Floquet Exceptional Topological Insulator

• URL: http://arxiv.org/abs/2301.13119v1
• Date: Mon, 30 Jan 2023 17:55:18 GMT
• Title: Floquet Exceptional Topological Insulator
• Abstract summary: We introduce Floquet exceptional topological insulator which results from shining light on a conventional NH topological insulator. These distinct surface states either fill the point gap in the complex eigenspectrum or exhibit exceptional points in the presence of a magnetic field. The existence of the Floquet biorthogonal Chern number and spectral winding number show that the momentum slices exhibit NH skin effect, even though the system as a whole does not.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose a novel way of modulating exceptional topology by implementing Floquet engineering in non-hermitian (NH) systems. We introduce Floquet exceptional topological insulator which results from shining light on a conventional three-dimensional NH topological insulator. Lightmatter interaction facilitates the quantum phases of matter to exhibit a novel phenomenon, where, the point gaps in the bulk host surface states. These distinct surface states either fill the point gap in the complex eigenspectrum or exhibit exceptional points in the presence of a magnetic field. We also highlight the existence of a quantum anomaly generated by photo-induced modulation. The existence of the Floquet biorthogonal Chern number and spectral winding number show that the momentum slices exhibit NH skin effect, even though the system as a whole does not. We also employ wave-dynamics evolution to illustrate the NH surface skin effect.

