Quantum fluctuations of zero-modes for trapped two-component Bose-Einstein condensates

Junichi Takahashi*, Yuto Hayaki, Yoshiya Yamanaka

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Zero-mode operators associated with a spontaneous breakdown of internal symmetry are often suppressed and their quantum fluctuations are neglected owing to the absence of a definite criterion for determining the ground state and infrared divergences in physical quantities. Because the zero-mode fluctuations for systems with finite-size and spatially inhomogeneity cannot be neglected, we have proposed a novel treatment of the zero-mode for finite systems, which helps determine the unique ground state and evaluate the physical quantities without divergence. Following the proposed treatment, we consider trapped systems with two-component Bose-Einstein condensates. The results obtained demonstrate that the interaction strength between the two components considerably affect the dynamical properties, illustrating the importance of the zero-mode for finite systems.

Original languageEnglish
Title of host publicationProceedings of the 14th Asia Pacific Physics Conference
EditorsTeck-Yong Tou, Jun'ichi Yokoyama, Roslan Abdul Shukor, Kazuhiro Tanaka, Hyoung Joon Choi, Ryoji Matsumoto, Oi-Hoong Chin, Jia Hou Chin, Kuru Ratnavelu
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735440630
Publication statusPublished - 2021 Feb 5
Event14th Asia Pacific Physics Conference, APPC 2019 - Kuching, Sarawak, Malaysia
Duration: 2019 Nov 172019 Nov 22

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference14th Asia Pacific Physics Conference, APPC 2019
CityKuching, Sarawak

ASJC Scopus subject areas

  • General Physics and Astronomy


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