Dysprosium Lab
We study dipolar supersolids and novel quantum phases with magnetic cold atoms.
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Our institutions
LENS
LENS
LENS was born as an European scientific research centre providing advanced laser and spectroscopic facilities for researchers from European countries and promoting and facilitating the exchange of ideas, scientific techniques, and technical skills. Several European universities have participated in the organization of LENS, through agreements with the University of Florence. LENS is directed by an Executive Council, nominated by the participating European institutions, that elects the Director and the Associate Director. The Executive Council is assisted in the planning of the scientific program of LENS by a Scientific Advisory Board, formed by an international panel of experts. The senior research staff of LENS consists of professors from the university of Florence and from other associated universities.
CNR-INO
CNR-INO
Our papers
[preprint] Self-induced Josephson oscillations and MQST in supersolids
[preprint] Self-induced Josephson oscillations and MQST in supersolids
The Josephson effect characterizes superfluids and superconductors separated by a weak link, the so-called Josephson junction. A recent experiment has shown that Josephson oscillations can be observed also in a supersolid, where the weak link is not due to an external barrier, but is self-induced by interparticle interactions. Here we show theoretically that supersolids -- despite their self-induced character -- feature all the standard properties of bosonic Josephson junction arrays, including macroscopic quantum self-trapping. We focus on the harmonically trapped dipolar supersolids of interest for current experiments, and show that they can be described with a generalized Josephson model that takes into account spatial inhomogeneities. Our work shades new light on the dynamics of supersolids and opens the way to the study of a novel class of Josephson junctions.
Measure of the superfluid fraction via Josephson effect
Measure of the superfluid fraction via Josephson effect
A new method based on the Josephson effect is described, allowing to measure the superfluid fraction of a supersolid, which captures the effect of spatially periodic modulation leading to reduction in the stiffness of superfluids.
Blue repulsive potential for dysprosium
Blue repulsive potential for dysprosium
Short-wavelength repulsive potentials for quantum gases allow one to realize new systems and to study new phenomena. Here we report the realization of repulsive optical potentials for dysprosium atoms in the blue region of the spectrum, at wavelengths close to 400 nm. We employ a spectrally filtered diode laser system to measure both scalar and tensorial components of the polarizability of dysprosium, which we find in good agreement with the theoretical predictions. We demonstrate the implementation of potential strengths appropriate to manipulate Bose-Einstein condensates, with scattering-limited lifetimes exceeding 1 s. This type of optical potential opens interesting directions for the study of dipolar superfluids and supersolids.
Dynamics across the supersolid phase transition
Dynamics across the supersolid phase transition
Superfluid-supersolid quantum phase transition
Superfluid-supersolid quantum phase transition
The quantum phase transition from superfluid to supersolid resembles ordinary crystallization transitions but with important distinctions that reflect peculiarities of supersolids.
Dipolar supersolid under rotation
Dipolar supersolid under rotation
Double spontaneous symmetry breaking
Double spontaneous symmetry breaking
Two distinct compressional oscillation modes are characterized in a dipolar Bose–Einstein condensate; this demonstrates the breaking of two symmetries owing to the coexisting superfluid and crystal properties of a supersolid.
Metastable supersolid properties
Metastable supersolid properties
Broad Feshbach resonances dipolar gas
Broad Feshbach resonances dipolar gas
A new setup for Dy
A new setup for Dy
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