Electron conductance and many-body marker of a cavity-embedded topological 1D chain

• URL: http://arxiv.org/abs/2402.19244v2
• Date: Wed, 20 Nov 2024 19:09:25 GMT
• Title: Electron conductance and many-body marker of a cavity-embedded topological 1D chain
• Authors: Danh-Phuong Nguyen, Geva Arwas, Cristiano Ciuti,
• Abstract summary: We show that electron-photon entanglement produces dramatic differences with respect to predictions of mean-field theory. We reveal how the quantization of transport is modified by the cavity vacuum fields for a finite-size chain.
• Score: 0.0
• License:
• Abstract: We investigate many-body topological and transport properties of a one-dimensional Su-Schrieffer-Heeger (SSH) topological chain coupled to the quantum field of a cavity mode. The quantum conductance is determined via Green's function formalism in terms of the light-matter eigenstates calculated via exact diagonalization for a finite number of electrons. We show that the topology of the cavity-embedded many-electron system is described by a generalized electron-photon Zak marker. We reveal how the quantization of transport is modified by the cavity vacuum fields for a finite-size chain and how it is impacted by electronic disorder. Moreover, we show that electron-photon entanglement produces dramatic differences with respect to the predictions of mean-field theory, which strongly underestimates cavity-modified transport.

Related papers

• Floquet interferometry of a dressed semiconductor quantum dot [0.7852714805965528]
  We demonstrate state dressing in a semiconductor quantum dot tunnel-coupled to a charge reservoir. We develop a theory based on the quantum dynamics of the Floquet ladder. We show how the technique finds applications in the accurate electrostatic characterisation of semiconductor quantum dots.
  arXiv  Detail & Related papers  (2024-07-19T12:20:30Z)
• Thermalization and Criticality on an Analog-Digital Quantum Simulator [133.58336306417294]
  We present a quantum simulator comprising 69 superconducting qubits which supports both universal quantum gates and high-fidelity analog evolution. We observe signatures of the classical Kosterlitz-Thouless phase transition, as well as strong deviations from Kibble-Zurek scaling predictions. We digitally prepare the system in pairwise-entangled dimer states and image the transport of energy and vorticity during thermalization.
  arXiv  Detail & Related papers  (2024-05-27T17:40:39Z)
• Electron Transport Through a 1D Chain of Dopant-Based Quantum Dots [0.0]
  The Fermi-Hubbard model is the prototypical model used to study quantum many-body systems. Recent research has shown that the extended Fermi-Hubbard model is more accurate. This research will lead to a better understanding of electron behavior in silicon-doped semiconductors.
  arXiv  Detail & Related papers  (2024-02-06T16:41:59Z)
• Quantum electron transport controlled by cavity vacuum fields [0.0]
  We study theoretically how the coupling to cavity vacuum fields affects the electron transport in quantum conductors. We show how the cavity vacuum fields can lead to both large enhancement or suppression of electron conductance in the ballistic regime.
  arXiv  Detail & Related papers  (2022-06-27T16:27:16Z)
• Stochastic Variational Approach to Small Atoms and Molecules Coupled to Quantum Field Modes [55.41644538483948]
  We present a variational calculation (SVM) of energies and wave functions of few particle systems coupled to quantum fields in cavity QED. Examples for a two-dimensional trion and confined electrons as well as for the He atom and the Hydrogen molecule are presented.
  arXiv  Detail & Related papers  (2021-08-25T13:40:42Z)
• Quantum dynamics of open many-qubit systems strongly coupled to a quantized electromagnetic field in dissipative cavities [0.0]
  We study quantum dynamics of many-qubit systems strongly coupled to a quantized electromagnetic cavity mode. We show that depending on the initial quantum state preparation, the systems can evolve into a rich variety of entangled states.
  arXiv  Detail & Related papers  (2021-05-31T02:08:11Z)
• Quantum particle across Grushin singularity [77.34726150561087]
  We study the phenomenon of transmission across the singularity that separates the two half-cylinders. All the local realisations of the free (Laplace-Beltrami) quantum Hamiltonian are examined as non-equivalent protocols of transmission/reflection. This allows to comprehend the distinguished status of the so-called bridging' transmission protocol previously identified in the literature.
  arXiv  Detail & Related papers  (2020-11-27T12:53:23Z)
• General quantum-mechanical solution for twisted electrons in a uniform magnetic field [68.8204255655161]
  A theory of twisted (and other structured) paraxial electrons in a uniform magnetic field is developed. The observable effect of a different behavior of relativistic Laguerre-Gauss beams with opposite directions of the orbital angular momentum penetrating from the free space into a magnetic field is predicted.
  arXiv  Detail & Related papers  (2020-05-13T16:35:10Z)
• Universal model for electron thermal-field emission from two-dimensional semimetals [3.205614282399206]
  We present the theory of out-of-plane (or vertical) electron thermal-field emission from 2D semimetals. We show that the current-voltage-temperature characteristic is well-captured by a universal scaling relation applicable for broad classes of 2D semimetals.
  arXiv  Detail & Related papers  (2020-03-31T07:50:20Z)
• Quantum decoherence by Coulomb interaction [58.720142291102135]
  We present an experimental study of the Coulomb-induced decoherence of free electrons in a superposition state in a biprism electron interferometer close to a semiconducting and metallic surface. The results will enable the determination and minimization of specific decoherence channels in the design of novel quantum instruments.
  arXiv  Detail & Related papers  (2020-01-17T04:11:44Z)
• Probing chiral edge dynamics and bulk topology of a synthetic Hall system [52.77024349608834]
  Quantum Hall systems are characterized by the quantization of the Hall conductance -- a bulk property rooted in the topological structure of the underlying quantum states. Here, we realize a quantum Hall system using ultracold dysprosium atoms, in a two-dimensional geometry formed by one spatial dimension. We demonstrate that the large number of magnetic sublevels leads to distinct bulk and edge behaviors.
  arXiv  Detail & Related papers  (2020-01-06T16:59:08Z)

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.