stable Robust Wireless Power Transfer Based on High-Order Pseudo-Hermitian Physics

Article Engineering, Electrical & Electronic

Wireless Power Transfer System With High-Order Compensation Network Based on Parity-Time-Symmetric Principle and Relay Coil

Yuhu Qu et al.

Summary: The PT symmetric principle can improve the freedom of wireless power transfer system. This article presents a novel three-coil WPT system with S/S/PS compensation network to expand the PT symmetric region and increase the output power.

IEEE TRANSACTIONS ON POWER ELECTRONICS (2023)

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Review Physics, Multidisciplinary

Efficient and stable wireless power transfer based on the non-Hermitian physics

Chao Zeng et al.

Summary: This article reviews the recently developed efficient and stable resonance wireless power transfer (WPT) based on non-Hermitian physics, and introduces some optimization schemes and potential applications of this technology.

CHINESE PHYSICS B (2022)

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Article Physics, Multidisciplinary

Observation of Transient Parity-Time Symmetry in Electronic Systems

Xin Yang et al.

Summary: The transient parity-time (PT) symmetry in electronics is demonstrated in this study. By equivalent circuit transformation according to the switching states of electronic systems, the PT symmetry is revealed. Using the phasor method and Laplace transformation, the hidden PT-symmetric Hamiltonian in the switching oscillation is derived, which is characterized by free oscillation modes. The spectral and dynamic properties of the PT electronic structure demonstrate the phase transition and eigenmode orthogonality. Importantly, the observed transient PT symmetry enables optimal switching oscillation suppression induced by exceptional points, showing the significance of PT symmetry in electronic systems with temporary responses. The study paves the way for breakthroughs in PT symmetry theory and has essential applications such as anti-interference in switch-mode electronics.

PHYSICAL REVIEW LETTERS (2022)

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Article Physics, Applied

Wireless real-time capacitance readout based on perturbed nonlinear parity-time symmetry

Ke Yin et al.

Summary: In this article, a vector-network-analyzer-free and real-time LC wireless capacitance readout system based on perturbed nonlinear parity-time (PT) symmetry is reported. The system can operate in different modes by setting different perturbation points, and exhibits high sensitivity at the exceptional point of PT symmetry. Experimental demonstrations show the feasibility of the proposed readout mechanism, which could impact applications such as health monitoring, parameter detection in harsh environments, and food packaging.

APPLIED PHYSICS LETTERS (2022)

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Article Physics, Multidisciplinary

Quantum Squeezing and Sensing with Pseudo-Anti-Parity-Time Symmetry

Xi-Wang Luo et al.

Summary: This research establishes a quantum pseudo-anti-PT (pseudo-APT) symmetry which, when spontaneously broken, leads to the generation of an exceptional point that can be utilized for ultraprecision quantum sensing applications.

PHYSICAL REVIEW LETTERS (2022)

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Article Nanoscience & Nanotechnology

Visualization of synchronization zone on the Bloch sphere through an anti-PT-symmetric electrical circuit

M. Kim et al.

Summary: This work presents an analysis of an anti-parity-time (APT) symmetry system generated by dissipative coupled electric oscillators. The complex eigenfrequencies of the APT-symmetric system were measured using spectral and time-domain measurements. Interesting physics phenomena, including exceptional points, APT-symmetry breaking transitions, and frequency synchronization with defined phase differences, were observed. Importantly, synchronous signals were found to span the equator of the Bloch sphere, demonstrating the potential of this methodology in exploring APT-symmetric systems.

AIP ADVANCES (2022)

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Article Multidisciplinary Sciences

Anyonic-parity-time symmetry in complex-coupled lasers

Geva Arwas et al.

Summary: Non-Hermitian Hamiltonians, such as parity-time (PT) and anti-PT symmetric Hamiltonians, have significant implications in various branches of physics. In this study, we investigate these novel symmetries theoretically and demonstrate them experimentally in coupled laser systems. We also discover a new relation between laser synchronization and the symmetry of the underlying non-Hermitian Hamiltonian.

SCIENCE ADVANCES (2022)

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Article Automation & Control Systems

Position-Independent Constant Current or Constant Voltage Wireless Electric Vehicles Charging System Without Dual-Side Communication and DC-DC Converter

Lihao Wu et al.

Summary: In this article, a robust wireless power transfer system is proposed for charging electric vehicles, considering variations in load resistance and coupling coefficient. By using a phase synchronization method and a parity-time (PT)-symmetric circuit, constant current and constant voltage outputs can be achieved, and the charging mode can be switched automatically. Experimental results confirm the feasibility of the proposed method, showing that constant current and constant voltage outputs can be maintained within a certain transfer distance.

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS (2022)

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Article Engineering, Electrical & Electronic

Pulse Frequency Modulation for Parity-Time-Symmetric Wireless Power Transfer System

Zhichao Hua et al.

Summary: This article proposes and implements an advanced pulse frequency modulation scheme to adjust the output power of the wireless power transfer system. The scheme improves the efficiency of energy transfer and reduces switching loss.

IEEE TRANSACTIONS ON MAGNETICS (2022)

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Article Multidisciplinary Sciences

Wide-range robust wireless power transfer using heterogeneously coupled and flippable neutrals in parity-time symmetry

Hyunwoo Kim et al.

Summary: A WPT system with laterally aligned neutral elements in parity-time symmetry is proposed, which can widen the operational area. Compared to traditional methods, this system reduces complexity and achieves high voltage gain and efficiency.

SCIENCE ADVANCES (2022)

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Article Materials Science, Multidisciplinary

Pseudo-Hermitian magnon-polariton system with a three-dimensional exceptional surface

Vahram L. Grigoryan et al.

Summary: This study introduces a non-Hermitian platform that allows for the formation of a three-dimensional exceptional surface with a two-tone driving system, showing significant implications in cavity spintronics.

PHYSICAL REVIEW B (2022)

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Review Engineering, Electrical & Electronic

Wireless power transfer based on novel physical concepts

Mingzhao Song et al.

Summary: This article reviews the development of new physical effects and materials for wireless power transfer, including various new technologies such as coherent perfect absorption, parity-time symmetry and exceptional points, on-site power generation, metamaterials and metasurfaces, and acoustic power transfer.

NATURE ELECTRONICS (2021)

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Article Optics

Higher-order exceptional point in a pseudo-Hermitian cavity optomechanical system

Wei Xiong et al.

Summary: The study proposes a benchmark cavity optomechanical system for predicting third-order exceptional points and discusses the characteristics of different cavity systems in symmetric and asymmetric cases. Their proposal provides a potential way to realize sensitive detection and study other physical phenomena around higher-order exceptional points in non-Hermitian COM systems.

PHYSICAL REVIEW A (2021)

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Article Engineering, Electrical & Electronic

Ultrarobust Wireless Interrogation for Sensors and Transducers: A Non-Hermitian Telemetry Technique

Minye Yang et al.

Summary: The non-Hermitian parity-time (PT)-symmetric telemetry platform can robustly acquire sensor data with high sensitivity and resolution. It can wirelessly query the effective resistance or capacitance of the sensors, and the measurement results are robust to variations in inductive coupling strength.

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT (2021)

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Article Physics, Applied