Spatial distribution of electric field of equal probability quantum walks based on three-level quantum system

• URL: http://arxiv.org/abs/2203.06346v1
• Date: Sat, 12 Mar 2022 04:55:25 GMT
• Title: Spatial distribution of electric field of equal probability quantum walks based on three-level quantum system
• Authors: Xiaoguang Chen
• Abstract summary: In resonance, electrons transition from high energy level to low energy level and release photons; Or absorb photons and transition from low energy level to high energy level. The optical radiation in the quantum walk is mapped into a Gaussian pulse of the electric field, and the Maxwell's equation is solved. The process of quantum walking on two parallel lines is further discussed, involving some physical properties.
• Score: 0.3335932527835653
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Based on the three-level quantum system, when it is in resonance, according to any two lattice points closest to Hamiltonian coupling, electrons transition from high energy level to low energy level and release photons; Or absorb photons and transition from low energy level to high energy level, thus obtaining the physical process of quantum walking along a straight line under the condition of equal probability. Then, the optical radiation in the quantum walk is mapped into a Gaussian pulse of the electric field, and the Maxwell's equation is solved by the three dimensional finite-difference time-domain method to obtain the spatial electric distributio. Finally, the physical process ofquantum walking on two parallel lines is further discussed, involving some physical properties such as electromagnetic coupling or coherence, quantum state exchange and so on. The electric field coupling between two lines can be calculated by FDTD, which provides a useful tool for the design and analysis of quantum devices.

Related papers

• Quantum trajectories and output field properties for two-photon input field [0.0]
  We describe a quantum system interacting with a light prepared in a continuous-mode two-photon state. The problem of a conditional evolution of the quantum system, depending on the results of the measurement of the output field, is formulated. We show how to apply the quantum trajectories to obtain the formula for the probability of the two-photon absorption for a three-level atom in a ladder configuration.
  arXiv  Detail & Related papers  (2024-09-11T17:18:38Z)
• Entanglement of photonic modes from a continuously driven two-level system [34.50067763557076]
  We experimentally generate entangled photonic modes by continuously exciting a quantum emitter, a superconducting qubit, with a coherent drive. We show that entanglement is generated between modes extracted from the two sidebands of the resonance fluorescence spectrum. Our approach can be utilized to distribute entanglement at a high rate in various physical platforms.
  arXiv  Detail & Related papers  (2024-07-10T18:48:41Z)
• Dipole coupling of a bilayer graphene quantum dot to a high-impedance microwave resonator [0.14908922253160745]
  superconducting microwave resonator with a double quantum dot electrostatically defined in a graphene-based van der Waals heterostructure. We achieve sensitive and fast detection with a signal-to-noise ratio of 3.5 within 1 $mumathrms$ integration time. Our results introduce cQED as a probe for quantum dots in van der Waals materials and indicate a path toward coherent charge-photon coupling with bilayer graphene quantum dots.
  arXiv  Detail & Related papers  (2023-12-22T11:59:20Z)
• Bound state of distant photons in waveguide quantum electrodynamics [137.6408511310322]
  Quantum correlations between distant particles remain enigmatic since the birth of quantum mechanics. We predict a novel kind of bound quantum state in the simplest one-dimensional setup of two interacting particles in a box. Such states could be realized in the waveguide quantum electrodynamics platform.
  arXiv  Detail & Related papers  (2023-03-17T09:27:02Z)
• Jaynes-Cummings interaction between low energy free-electrons and cavity photons [0.571097144710995]
  We propose a new approach to realize the Jaynes-Cummings Hamiltonian using low energy free-electrons coupled to dielectric microcavities. Our approach utilizes quantum recoil, which causes a large detuning that inhibits the emission of multiple consecutive photons. We show that this approach can be used for generation of single photons with unity efficiency and high fidelity.
  arXiv  Detail & Related papers  (2023-02-03T07:06:51Z)
• 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 susceptibilities in time-domain sampling of electric field fluctuations [0.0]
  We develop a microscopic quantum theory of the electro-optic process using an ensemble of non-interacting three-level systems. We show that the quantum contributions can be substantial and might even dominate the total response. In a complementary regime, electro-optic sampling can serve as a spectroscopic tool to study the pure quantum susceptibilities of materials.
  arXiv  Detail & Related papers  (2021-03-13T13:22:34Z)
• Spin-Dependent Transport Through a Colloidal Quantum Dot: The Role of Exchange Interactions [0.0]
  We combine atomistic electronic structure calculations with quantum master equation methods to study the transport of electrons and holes through strongly confined quantum dots. We find that a competition between the energy spacing between the two lowest quasiparticle energy levels determines the spin states of the lowest two quasiparticle energy levels. The low density of electron states results in a spin singlet being the lowest energy two-electron state whereas, in contrast, the high density of states and significant exchange interaction results in a spin triplet being the lowest energy two-hole state.
  arXiv  Detail & Related papers  (2021-02-15T19:00:00Z)
• Quantum Phases of Matter on a 256-Atom Programmable Quantum Simulator [41.74498230885008]
  We demonstrate a programmable quantum simulator based on deterministically prepared two-dimensional arrays of neutral atoms. We benchmark the system by creating and characterizing high-fidelity antiferromagnetically ordered states. We then create and study several new quantum phases that arise from the interplay between interactions and coherent laser excitation.
  arXiv  Detail & Related papers  (2020-12-22T19:00:04Z)
• 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)
• Generating Spatially Entangled Itinerant Photons with Waveguide Quantum Electrodynamics [43.53795072498062]
  In this work, we demonstrate the deterministic generation of such photons using superconducting transmon qubits that are directly coupled to a waveguide. We generate two-photon N00N states and show that the state and spatial entanglement of the emitted photons are tunable via the qubit frequencies.
  arXiv  Detail & Related papers  (2020-03-16T16:03:27Z)

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.