Speaker: 
Nicolo Defenu  - ETH Zurich

Title: 
Quantum criticality and out-of-equilibrium scaling long-range systems and beyond

Abstract:
The seminar is meant to present a bird's eye view on the field of long-range interacting quantum systems. The talk will start with a brief overview of critical phenomena in systems with power law interactions 1/r^alpha at alpha < d showing how the equilibrium scaling depends of the power-law scaling alpha. Then, I will describe the peculiar out-of-equilibrium scaling dynamics observed in ""strong"" long-range systems with alpha < d, both for sudden and slow quenches. Finally, I will deal with the seemingly unconnected case of 2-components fermi gases confined in 2D traps. The connection between this topic and the previous studies of long-range interactions will be outlined.

[1] ND, T. Enss, M. Kastner, and G. Morigi Phys. Rev. Lett. 121, 240403 (2018).
[2] P. A. Murthy*, ND*, L. Bayha, M. Holten, P. M. Preiss, T. Enss, S. Jochim, Science 365, 268-272 (2019).
[3] ND, Proc. Nat. Acad. Sci. 118, e2101785118 (2021).

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QuCoLiMa Talks are the weekly seminar of the collaborative research center TRR 306 QuCoLiMa (Quantum Cooperativity of Light and Matter). The talks are given by (external) experts, whose research falls within the scope of QuCoLiMa.

More information at www.qucolima.de/talks