Supersolid formation time shortcut and excitation reduction by manipulating the dynamical instability

TL;DR

This paper proposes experimental protocols to reduce excitation and shorten formation time of supersolids by manipulating dynamical instabilities, specifically through the Parachutejump and Bang-Bang schemes, validated via extended Gross Pitaevskii theory.

Contribution

It introduces novel schemes for supersolid formation control, improving upon previous methods by effectively reducing excitation and formation time during phase transitions.

Findings

Parachutejump scheme reduces excitation during phase transition

Bang-Bang method shortens supersolid formation time

Mechanical noise impacts phase transition dynamics

Abstract

Supersolids are a phase of matter exhibiting both superfluidity and a periodic density modulation typical of crystals. When formed via quantum phase transition from a superfluid, they require a formation time before their density pattern develops. Along this paper some protocols/schemes are proposed for experimental applications, building on earlier descriptions of the role roton instability plays in the supersolid formation process and the associated formation time. In particular, the Parachutejump scheme sought to lessen the excitation produced when crossing the phase transition, and the Bang-Bang method sought to shorten the formation time. As a case study of the impact that mechanical fluctuations (noise) can have on the phase transition when conducting an experiment, the impact of a mechanical kick before the transition is also investigated. The proposed schemes are able to fulfill their objectives successfully as both the shortening of the formation process and the reduction of excitation are achieved within the framework of extended Gross Pitaevskii theory.