Giant spin ensembles in waveguide magnonics

Abstract

The dipole approximation is usually employed to describe light-matter interactions under ordinary conditions. With the development of artificial atomic systems, `giant atom' physics is possible, where the scale of atoms is comparable to or even greater than the wavelength of the light they interact with, and the dipole approximation is no longer valid. It reveals interesting physics impossible in small atoms and may offer useful applications. Here, we experimentally demonstrate the giant spin ensemble (GSE), where a ferromagnetic spin ensemble interacts twice with the meandering waveguide, and the coupling strength between them can be continuously tuned from finite (coupled) to zero (decoupled) by varying the frequency. In the nested configuration, we investigate the collective behavior of two GSEs and find extraordinary phenomena that cannot be observed in conventional systems. Our experiment offers a new platform for `giant atom' physics.

16 pages, 8 figures

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Cited by in corpus (36)

• Generation of two-giant-atom entanglement in waveguide-QED systems
• Non-Markovian dynamics with a giant atom coupled to a semi-infinite photonic waveguide
• Single photon scattering from a chain of giant atoms coupled to a one-dimensional waveguide
• Quantum interference and controllable magic cavity QED via a giant atom in coupled resonator waveguide
• Nonreciprocal Synchronization of Active Quantum Spins
• Catch and release of propagating bosonic field with non-Markovian giant atom
• Avoiding decoherence with giant atoms in a two-dimensional structured environment
• Anomalous Long-Distance Coherence in Critically-Driven Cavity Magnonics
• Quantum optics with giant atoms in a structured photonic bath
• Giant Emitters in a Structured Bath with Non-Hermitian Skin Effect
• Magnonic Hall Effect and Magnonic Holography of Hopfions
• Single-photon scattering in giant-atom waveguide systems with chiral coupling
• Atom-photon dressed states in a waveguide-QED system with multiple giant atoms
• Single-photon scattering in giant-atom topological-waveguide-QED systems
• Controlling photons by phonons via giant atom in a waveguide QED setup
• Kerr nonlinearity induced strong spin-magnon coupling
• Non-Markovian dynamics with a driven three-level giant atom in a semi-infinite photonic waveguide
• Entangling two giant atoms via a topological waveguide
• Simulating open quantum systems with giant atoms
• Single-mode magnon-polariton lasing and amplification controlled by dissipative coupling
• Universal quantum control by non-Hermitian Hamiltonian
• Simulating and probing many-body quantum states in waveguide-QED systems with giant atoms
• Giant atom with disorders: Effects from imperfect couplings
• Unidirectional exceptional point of reflectionless states in a magnonic mirror array
• Quantum Interference in Atomic Systems
• Scalable quantum simulator with an extended gate set in giant atoms
• Selective band interaction and long-range hopping in a structured environment with giant atoms
• Spontaneous superradiant photon current
• Microwave interference from a spin ensemble and its mirror image in waveguide magnonics
• Theory and Experiment of Chirality-induced Magnetic Nonreciprocity Manifested by Coupling Phase
• Realizing on-demand all-to-all selective interactions between distant spin ensembles
• Oscillating bound states in waveguide-QED system with two giant atoms
• Strongly coupled giant-atom waveguide quantum electrodynamics
• Remote magnon-phonon entanglement in the waveguide-magnomechanics
• Exotic collective behaviors of giant quantum emitters in two-dimensional baths
• Amplifying Decoherence-Free Many-Body Interactions with Giant Atoms Coupled to Parametric Waveguide