Preparation Of Macroscopic Quantum Superposition State In A Two-mode Crossed Kerr-type Coupling System

Quantum superposition is the core of quantum theory and is considered to be the mark that distinguishes quantum from the classical world.With the in-depth research and continuous progress of science and technology,the veil of quantum physics is unveiled layer by layer.So far,through the continuous efforts and exploration of scientists,quantum superposition has been observed in many physical systems in micro and mesoscopic.The development of microfabrication technology in recent years has laid the foundation for observing and using quantum effects in macro mechanical systems.However,because quantum superposition states are affected by thermal fluctuations and quantum decoherence,the boundaries between quantum effects and classical physics are still blurred.How to observe quantum superposition states in macro-mechanical systems is still a challenge.In recent years,many scholars have devoted themselves to the research in this area,and have put forward various proposals to solve this problem,and have made a lot of progress.This paper proposes a scheme for the preparation of macroscopic quantum superposition states using a dual-mode cross Kerr-type coupled optical power system.This article first briefly introduces the related research progress of the optical power system,as well as some basic theoretical knowledge related to the research of this article.Second,we considered an atomic-optical system consisting of a two-level atom,an optical cavity,and a mechanical vibrator.The optical cavity contains a fixed mirror and a movable mirror.The two-level atom is placed in the optical cavity.The interaction is described by the Jaynes-Cummings model,and is a strong coupling;the movable mirror and the light field are coupled by radiation-pressure interaction,that is,the optomechanical coupling;between the two modes of the single-mode mechanical oscillator and the single-mode cavity field The interaction adopts dual-mode cross-kerr interaction coupling.Through analysis,it is found that the cross Kerr effect can amplify the displacement of the mechanical oscillator,and when the coupling coefficient approaches the vibration frequency of the mechanical oscillator,a distinguishable macroscopic quantum superposition state of the mechanical oscillator can be prepared.