Unconventional Singularity in Anti-Parity-Time Symmetric Cavity Magnonics

Yang, Yidong; Wang, Yipu; Rao, J. W.; Gui, Y. S.; Yao, Bing; Lü, Wei; Hu, C.‐M.

doi:10.1103/physrevlett.125.147202

Cited by 130 publications

(78 citation statements)

References 66 publications

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“…Interestingly, anti-PTsymmetry [188][189][190][191] -the counterpart of PT symmetry-has also been demonstrated in hybrid magnonics. 192,193 In these demonstrations, purely imaginary coupling between two interacting modes can be obtained through dissipative coupling, resulting in properties that are conjugate to PT-symmetric systems. In anti-PT-symmetric hybrid magnonic systems, EPs are also observed at the transition from the anti-PT-symmetric phase to the anti-PT-symmetry-broken phase.…”

Section: E Non-hermitian Physics and Exceptional Pointsmentioning

confidence: 99%

“…In anti-PT-symmetric hybrid magnonic systems, EPs are also observed at the transition from the anti-PT-symmetric phase to the anti-PT-symmetry-broken phase. In addition, such systems allow the observation of other intriguing phenomena such as bound-state-in-continuum (BIC), 192 where the hybrid modes exhibits maximal coherence as well as slow light capability.…”

Section: E Non-hermitian Physics and Exceptional Pointsmentioning

confidence: 99%

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Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Awschalom

et al. 2021

IEEE Trans. Quantum Eng.

105

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Quantum technology has made tremendous strides over the past two decades with remarkable advances in materials engineering, circuit design and dynamic operation. In particular, the integration of different quantum modules has benefited from hybrid quantum systems, which provide an important pathway for harnessing the different natural advantages of complementary quantum systems and for engineering new functionalities. This review focuses on the current frontiers with respect to utilizing magnetic excitatons or magnons for novel quantum functionality. Magnons are the fundamental excitations of magnetically ordered solid-state materials and provide great tunability and flexibility for interacting with various quantum modules for integration in diverse quantum systems. The concomitant rich variety of physics and material selections enable exploration of novel quantum phenomena in materials science and engineering. In addition, the relative ease of generating strong coupling and forming hybrid dynamic systems with other excitations makes hybrid magnonics a unique platform for quantum engineering. We start our discussion with circuit-based hybrid magnonic systems, which are coupled with microwave photons and acoustic phonons. Subsequently, we are focusing on the recent progress of magnon-magnon coupling within confined magnetic systems. Next we highlight new opportunities for understanding the interactions between magnons and nitrogen-vacancy centers for quantum sensing and implementing quantum interconnects. Lastly, we focus on the spin excitations and magnon spectra of novel quantum materials investigated with advanced optical characterization.

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Section: E Non-hermitian Physics and Exceptional Pointsmentioning

confidence: 99%

Section: E Non-hermitian Physics and Exceptional Pointsmentioning

confidence: 99%

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Awschalom

et al. 2021

IEEE Trans. Quantum Eng.

105

View full text Add to dashboard Cite

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“…Note added.-Recently, we became aware of a study presenting an infinite group delay and abrupt transition in a magnonic non-Hermitian system [33].…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…Among various types of multiple-path-induced interference, the Fano resonance [2] and its typical manifestations, the electromagnetically induced transparency (EIT) and electromagnetically induced absorption (EIABS) [3,4], are the most well-known ones. The Fano resonance and EIT-like (or chiral EIT [34], and infinite slow light [33] have recently been realized around exceptional points. Motivated by their potential applications in rapid transitions between fast and slow light, which facilitate coherent state storage and retrieval, it is highly desirable to have experimental realizations of in situ tunable and switchable absorption, transparency, and even amplification.…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, there appears growing interest to control the EIT and EIABS by introducing exceptional points [29][30][31]. Photon stops [32,33], chiral EIT [34], and infinite slow light [33] have recently been realized around exceptional points. Motivated by their potential applications in rapid transitions between fast and slow light, which facilitate coherent state storage and retrieval, it is highly desirable to have experimental realizations of in situ tunable and switchable absorption, transparency, and even amplification.…”

Section: Introductionmentioning

confidence: 99%

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Phase-Controlled Pathway Interferences and Switchable Fast-Slow Light in a Cavity-Magnon Polariton System

Jie

et al. 2021

Phys. Rev. Applied

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We study the phase-controlled transmission properties in a compound system consisting of a threedimensional copper cavity and an yttrium-iron-garnet (YIG) sphere. By tuning the relative phase of the magnon pumping and cavity-probe tones, constructive and destructive interferences occur periodically, which strongly modify both the cavity-field transmission spectra and the group delay of light. Moreover, the tunable amplitude ratio between pump-probe tones allows us to further improve the signal absorption or amplification, accompanied by either significantly enhanced optical advance or delay. Both the phase and amplitude ratio can be used to realize in situ tunable and switchable fast-slow light. The tunable phase and amplitude ratio lead to the zero reflection of the transmitted light and an abrupt fast-slow light transition. Our results confirm that direct magnon pumping through the coupling loops provides a versatile route to achieve controllable signal transmission, storage, and communication, which can be further expanded to the quantum regime, realizing coherent-state processing or quantum-limited precise measurements.

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Manipulating Light with Bound States in the Continuum: from Passive to Active Systems

Zeng,

Zhang,

Ouyang

et al. 2024

Advanced Optical Materials

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The manipulation of light has become the focus of various modern optical technologies. The emergence of bound states in the continuum (BICs) offers an alternative platform for controlling light, including the confinement and manipulation of polarization, amplitude, and phase. Currently, research on photonic BICs is maturing, with extensive exploration of methods for achieving BICs and their various applications, including lasing, sensing, and enhanced light‐matter interaction. In this review, an overview of photonic BICs is provided. Specifically, the unique properties of BICs are first presented, followed by their state‐of‐the‐art applications in passive systems, ranging from sensing to waveguiding, beam shaping, and chirality. The paradigm‐shifting developments in active systems resulting from the hybridization of BICs with active and novel materials are then highlighted. Finally, some of the challenges facing photonic BICs are discussed, along with future directions in terms of physics, design, fabrication, engineering, and tunability.

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Unconventional Singularity in Anti-Parity-Time Symmetric Cavity Magnonics

Cited by 130 publications

References 66 publications

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Phase-Controlled Pathway Interferences and Switchable Fast-Slow Light in a Cavity-Magnon Polariton System

Manipulating Light with Bound States in the Continuum: from Passive to Active Systems

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