Topological Properties of Photonic Bands with Synthetic Momentum

• URL: http://arxiv.org/abs/2111.02843v4
• Date: Thu, 25 Nov 2021 15:44:17 GMT
• Title: Topological Properties of Photonic Bands with Synthetic Momentum
• Authors: H. C. Nguyen, Dung Xuan Nguyen, Thibaud Louvet, Xavier Letartre, Pierre Viktorovitch, Hai Son Nguyen
• Abstract summary: We investigate topological aspects of photonic crystal bands in a hybrid momentum space consisting of a genuine momentum and a synthetic one. Remarkably, the unconventional behaviour of the synthetic momentum allows for the existence of non-trivial topological phases. Our results pave the way to the paradigm of rich topological phenomena of photonic systems with hybrid momentum space.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate topological aspects of photonic crystal bands in a hybrid momentum space consisting of a genuine momentum and a synthetic one. The system is realised by a one-dimensional system of bilayer photonic grating, with the translational displacement between the two layers naturally taking the role of the synthetic momentum. Remarkably, the unconventional behaviour of the synthetic momentum allows for the existence of non-trivial topological phases of the system associated with a non-zero total Berry flux without breaking the time-reversal symmetry. Moreover, the resulting band structure in the hybrid momentum space realises the interesting dynamics of merging and splitting of twin Dirac points, as well as gap opening as the system parameters vary. Introducing a simple topological argument, we explain all the changes of the total Berry flux associated with the topological phase transitions. As a signature of different topological phases, edge states at their interface are calculated and analysed in detail. The optomechanical nature of the system also allows for the investigation of the adiabatic evolution of the edge states. Our results pave the way to the paradigm of rich topological phenomena of photonic systems with hybrid momentum space.

