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PT symmetry-based one-dimensional waveguide single photon transmission property analysis method

An analysis method and symmetry technique, applied in the field of analysis of single-photon transmission properties, which can solve problems such as the influence of gain effects and energy dissipation without consideration

Pending Publication Date: 2021-02-12
HANGZHOU DIANZI UNIV
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Problems solved by technology

The QED system currently studied is a non-conservative system, which has energy dissipation, and does not consider the influence of the gain effect

Method used

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  • PT symmetry-based one-dimensional waveguide single photon transmission property analysis method
  • PT symmetry-based one-dimensional waveguide single photon transmission property analysis method
  • PT symmetry-based one-dimensional waveguide single photon transmission property analysis method

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Embodiment Construction

[0061] The technical scheme of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0062] like figure 1 As shown, the one-dimensional waveguide single-photon transmission property analysis method based on PT symmetry in the embodiment of the present invention includes the following steps:

[0063] S1: Establish a PT symmetrical dual-cavity coupled one-dimensional photonic waveguide system;

[0064] Specifically, such as figure 2 As shown, will have an eigenfrequency w j (j=1,2) and decay rate γ j The two cavities of are coupled to one side of the one-dimensional photonic waveguide, and cavity 1 is a lossy cavity (ie, γ j >0), cavity 2 is a gain cavity (i.e. γ j a , A two-level atom with a transition frequency of Ω is embedded in the cavity 1, and a PT symmetric two-cavity coupled one-dimensional photonic waveguide system is obtained.

[0065] S2: written as the Hamiltonian of the system;

[0066] By electric polariza...

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Abstract

The invention belongs to the field of cavity quantum electrodynamics, and particularly relates to a PT symmetry-based one-dimensional waveguide single photon transmission property analysis method, which comprises the following steps of S1, establishing a PT symmetrical double-cavity coupling one-dimensional photon waveguide system; S2, writing the Hamiltonian quantity of the system; S3, determining the eigenstate of the system; S4, solving a scattering equation of the system by utilizing the Hamiltonian quantity and the eigenstate of the system; and S5, solving the reflection coefficient and the transmission coefficient of the system by utilizing the scattering equation and the wave function of the system. According to the invention, the one-dimensional waveguide single photon transmissionproperty based on PT symmetry can be accurately analyzed, and the influence on the single photon transmission property under the influence factors such as gain loss ratio, photon tunneling strength,cavity and atom coupling strength can be accurately reflected, so that the single photon scattering is controlled.

Description

technical field [0001] The invention belongs to the field of cavity quantum electrodynamics, in particular to an analysis method for the single-photon transmission property of a one-dimensional waveguide based on PT symmetry. Background technique [0002] The controllable photon scattering of 1D waveguides coupled to quantum emitters, known as waveguide quantum electrodynamics (waveguideQED), has been extensively studied in recent years. A 1D waveguide is a space-confined structure that enables strong coupling of light to atoms. Single-photon waveguide QED systems have many properties, such as quantum interference, superradiance, fano interference, etc., which have great application potential for quantum information technology and the design of quantum devices. [0003] Even-even symmetric time (PT) symmetric optical systems can be realized by loss and gain balancing. Interesting functionalities can also emerge in photonic devices due to novel optical effects arising from ...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/11G06F17/15G06F111/10
CPCG06F30/20G06F17/11G06F17/15G06F2111/10
Inventor 黄佳莹李浩珍曾然
Owner HANGZHOU DIANZI UNIV
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