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A method for preparing spin-squeezed states of dissipative systems

A squeezed state and dissipation technology, applied in the direction of automatic power control, electrical components, etc., can solve problems such as destruction and spin squeezed state instability, and achieve simple and easy-to-obtain effects.

Active Publication Date: 2022-05-20
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a spin-squeezed state of a dissipative system to solve the problem that the spin-squeezed state is unstable and destroyed

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  • A method for preparing spin-squeezed states of dissipative systems
  • A method for preparing spin-squeezed states of dissipative systems
  • A method for preparing spin-squeezed states of dissipative systems

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the present invention will be more clear. It should be noted that all the drawings are in very simplified form and inaccurate scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0024] It should be noted that, in order to clearly illustrate the content of the present invention, the present invention specifically cites multiple embodiments to further explain different implementation modes of the present invention, wherein the multiple embodiments are enumerated rather than exhaustive. In addition, for the sake of brevity of description, the content mentioned in the previous embodiment is often omitted in the latter embodiment, therefore, the content not mentioned in the later embo...

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Abstract

The invention discloses a method for preparing a spin-squeezed state of a dissipative system, which includes: providing a dissipative system, the dissipative system has an energy level structure whose atomic spin state depends on atomic interaction; The system applies Raman light, so that the excited state dissipated by Raman optical coupling and the ground state of the atom produce non-Hermitian spin-orbit coupling; record the spin fluctuation signal from the dissipative system, from the spin Determine the variation of the experimental parameters of the spin interaction over time in the fluctuating signal; according to the variation of the experimental parameters of the spin interaction over time, measure the spin compression properties when the non-Hermitian coefficient is dominant, to A spin-squeezed state is produced. The invention makes the spin compression change from periodic change to a stable and optimal spin compression state, and finally reaches a stable spin compression state with time evolution, which produces a counter-intuitive physical effect, not only does not destroy the spin compression effect, but instead Easier to obtain and more stable.

Description

technical field [0001] The invention belongs to the technical field of quantum precision measurement, in particular to a method for preparing a spin-squeezed state of a dissipative system. Background technique [0002] The atomic frequency standard uses the frequency of the atomic energy level transition as a reference to measure time, and can obtain a high-precision time standard. Among the seven basic physical quantities of the new international system of units, the other six international units except mole are all based on "seconds". The precise measurement of time plays an important role in the innovation of international measurement technology, the development of national society and national defense. important role. [0003] A dissipative system is an open quantum system that eventually reaches an equilibrium state after exchanging energy with the outside world. In the actual quantum measurement technology, the state of atoms or ions is inevitably affected by the ext...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/26
CPCH03L7/26
Inventor 陈星薛潇博张升康赵环王暖让张璐葛军
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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