Er-Dy Scientific News

Category for scientific news of the Er-Dy group

Lifecycle of a Supersolid Featured in APS Physics Viewpoint and Physics World

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Congratulation to Max, Claudia, Lauritz, Lauriane, Manfred and Matt for their experimental work

on the lifecycle of a supersolid, which has been just published in Phys. Rev. Lett..

The paper got selected as Editors’ Suggestion by APS and featured in Physics Viewpoint and in Physics World.

Read More:

Research News: Physics Viewpoint article by Chinmayee Mishra, entitled  “Cooling a Thermal Cloud to a Supersolid”.

Research News: Physics World article by Oliver Stockdale, entitled “High-resolution imaging sheds light on supersolid formation”

Reference:

Birth, Life, and Death of a Dipolar Supersolid

Maximilian Sohmen, Claudia Politi, Lauritz Klaus, Lauriane Chomaz, Manfred J. Mark, Matthew A. Norcia, and Francesca Ferlaino

Phys. Rev. Lett. 126, 233401 (2021)

Published June 7, 2021

Birth, life, and death of a dipolar supersolid

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In the short time since the first observation of supersolid states of ultracold dipolar atoms, substantial progress has been made in understanding the zero-temperature phase diagram and low-energy excitations of these systems. Less is known, however, about their finite-temperature properties, particularly relevant for supersolids formed by cooling through direct evaporation. 

In this new experimental work, we explore this realm by characterizing the evaporative formation and subsequent decay of a dipolar supersolid by combining high-resolution in-trap imaging with time-of-flight observables.  As our atomic system cools towards quantum degeneracy, it first undergoes a transition from thermal gas to a crystalline state with the appearance of periodic density modulation.  This is followed by a transition to a supersolid state with the emergence of long-range phase coherence. Further, we explore the role of temperature in the development of the modulated state.

 

 

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Phase coherence in out-of-equilibrium supersolid states of ultracold dipolar atoms

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Now in Nature Physics!

Supersolids are fluid and solid at the same time. In jointly collaboration work, together with Thierry Giamarchi, theoretical physicist from the University of Geneva, we have for the first time investigated what happens when such a state is brought out of balance.

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First Dipolar Quantum Mixtures!

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We have created for the first time a dipolar quantum mixture by combining two highly magnetic atomic species, Erbium and Dysprosium. The experiment has been conducted in the RARE Lab and we observe simultaneous quantum degeneracy of 5 Bose-Bose mixture and a Bose-Fermi one.

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