Disorder-Induced Order in Two-Component Bose-Einstein Condensates

TL;DR

This paper demonstrates that disorder, via random Raman coupling, can induce a stable relative phase in two-component Bose-Einstein condensates across multiple dimensions, with potential applications in phase control of ultracold gases.

Contribution

It introduces a novel disorder-induced order mechanism in two-component BECs, extending concepts from XY spin models to ultracold atomic systems.

Findings

Random Raman coupling induces a pi/2 phase difference.

The effect is robust across 1D, 2D, and 3D systems.

The phenomenon persists at small finite temperatures.

Abstract

We propose and analyze a general mechanism of disorder-induced order in two-component Bose-Einstein condensates, analogous to corresponding effects established for XY spin models. We show that a random Raman coupling induces a relative phase of pi/2 between two BECs and that the effect is robust. We demonstrate it in 1D, 2D and 3D at T=0 and present evidence that it persists at small T>0. Applications to phase control in ultracold spinor condensates are discussed.