Laser-catalyzed Domain Formation In Spinor-1Bose Condensates

Since the proposing of Bose-Einstein condensate theory, to the successful formation of BEC inexperiment in the late19th century, studies concerning Bose-Einstein condensation have always been themost fascinating field of interest in physics. Due to various attempts to acquire BEC, multiple advancedexperimental techniques have been developed, especially the method to capture and cool atoms with laser,which has changed the focus of the experimental research till then. with people’s deepening understandingabout atomic structure and laser, photoassociation technology has come into being, which adopts laser tomake the atoms form molecules. The formation of BEC helped people to learn more about the internalstructure of atoms, thus opening up research areas of super chemistry, which in turn changed the situationthat some molecules could not be prepared by mere chemical reaction and therefore set a new horizon formolecule preparation and research. Meanwhile, with the preparation of spinor BEC, people began to beable to study the internal ferromagnetic properties of BEC. Further development of spin moment andmolecular reaction dynamics provided processing tools for the study of BEC internal magnetic domainstructure. At present, multiple research in this field has made very great progress, such as spin mixingdynamics, optical effect, magnetic domain structure, etc. At present, in addition to the super chemistry fieldthe Photoassociation technique has been vastly adopted to spinor BEC, unfolding a variety of uniquephenomena.This paper theoretically elaborates on the formation of the main laboratory equipment of BECexperiments, theoretical reasons and specific experimental method steps, describes the processes of theformation of BEC and illustrates theoretically that controlling spinor-187RbBEC by using opticalassociative method can change the part of the spin moment of atoms inside BEC, thus proving thefeasibility of the formation of magnetic domains by controlling the light field inside BEC and achievingBose-Einstein condensate with internal degrees of freedom. This paper presents a model to characterizethe symmetry breaking of spinor-1BEC (M F1) with PA interactions, placing spinor-1BEC in the PAlight field. We find that the dynamical process of the domain formation can be greatly controlled by the PAfield. The PA field can enhance or suppress the spatial separation of domains, which can provide a flexible tool to modulate the domain structure and indicate an interesting research field of laser-catalyzed in spinorcondensate, bridging atoms and molecules with disciplines such as optics, matter waves, many-bodyphysics, and even quantum information science.