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A: Fachverband Atomphysik

A 28: Ultra-cold Plasmas and Rydberg Systems II (joint session A/Q)

A 28.6: Talk

Thursday, March 5, 2026, 12:45–13:00, N 2

Probing localization in a bond-disordered power-law interacting system using time-reversal based protocols — •Eduard Jürgen Braun, Matthias Lotze, Adrian Braemer, Gerhard Zürn, and Matthias Weidemüller — Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg

Quantum thermalization raises intriguing questions about the fate of isolated many-body systems. In conventional one-dimensional systems at finite system size, many-body localization (MBL) appears to defy thermalization, often understood through the emergent integrability encoded in local integrals of motion (LIOMs). However, in systems with long-ranged power-law interactions, the standard LIOM picture is not expected to hold, and recent studies in a bond-disordered model have revealed level statistics markedly different from standard MBL systems. Here, we investigate whether time-reversal-based methods, such as Loschmidt echoes, can uncover distinctive signatures of localization in these bond-disordered power-law interacting systems. Our results suggest that localization in such systems is qualitatively different from conventional MBL, providing new insights into the interplay of disorder and long-ranged interactions.

Keywords: long-range interactions; many-body localization