Cavity-Mediated Coupling between Local and Nonlocal Modes in Landau Polaritons
- URL: http://arxiv.org/abs/2509.05738v1
- Date: Sat, 06 Sep 2025 15:04:14 GMT
- Title: Cavity-Mediated Coupling between Local and Nonlocal Modes in Landau Polaritons
- Authors: Sae R. Endo, Dasom Kim, Shuang Liang, Geon Lee, Sunghwan Kim, Alan Covarrubias-Morales, Minah Seo, Michael J. Manfra, Dukhyung Lee, Motoaki Bamba, Junichiro Kono,
- Abstract summary: We show nonlocal multimode coupling in a Landau polariton system.<n>Our results establish a pathway for engineering multimode light-matter interactions involving zero- and finite-momentum matter modes.
- Score: 8.965474824043103
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The multimode ultrastrong coupling (USC) regime has emerged as a novel platform for accessing previously inaccessible phenomena in cavity quantum electrodynamics. Of particular interest are cavity-mediated correlations between local and nonlocal excitations, or equivalently, between modes at zero and finite in-plane momentum modes, which offer new opportunities for controlling light--matter interactions across space. However, direct experimental evidence of such interactions has remained elusive. Here, we demonstrate nonlocal multimode coupling in a Landau polariton system, where cavity photons simultaneously interact with the zero-momentum cyclotron resonance and finite-momentum magnetoplasmons of a two-dimensional electron gas in a GaAs quantum well. Our slot cavities, with their subwavelength mode volumes, supply in-plane momentum components that enable the excitation of finite-momentum matter modes. Terahertz time-domain magnetospectroscopy measurements reveal a clear splitting of the upper-polariton branch, arising from hybridization between magnetoplasmon modes and the cavity--cyclotron-resonance hybrids. Extracted coupling strengths confirm USC of the cyclotron resonance and strong coupling of the magnetoplasmon modes to the cavity field, respectively. The experimental results are well captured by the multimode Hopfield model and finite-element simulations. These findings establish a pathway for engineering multimode light--matter interactions involving zero- and finite-momentum matter modes in the USC regime.
Related papers
- Bose condensation and Bogoliubov excitation in resonator-embedded superconducting qubit network [53.72731614116211]
Superconducting qubit networks (SQNs) embedded in a low-dissipative resonator are a promising device.<n>A quantum ac Stark effect provides by coupling between an SQN and microwave photons of a resonator, leads to a strong nonlinear interaction between photons.
arXiv Detail & Related papers (2026-01-21T15:43:43Z) - Superstrong Dynamics and Directional Emission of a Giant Atom in a Structured Bath [0.0]
Quantum emitters coupled to waveguides with nonlinear dispersion show rich quantum dynamics.<n>Recent advances in engineered photonic environments now allow the realization of discrete-site waveguides with tailored dispersion.<n>We study a transmon qubit non-locally coupled to a high-impedance coupled cavity array.
arXiv Detail & Related papers (2025-09-01T16:06:30Z) - Constrained many-body phases in a $\mathbb{Z}_2$-Higgs lattice gauge theory [39.58317527488534]
We study a one-dimensional $mathbbZ$ lattice gauge theory coupled to soft-core bosonic matter at unit filling.<n>Through a combination of analytical perturbative approaches, we uncover a rich phase diagram driven by gauge-field-mediated resonant pair hopping.<n>The presence of a bunching state with large number fluctuations motivates experimental realizations in hybrid boson-qubit quantum simulation platforms.
arXiv Detail & Related papers (2025-03-05T19:00:07Z) - Mode-multiplexing deep-strong light-matter coupling [0.0]
We show a new regime of record-strong light-matter interaction which exploits the cooperative dipole moments of multiple, highly non-resonant magnetoplasmon modes.
The extreme interaction drives strongly subcycle exchange of vacuum energy between multiple bosonic modes.
This offers avenues towards tailoring phase transitions by coupling otherwise non-interacting modes.
arXiv Detail & Related papers (2023-09-13T12:27:35Z) - Multimode Ultrastrong Coupling in Three-Dimensional Photonic-Crystal Cavities [36.212701687134064]
One-dimensional photonic-crystal cavities have uniform spatial profiles in the lateral plane.
Fabrication challenges have hindered the achievement of strong coupling in 3D-PCCs.
We report the realization of multimode ultrastrong coupling in a 3D-PCC at terahertz frequencies.
arXiv Detail & Related papers (2023-08-23T21:14:01Z) - Plasmon mediated coherent population oscillations in molecular
aggregates [2.2723634099641004]
coherent coupling of quantum emitters to vacuum fluctuations of the light field offers opportunities for manipulating the optical and transport properties of nanomaterials.
Here, we use ultrafast two-dimensional electronic spectroscopy to probe the quantum dynamics of J-aggregate excitons collectively coupled to the spatially structured plasmonic fields of a gold nanoslit array.
arXiv Detail & Related papers (2023-07-27T08:57:46Z) - Tuning photon-mediated interactions in a multimode cavity: from
supersolid to insulating droplets hosting phononic excitations [0.0]
We study supersolid and droplet states with phonon-like lattice excitations by coupling a Bose gas to longitudinal modes of a ring cavity.
The interplay between contact collisional and tunable-range cavity-mediated interactions leads to a rich phase diagram.
arXiv Detail & Related papers (2023-05-25T16:58:55Z) - Probing the symmetry breaking of a light--matter system by an ancillary
qubit [50.591267188664666]
Hybrid quantum systems in the ultrastrong, and even more in the deep-strong, coupling regimes can exhibit exotic physical phenomena.
We experimentally observe the parity symmetry breaking of an ancillary Xmon artificial atom induced by the field of a lumped-element superconducting resonator.
This result opens a way to experimentally explore the novel quantum-vacuum effects emerging in the deep-strong coupling regime.
arXiv Detail & Related papers (2022-09-13T06:14:08Z) - Tuning long-range fermion-mediated interactions in cold-atom quantum
simulators [68.8204255655161]
Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior.
Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
arXiv Detail & Related papers (2022-03-31T13:32:12Z) - Nearly-Resonant Crystalline-Phononic Coupling in Quantum Spin Liquid
Candidate CsYbSe$_2$ [48.30279211143264]
CsYbSe$$, a recently identified quantum spin liquid (QSL) candidate, exhibits strong crystal electric field excitations.
We identify phonon and CEF modes with Raman spectroscopy and observe strong CEF-phonon mixing resulting in a vibronic bound state.
arXiv Detail & Related papers (2021-11-06T17:00:34Z) - A low-loss ferrite circulator as a tunable chiral quantum system [108.66477491099887]
We demonstrate a low-loss waveguide circulator constructed with single-crystalline yttrium iron garnet (YIG) in a 3D cavity.
We show the coherent coupling of its chiral internal modes with integrated superconducting niobium cavities.
We also probe experimentally the effective non-Hermitian dynamics of this system and its effective non-reciprocal eigenmodes.
arXiv Detail & Related papers (2021-06-21T17:34:02Z) - Fano resonances induced by the topological magnetoelectric effect [0.0]
We investigate the interaction between a topological insulator nanosphere made of TlBiSe$$ interacting with a CdSe quantum dot.
We find the emergence of Fano resonances which are direct manifestations of the $mathbbZ_2$ invariant of topological insulators.
arXiv Detail & Related papers (2020-09-30T15:08:11Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.