Related papers

• Probing Topological Anderson Transition in Quasiperiodic Photonic Lattices via Chiral Displacement and Wavelength Tuning [0.0]
  We report on a topological Anderson transition caused by quasiperiodic intra-cell coupling disorder in photonic Su-Schrieffer-Heeger lattices. As the quasiperiodic strength is varied, the system exhibits a reentrant transition from a trivial phase to a topological phase. Unlike the traditional detection of photonic topological edge modes, we measure the mean chiral displacement from the transport of light.
  arXiv  Detail & Related papers  (2025-03-10T10:52:57Z)
• Emerging Non-Hermitian Topology in a Chiral Driven-Dissipative Bose-Hubbard Model [0.0]
  We introduce a driven-dissipative Bose-Hubbard chain describing coupled lossy photonic modes. We numerically prove that the steady-state solution is stabilized by an inhomogeneous profile of the driving amplitude. Our work shows the emergence of non-Hermitian topological phases in an interacting model that can be naturally implemented with superconducting circuits.
  arXiv  Detail & Related papers  (2024-11-13T19:00:34Z)
• Dynamical topological phase transition in cold Rydberg quantum gases [23.439762818503013]
  We report the experimental observation of dynamical topological phase transitions in cold Rydberg atomic gases under a microwave field driving. At the transition state, where the winding number flips, the topology of these trajectories evolves into more non-trivial structures.
  arXiv  Detail & Related papers  (2024-09-17T09:59:36Z)
• Passive photonic CZ gate with two-level emitters in chiral multi-mode waveguide QED [41.94295877935867]
  We design a passive conditional gate between co-propagating photons using an array of only two-level emitters. The key resource is to harness the effective photon-photon interaction induced by the chiral coupling of the emitter array to two waveguide modes. We show how to harness this non-linear phase shift to engineer a conditional, deterministic photonic gate in different qubit encodings.
  arXiv  Detail & Related papers  (2024-07-08T18:00:25Z)
• Manipulating multiple optical parametric processes in photonic topological insulators [6.655289256837963]
  We show two distinct edge modes corresponding to different frequency ranges in both sandwich kagome and honeycomb topological designs. These two topological edge modes enable two types of optical parametric processes through four-wave mixing. The devices emulating photonic valley-Hall insulators allow the frequency division of two transverse modes.
  arXiv  Detail & Related papers  (2024-01-12T07:29:36Z)
• Optomechanical realization of the bosonic Kitaev-Majorana chain [0.0]
  We report the experimental realization of its bosonic analogue in a nano-optomechanical network. We observe several extraordinary phenomena in the bosonic dynamics and transport. We present an experimental demonstration of an exponentially enhanced response to a small perturbation as a consequence of non-Hermitian topology.
  arXiv  Detail & Related papers  (2023-09-11T21:10:22Z)
• Topological zero modes and edge symmetries of metastable Markovian bosonic systems [0.0]
  We study tight bosonic analogs of the Majorana and Dirac edge modes characteristic of topological superconductors and insulators. We show the possibility of anomalous parity dynamics for a bosonic cat state prepared in a topologically metastable system. Our results point to a new paradigm of genuine symmetry-protected topological physics in free bosons.
  arXiv  Detail & Related papers  (2023-06-23T18:00:03Z)
• Geometric phases along quantum trajectories [58.720142291102135]
  We study the distribution function of geometric phases in monitored quantum systems. For the single trajectory exhibiting no quantum jumps, a topological transition in the phase acquired after a cycle. For the same parameters, the density matrix does not show any interference.
  arXiv  Detail & Related papers  (2023-01-10T22:05:18Z)
• Tunable directional photon scattering from a pair of superconducting qubits [105.54048699217668]
  In the optical and microwave frequency ranges tunable directionality can be achieved by applying external magnetic fields. We demonstrate tunable directional scattering with just two transmon qubits coupled to a transmission line.
  arXiv  Detail & Related papers  (2022-05-06T15:21:44Z)
• Ultra-long photonic quantum walks via spin-orbit metasurfaces [52.77024349608834]
  We report ultra-long photonic quantum walks across several hundred optical modes, obtained by propagating a light beam through very few closely-stacked liquid-crystal metasurfaces. With this setup we engineer quantum walks up to 320 discrete steps, far beyond state-of-the-art experiments.
  arXiv  Detail & Related papers  (2022-03-28T19:37:08Z)
• Topological transitions with continuously monitored free fermions [68.8204255655161]
  We show the presence of a topological phase transition that is of a different universality class than that observed in stroboscopic projective circuits. We find that this entanglement transition is well identified by a combination of the bipartite entanglement entropy and the topological entanglement entropy.
  arXiv  Detail & Related papers  (2021-12-17T22:01:54Z)
• Bridging the gap between topological non-Hermitian physics and open quantum systems [62.997667081978825]
  We show how to detect a transition between different topological phases by measuring the response to local perturbations. Our formalism is exemplified in a 1D Hatano-Nelson model, highlighting the difference between the bosonic and fermionic cases.
  arXiv  Detail & Related papers  (2021-09-22T18:00:17Z)
• Topologically Protecting Squeezed Light on a Photonic Chip [58.71663911863411]
  Integrated photonics offers an elegant way to increase the nonlinearity by confining light strictly inside the waveguide. We experimentally demonstrate the topologically protected nonlinear process of spontaneous four-wave mixing enabling the generation of squeezed light on a silica chip.
  arXiv  Detail & Related papers  (2021-06-14T13:39:46Z)
• Qubit-photon bound states in topological waveguides with long-range hoppings [62.997667081978825]
  Quantum emitters interacting with photonic band-gap materials lead to the appearance of qubit-photon bound states. We study the features of the qubit-photon bound states when the emitters couple to the bulk modes in the different phases. We consider the coupling of emitters to the edge modes appearing in the different topological phases.
  arXiv  Detail & Related papers  (2021-05-26T10:57:21Z)
• Observation of arbitrary topological windings of a non-Hermitian band [2.9564207475274467]
  A key topological feature, unique to non-Hermitian systems, is the non-trivial winding of the energy band in the complex energy plane. Our results open a pathway for the experimental synthesis and characterization of topologically non-trivial phases in non-conservative systems.
  arXiv  Detail & Related papers  (2020-11-29T04:27:21Z)
• Engineering multipartite entangled states in doubly pumped parametric down-conversion processes [68.8204255655161]
  We investigate the quantum state generated by optical parametric down-conversion in a $chi(2) $ medium driven by two modes. The analysis shows the emergence of multipartite, namely 3- or 4-partite, entangled states in a subset of the modes generated by the process.
  arXiv  Detail & Related papers  (2020-07-23T13:53:12Z)
• Hyperentanglement in structured quantum light [50.591267188664666]
  Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols. Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes. We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
  arXiv  Detail & Related papers  (2020-06-02T18:00:04Z)
• Exploring 2D synthetic quantum Hall physics with a quasi-periodically driven qubit [58.720142291102135]
  Quasi-periodically driven quantum systems are predicted to exhibit quantized topological properties. We experimentally study a synthetic quantum Hall effect with a two-tone drive.
  arXiv  Detail & Related papers  (2020-04-07T15:00:41Z)
• Dynamical solitons and boson fractionalization in cold-atom topological insulators [110.83289076967895]
  We study the $mathbbZ$ Bose-Hubbard model at incommensurate densities. We show how defects in the $mathbbZ$ field can appear in the ground state, connecting different sectors. Using a pumping argument, we show that it survives also for finite interactions.
  arXiv  Detail & Related papers  (2020-03-24T17:31:34Z)
• Optical imprinting of superlattices in two-dimensional materials [0.0]
  We use an optical method of shining circularly polarized and periodic laser fields to imprint structures in two-dimensional electronic systems. By changing the configuration of the optical field, we synthesize various lattice structures with different spatial symmetry, periodicity, and strength.
  arXiv  Detail & Related papers  (2019-12-30T19:00:22Z)

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.