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Coherent oscillations in small Fermi-polaron systems
(AMER PHYSICAL SOC, 2017-12-01)
Article
Open AccessWe study the ground state and excitations of a one-dimensional trapped polarized Fermi gas interacting with a single impurity. First, we study the tunneling dynamics of the impurity through a potential barrier, such as one ... -
Effect of risk perception on epidemic spreading in temporal networks
(American Chemical Society (ACS), 2018-01-31)
Article
Open AccessMany progresses in the understanding of epidemic spreading models have been obtained thanks to numerous modeling efforts and analytical and numerical studies, considering host populations with very different structures and ... -
Effects of heterogeneous social interactions on flocking dynamics
(2018-02-08)
Article
Open AccessSocial relationships characterize the interactions that occur within social species and may have an important impact on collective animal motion. Here, we consider a variation of the standard Vicsek model for collective ... -
Bose polarons at finite temperature and strong coupling
(2018-02-01)
Article
Open AccessA mobile impurity coupled to a weakly interacting Bose gas, a Bose polaron, displays several interesting effects. While a single attractive quasiparticle is known to exist at zero temperature, we show here that the spectrum ... -
Vortex dynamics in coherently coupled Bose-Einstein condensates
(AMER PHYSICAL SOC, 2017)
Article
Restricted access - publisher's policyIn classical hydrodynamics with uniform density, vortices move with the local fluid velocity. This description is rewritten in terms of forces arising from the interaction with other vortices. Two such positive straight ... -
Repulsive Fermi polarons in a resonant mixture of ultracold 6Li atoms
(2017)
Article
Open AccessWe employ radio-frequency spectroscopy to investigate a polarized spin mixture of ultracold 6 Li atoms close to a broad Feshbach scattering resonance. Focusing on the regime of strong repulsive interactions, we observe ... -
Universality of the unitary Fermi gas: A few-body perspective
(2017)
Article
Open AccessWe revisit the properties of the two-component Fermi gas with short-range interactions in three dimensions, in the limit where the s -wave scattering length diverges. Such a unitary Fermi gas pos- sesses universal thermodynamic ... -
Detection of Zak phases and topological invariants in a chiral quantum walk of twisted photons
(2017)
Article
Open AccessTopological insulators are fascinating states of matter exhibiting protected edge states and robust quantized features in their bulk. Here we propose and validate experimentally a method to detect topological properties ... -
Measuring Chern numbers in Hofstadter strips
(2017-08-15)
Article
Open AccessTopologically non-trivial Hamiltonians with periodic boundary conditions are characterized by strictly quantized invariants. Open questions and fundamental challenges concern their existence, and the possibility of measuring ... -
Few trapped quantum dipoles: quantum versus classical structures
(2018-01-31)
Article
Open AccessWe analyze the ground state of a two-dimensional quantum system of a few strongly confined dipolar bosons. Dipoles arrange in different stable structures that depend on the tilting polarization angle and the anisotropy of ... -
Andreev-Bashkin effect in superfluid cold gases mixtures
(2017-12-05)
Article
Open Access© 2017 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische Gesellschaft. We study a mixture of two superfluids with density-density and current-current (Andreev-Bashkin) interspecies interactions. ... -
Observation of dynamic atom-atom correlation in liquid helium in real space
(2017-05-04)
Article
Open Access© The Author(s) 2017. Liquid 4He becomes superfluid and flows without resistance below temperature 2.17 K. Superfluidity has been a subject of intense studies and notable advances were made in elucidating the phenomenon ...
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