Related papers

• Far-field spatial coherence driven by lossy objects: first-principles approach unifying scattering of quantum light and thermal emission [51.56484100374058]
  We develop a first-principles framework based on the modified Langevin noise formalism to unify the scattering of quantum light and the intrinsic thermal emission of finite dissipative objects.<n>Applying this framework across optical regimes, we determine operational bounds for lossy quantum photonics.
  arXiv  Detail & Related papers  (2026-07-01T09:04:32Z)
• Probing Floquet topological phases via non-Hermitian skin effect of reflected waves [0.0]
  We investigate the scattering problem of a Floquet Chern insulator and reveal the non-Hermitian skin effect (NHSE) of reflected waves.<n>Our work highlights a frequency-dependent NHSE of reflected waves in driven systems and provides a real-space scattering approach to identify non-equilibrium topology.
  arXiv  Detail & Related papers  (2026-05-13T14:03:27Z)
• Quantum optomechanics of lossy bodies: general approach and structured squeezed vacuum effects [51.56484100374058]
  We investigate the overall optomechanical force experienced by a macroscopic lossy object in free space under external quantum illumination.<n>By driving the scattering field with an anisotropic, multimode squeezed vacuum state, the spatial profile of the electromagnetic quantum fluctuations can be engineered to exhibit broken rotational symmetry.<n>We establish a general formalism for macroscopic quantum optomechanics that operates beyond the constraints of thermal equilibrium.
  arXiv  Detail & Related papers  (2026-04-07T13:25:43Z)
• Liouvillian topology and non-reciprocal dynamics in open Floquet chains [0.0]
  We introduce and study a microscopic lattice model of a driven open quantum system described by a Markovian quantum master equation.<n>By encompassing quantum jump processes in the topological analysis, we uncover a distinct emphjump-induced topological phase.<n>We find that the NH skin effect, i.e.the accumulation of a macroscopic number of eigenstates at one end of the system, is already visible in the transient dynamics.
  arXiv  Detail & Related papers  (2025-11-20T19:00:05Z)
• Multi-Photon Quantum Rabi Models with Center-of-Mass Motion [45.73541813564926]
  We introduce a rigorous, second-quantized framework for describing multi-$Lambda$-atoms in a cavity.<n>A key feature of our approach is the systematic application of a Hamiltonian averaging theory to the atomic field operators.<n>A significant finding is the emergence of a particle-particle interaction mediated by ancillary states.
  arXiv  Detail & Related papers  (2025-07-07T09:50:48Z)
• Floquet spin textures in optically pumped non-Hermitian surface states [2.6264744694932496]
  NH systems due to interaction in equilibrium solids provide a unique opportunity for realizing light-NH matter hybrids via periodic irradiation.<n>Given NH topological surface states with magnetic disorder, here we reveal spectroscopically observable Floquet spin textures for this hybrid quantum matter.<n>With spin-resolved photoemission spectroscopy, this scenario bears prime physical interest by reaching the crossroad between solid-state interaction effects, non-Hermiticity, and light-matter coupling.
  arXiv  Detail & Related papers  (2025-07-02T03:03:36Z)
• Non-Hermitian Effects in Dicke models [18.25522741939446]
  We study the manifestation of non-Hermitian effects in the Dicke model of light-matter interaction. Our findings deepen the understanding of non-Hermitian physics in light-matter interaction.
  arXiv  Detail & Related papers  (2024-11-13T06:30:10Z)
• Observation of topology transition in Floquet non-Hermitian skin effects in silicon photonics [19.744996310272178]
  We realize the Floquet NHSE in periodically modulated optical waveguides integrated on a silicon photonics platform. Remarkably, we discover the transitions between the normal unipolar NHSEs and an unconventional bipolar NHSE. Our work unfolds a new route toward Floquet NHSEs originating from the interplay between gauge fields and dissipation effects.
  arXiv  Detail & Related papers  (2024-02-15T04:29:29Z)
• Simulating the Transverse Field Ising Model on the Kagome Lattice using a Programmable Quantum Annealer [0.0]
  We embed the antiferromagnetic Ising model on the Kagome lattice on the latest architecture of D-Wave's quantum annealer, the Advantage2 prototype. We show that under a finite longitudinal field the system exhibits a one-third magnetization plateau, consistent with a classical spin liquid state of reduced entropy. An anneal-pause-quench protocol is then used to extract an experimental ensemble of states resulting from the equilibration of the model at finite transverse and longitudinal field.
  arXiv  Detail & Related papers  (2023-10-10T15:22:01Z)
• Quantized topological energy pumping and Weyl points in Floquet synthetic dimensions with a driven-dissipative photonic molecule [2.846808930414845]
  Topological effects manifest in a wide range of physical systems. Dissipation is generally detrimental to such topological effects. Topological energy pumping in the incommensurately modulated photonic molecule is enhanced by the driven-dissipative nature of our platform.
  arXiv  Detail & Related papers  (2023-05-03T16:19:21Z)
• Probing and harnessing photonic Fermi arc surface states using light-matter interactions [62.997667081978825]
  We show how to image the Fermi arcs by studying the spontaneous decay of one or many emitters coupled to the system's border. We demonstrate that the Fermi arc surface states can act as a robust quantum link.
  arXiv  Detail & Related papers  (2022-10-17T13:17:55Z)
• Concentrated subradiant modes in one-dimensional atomic array coupled with chiral waveguides [0.510036543634541]
  Non-Hermitian systems have recently attracted broad interest and exhibited intriguing physical phenomena. Here we propose a non-Hermitian atom-waveguide system composed of a tilted one-dimensional atomic array. We find the excitation of the collective atomic states concentrates in the middle interface, pointing towards the non-Hermitian skin effect.
  arXiv  Detail & Related papers  (2022-08-23T07:34:26Z)
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
  We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators. We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure. The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
  arXiv  Detail & Related papers  (2021-05-27T18:00:02Z)
• Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices [62.997667081978825]
  We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
  arXiv  Detail & Related papers  (2020-11-16T08:03:44Z)
• Quantum electrodynamics in a topological waveguide [47.187609203210705]
  In this work we investigate the properties of superconducting qubits coupled to a metamaterial waveguide based on a photonic analog of the Su-Schrieffer-Heeger model. We explore topologically-induced properties of qubits coupled to such a waveguide, ranging from the formation of directional qubit-photon bound states to topology-dependent cooperative radiation effects.
  arXiv  Detail & Related papers  (2020-05-08T00:22:17Z)
• Theory of waveguide-QED with moving emitters [68.8204255655161]
  We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace. We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
  arXiv  Detail & Related papers  (2020-03-20T12:14:10Z)
• Quantum Hall phase emerging in an array of atoms interacting with photons [101.18253437732933]
  Topological quantum phases underpin many concepts of modern physics. Here, we reveal that the quantum Hall phase with topological edge states, spectral Landau levels and Hofstadter butterfly can emerge in a simple quantum system. Such systems, arrays of two-level atoms (qubits) coupled to light being described by the classical Dicke model, have recently been realized in experiments with cold atoms and superconducting qubits.
  arXiv  Detail & Related papers  (2020-03-18T14:56:39Z)
• Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
  We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit. We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront. The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
  arXiv  Detail & Related papers  (2020-03-09T21:27:02Z)

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.