Engineering Dynamical Phase Diagrams with Driven Lattices in Spinor Gases

TL;DR

This paper demonstrates how driven lattices can be used to precisely control and explore the phase diagrams of spinor gases, enabling new studies of dynamical phase transitions with potential applications in quantum sensing.

Contribution

It introduces a method to engineer dynamical phase diagrams in spinor gases using driven lattices, allowing control over multiple parameters with minimal heating or atom loss.

Findings

Expanded magnetic field range for spin dynamics

Enhanced sensitivity at higher harmonics

Creation of additional phase space separatrices

Abstract

We experimentally demonstrate that well-designed driven lattices are versatile tools to simultaneously tune multiple key parameters (namely spin-dependent interactions, spinor phase, and Zeeman energy) for manipulating phase diagrams of spinor gases with negligible heating and atom losses. This opens a new avenue for studying dynamical phase transitions in engineered Hamiltonians. The driven lattice creates additional separatrices in phase space at driving-frequency-determined locations, with progressively narrower separatrices at higher Zeeman energies due to modulation-induced higher harmonics. The vastly expanded range of magnetic fields at which significant spin dynamics occur and improved sensitivities at higher harmonics represent a step towards quantum sensing with ultracold gases.