Coupled eigenmodes in a two-component Bose-Einstein condensate
P. Ohberg, S. Stenholm
TL;DR
This paper investigates the elementary excitation modes in a two-component Bose-Einstein condensate, revealing phenomena like avoided crossings and mode decoupling at high interactions, with detailed analysis of eigenmodes.
Contribution
It provides a detailed analysis of the eigenmodes in two-component BECs, highlighting mode interactions and decoupling phenomena not extensively studied before.
Findings
Identification of avoided crossings in excitation spectra
Regions of coalescing oscillations with same frequency
Decoupling of modes at large repulsive interactions
Abstract
We have studied the elementary excitations in a two-component Bose-Einstein condensate. We concentrate on the breathing modes and find the elementary excitations to possess avoided crossings and regions of coalescing oscillations where both components of the condensates oscillate with same frequency. For large repulsive interactions between the condensates, their oscillational modes tend to decouple due to decreased overlap. A thorough investigation of the eigenmodes near the avoided crossings is presented.
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