Regensburg 2025 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster: Quantum Dynamics and Many-body Systems

DY 29.6: Poster

Wednesday, March 19, 2025, 15:00–18:00, P4

Enhancing quantum metric using periodic driving — •Dhruv Tiwari, Roderich Moessner, and Johannes S. Hofmann — Max Planck Institute for Physics of Complex Systems, Nöthnitzer Str., 01187, Dresden

The advent of periodically driven systems has revolutionized modern condensed matter physics by offering two transformative opportunities. First, they allow the realization of nonequilibrium analogs of well-established equilibrium phases under highly tunable conditions. Second, they facilitate the emergence of novel phases with no equilibrium counterparts. In this work, we focus on the former, leveraging the tunable parameters of periodically driven systems to enhance the quantum metric in flat-band systems. The quantum metric, a fundamental geometric property of the band structure, plays a critical role in the formation of superconductivity in flat-band systems with attaractive density interactions. Here, we present preliminary results demonstrating how the interplay between periodic driving and electron correlations can amplify the quantum metric, leading to enhanced physical properties compared to the equilibrium case. These findings pave the way for designing engineered quantum states and exploring the interplay of nonequilibrium dynamics and strong correlations in flat-band systems.

Keywords: Floquet Systems; Quantum Metric; Flat Band Systems; Superconductivity