New state of matter in one-dimensional quantum gas

Phys.orgĀ  January 14, 2021
Long-lived excited states of interacting quantum systems that retain quantum correlations and evade thermalization are of great fundamental interest. A team of researchers in the US (Stanford University, City University of New York) created nonthermal states in a bosonic one-dimensional (1D) quantum gas of dysprosium by stabilizing a super-Tonks-Girardeau gas against collapse and thermalization with repulsive long-range dipolar interactions. Stiffness and energy-per-particle measurements show that the system is dynamically stable regardless of contact interaction strength. This enables us to cycle contact interactions from weakly to strongly repulsive, then strongly attractive, and finally weakly attractive. They showed that it is an energy-space topological pump (caused by a quantum holonomy). Iterating the cycle offers an unexplored topological pumping method to create a hierarchy of increasingly excited prethermal states…read more. TECHNICAL ARTICLE

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