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Method for calculating Casimir-Polder torque between two-energy-level atom and saturated ferrite interface

A computational method, ferrite technology, applied in the field of quantum optics, which can solve problems such as less research on interactions

Pending Publication Date: 2021-04-20
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, ferrite is widely used in communication broadcasting, radar navigation, automatic control and other fields, but there are few studies on the interaction between atoms and ferrite materials.

Method used

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  • Method for calculating Casimir-Polder torque between two-energy-level atom and saturated ferrite interface
  • Method for calculating Casimir-Polder torque between two-energy-level atom and saturated ferrite interface
  • Method for calculating Casimir-Polder torque between two-energy-level atom and saturated ferrite interface

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Embodiment Construction

[0072] The present invention will be further described below in conjunction with the accompanying drawings.

[0073] The calculation method of the Casimir-Polder torque between the two-level atom of the present invention and the saturated ferrite interface, such as figure 1 As shown, there are five steps:

[0074] S1: Establish a two-level atom and a saturated ferrite interface model.

[0075] The model is to choose a two-level atom in the vacuum to be located above the ferrite plate, and the vertical distance is z A , taking the interface between the ferrite plate and the vacuum as the zero point of the z-axis, then the z-axis component of the atom is z A (z A >0).

[0076] S2: Determining the electromagnetic properties of the saturated ferrite interface.

[0077] Ferrite material is a kind of anisotropic strong magnetic response material, that is, under the condition of applying static magnetic field in different directions, the magnetic permeability of ferrite material...

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Abstract

The invention provides a method for calculating Casimir-Polder torque between a two-energy-level atom and a saturated ferrite interface. The method comprises the following steps: S1, establishing an atom and ferrite interface model; S2, determining electromagnetic characteristics of the ferrite material plate; S3, calculating a modal expansion formula of the Casimir-Polder torque; S4, calculating the Casimir-Polder torque in the form of a Green function; and S5, calculating the Casimir-Polder torque under the model. The method disclosed by the invention relates to a calculation method of the Casimir-Polder torque between the atom and the saturated ferrite interface, can accurately analyze the Casimir-Polder torque between the atom and the saturated ferrite interface, and reflects the influence of the frequency and the plate spacing on the Casimir-Polder torque between the atom and the saturated ferrite interface.

Description

technical field [0001] The invention belongs to the field of quantum optics, and in particular relates to a calculation method for Casimir-Polder torque between a two-level atom and a saturated ferrite interface. Background technique [0002] The Casimir-Polder (CP) torque originates from the transfer of angular momentum between light and matter, and is one of the macroscopic effects of quantum vacuum fluctuations. An optical torque applied to an atom, molecule or particle induces the rotation of the atom about a specific axis and provides an additional degree of freedom to change the state of the object under consideration. Casimir-Polder torque plays an important role in the fields of physical chemistry, biology, and medicine, and is also a major tool for atomic control and manipulation, such as light trapping and optical tweezers of ultracold gas atoms. In a related context, the Casimir–Polder torque on two-level systems interacting with the general electromagnetic envir...

Claims

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Application Information

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IPC IPC(8): G16C10/00G16C20/10G16C60/00
Inventor 曾然徐思远胡悦李浩珍杨淑娜胡淼李齐良
Owner HANGZHOU DIANZI UNIV