2018/07/31 by Shuyang Cao, Pengju Tang, Xinxin Guo +3
Physics and Astronomy · #A priori and a posteriori #Cold Atom Physics and Bose-Einstein Condensates #Data processing #Mechanical and Optical Resonators #Noise (video) #Optical lattice #Principal component analysis #Quantum #Quantum fluctuation #Quantum information processing #Quantum many-body systems #Quantum noise #Ultracold atom #cond-mat.quant-gas #physics.data-an
paper · pdf · doi:10.1364/oe.27.012710
7 pages, 7 figures
openalex created_date 2018/07/19 · arxiv created 2018/12/24 · openalex publication_date 2019/04/22 · arxiv updated 2019/05/22 · openalex updated_date 2026/08/05
To extract useful information about quantum effects in cold atom experiments, one central task is to identify the intrinsic fluctuations from extrinsic system noises of various kinds. As a data processing method, principal component analysis can decompose fluctuations in experimental data into eigenmodes, and give a chance to separate noises originated from different physical sources. In this paper, we demonstrate for Bose-Einstein condensates in one-dimensional optical lattices that the principal component analysis can be applied to time-of-flight images to successfully separate and identify noises from different origins of leading contribution, and can help to reduce or even eliminate noises via corresponding data processing procedures. The attribution of noise modes to their physical origins is also confirmed by numerical analysis within a mean-field theory. As the method does not rely on any a priori knowledge of the system properties, it is potentially applicable to the study of other quantum states and quantum critical regions.