Morphology of an interacting three-dimensional trapped Bose-Einstein condensate from many-particle variance anisotropy

• URL: http://arxiv.org/abs/2106.07001v1
• Date: Sun, 13 Jun 2021 14:19:08 GMT
• Title: Morphology of an interacting three-dimensional trapped Bose-Einstein condensate from many-particle variance anisotropy
• Authors: Ofir E. Alon
• Abstract summary: variance of position operator is associated with how wide or narrow a wave-packet is. momentum variance is correlated with the size of a wave-packet in momentum space. angular-momentum variance quantifies to what extent a wave-packet is non-spherically symmetric.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The variance of the position operator is associated with how wide or narrow a wave-packet is, the momentum variance is similarly correlated with the size of a wave-packet in momentum space, and the angular-momentum variance quantifies to what extent a wave-packet is non-spherically symmetric. We examine an interacting three-dimensional trapped Bose-Einstein condensate at the limit of an infinite number of particles, and investigate its position, momentum, and angular-momentum anisotropies. Computing the variances of the three Cartesian components of the position, momentum, and angular-momentum operators we present simple scenarios where the anisotropy of a Bose-Einstein condensate is different at the many-body and mean-field levels of theory, despite having the same many-body and mean-field densities per particle. This suggests a way to classify correlations via the morphology of 100\% condensed bosons in a three-dimensional trap at the limit of an infinite number of particles. Implications are briefly discussed.

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