Non-equilibrium dynamics induced by miscible-immiscible transition in binary Bose-Einstein condensates

TL;DR

This paper investigates the non-equilibrium dynamics of binary Bose-Einstein condensates during a controlled transition from immiscible to miscible states, revealing oscillatory behavior influenced by energy differences.

Contribution

It introduces a novel technique to control the miscibility and spatial configurations of binary Bose-Einstein condensates through internal state manipulation.

Findings

Oscillation of spatial structures observed during transition.

Higher total energy correlates with increased oscillation frequency.

Controlled transition enables manipulation of condensate spatial degrees of freedom.

Abstract

The non-equilibrium spatial dynamics in a two-component Bose-Einstein condensate were excited by controlled miscible-immiscible transition, in which immiscible condensates with domain structures are transferred to the miscible condensates by changing the internal state of 87Rb atoms. The subsequent evolution exhibits the oscillation of spatial structures involving component mixing and separation. We show that the larger total energy of the miscible system results in a higher oscillation frequency. This investigation introduces a new technique to control the miscibility and the spatial degrees of freedom in atomic Bose-Einstein condensates.