We propose a method to prepare states of given quantized circulation in annular Bose-Einstein condensates (BEC) confined in a ring trap using the method of phase imprinting without relying on a two-photon angular momentum transfer. The desired phase profile is imprinted on the atomic wave function using a short light pulse with a tailored intensity pattern generated with a Spatial Light Modulator. We demonstrate the realization of 'helicoidal' intensity profiles suitable for this purpose. Due to the diffraction limit, the theoretical steplike intensity profile is not achievable in practice. We investigate the effect of imprinting an intensity profile smoothed by a finite optical resolution onto the annular BEC with a numerical simulation of the time-dependent Gross-Pitaevskii equation. This allows us to optimize the intensity pattern for a given target circulation to compensate for the limited resolution.
Spontaneous generation, enhanced propagation and optical imprinting of quantized vortices and dark solitons in a polariton superfluid: towards the control of quantum turbulence
Angular momentum of rotating fermionic superfluids by Sagnac phonon interferometry
European Laboratory for Nonlinear Spectroscopy (LENS), University of Florence（欧洲非线性光谱学实验室，佛罗伦萨大学）；Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (CNR-INO)（意大利国家光学研究所）；INFN, Sezione di Firenze（意大利国家核物理研究所，佛罗伦萨分部）；Department of Physics, University of Florence（佛罗伦萨大学物理系）
Institut für Experimentalphysik, Universität Innsbruck（因斯布鲁克大学实验物理研究所）；Pitaevskii BEC Center, CNR-INO and Dipartimento di Fisica, Università di Trento（特伦托大学物理系与CNR-INO皮塔耶夫斯基玻色-爱因斯坦凝聚中心）；INFN, Laboratori Nazionali del Gran Sasso（意大利国家核物理研究所大萨索国家实验室）；Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften（奥地利科学院量子光学与量子信息研究所）
Supersolid Rotation in an Annular Bose-Einstein Condensate coupled to a Ring Cavity
Indian Institute of Technology Guwahati（印度理工学院古瓦哈提分校）；Rochester Institute of Technology（罗切斯特理工学院）；Max Planck Institute for the Science of Light（马克斯·普朗克光科学研究所）
