Our work on Bloch oscillations without a lattice in the Yang-Gaudin model is in PRL!

S. Scopa, P. Zechmann, M. Knap, J. De Nardis, A. Bastianello, Phys. Rev. Lett. 137, 113404  (2026)

The joint experimental-theoretical effort with Innsbruck University and the University of Amsterdam has finally been published in Nature Communications.

 Horvath, A. Bastianello, S. Dhar, R. Koch, Y. Guo, J.S. Caux, M. Landini, H.C. Nägerl, Nat Commun (2026). 

At equilibrium, bosons with attractive interactions tend to condense in real space and eventually collapse, due to the formation of large aggregates with augmented many-body losses. But what about far from equilibrium?

Ultracold Cesium atoms in a one-dimensional optical lattice are described by the Lieb-Liniger model, which is integrable and evades thermalization. With a gentle sweep of interactions from repulsive to attractive, we excite a metastable gas of bound states (Bethe strings) far from equilibrium, and compare experimental data with Generalized Hydrodynamics with great agreement.

For the first time, we experimentally demonstrate the ballistic rescaling of correlation functions in integrable models.

Optical fibers offer a realization of the focusing (attractive) NonLinear Schroedinger equation with the possibility of non-destructive and spatially resolved measurements, which enabled the full characterization of correlation functions. Experimental data are well described by theoretical predictions from Generalized Hydrodynamics and Soliton Gases.

E. Charnay, A. Escoubet, F. Copie, S. Randoux, T. Bonnemain, A. Bastianello, P. Suret, Phys. Rev. Lett. 137, 097202 (2026)

Our work on anomalous spin transport in the easy-axis XXZ chain has been published in Physical Review Letters

T. Yoshimura, Ž. Krajnik, A. Bastianello, E. Ilievski6, Phys. Rev. Lett. 137, 086302 (2026)

We use ballistic macroscopic fluctuation theory to analytically demonstrate the emergence of a "nested-Gaussian" distribution for the typical fluctuations of the integrated spin current. We hope that these results can be seminal to investigating the even more exotic Heisenberg chain, featuring superdiffusion and an elusive connection with the KPZ universality class