Tanzi L, Lucioni E, Famà F, Catani J, Fioretti A, Gabbanini C, Bisset R N, Santos L, Modugno G
CNR-INO, Sede Secondaria "Adriano Gozzini," via Moruzzi 1, 56124 Pisa, Italy.
LENS and Dipartimento di Fisica e Astronomia, Università di Firenze, 50019 Sesto Fiorentino, Italy.
Phys Rev Lett. 2019 Apr 5;122(13):130405. doi: 10.1103/PhysRevLett.122.130405.
The competition of dipole-dipole and contact interactions leads to exciting new physics in dipolar gases, well illustrated by the recent observation of quantum droplets and rotons in dipolar condensates. We show that the combination of the roton instability and quantum stabilization leads under proper conditions to a novel regime that presents supersolid properties due to the coexistence of stripe modulation and phase coherence. In a combined experimental and theoretical analysis, we determine the parameter regime for the formation of coherent stripes, whose lifetime of a few tens of milliseconds is limited by the eventual destruction of the stripe pattern due to three-body losses. Our results open intriguing prospects for the development of long-lived dipolar supersolids.
偶极 - 偶极相互作用和接触相互作用的竞争在偶极气体中引发了令人兴奋的新物理现象，最近在偶极凝聚体中对量子液滴和旋子的观测很好地说明了这一点。我们表明，在适当条件下，旋子不稳定性和量子稳定性的结合会导致一种新的状态，由于条纹调制和相位相干的共存而呈现出超固体性质。在结合实验和理论的分析中，我们确定了形成相干条纹的参数范围，其几十毫秒的寿命受到三体损失导致条纹图案最终破坏的限制。我们的结果为长寿命偶极超固体的发展开辟了有趣的前景。
