Work

Enhanced localization in the prethermal regime of continuously measured many-body localized systems

Year: 2024

Type: article

Abstract: Many-body localized systems exhibit a unique characteristic of avoiding thermalization, primarily attributed to the presence of a local disorder potential in the Hamiltonian. In recent years there has been an interest in simulating these systems on quantum devices. However, actual quantum devices are subject to unavoidable decoherence that can be modeled as coupling to a bath or continuous measurements. The quantum Zeno effect is also known to inhibit thermalization in a quantum system, where repeated measurements suppress transport. In this work we study the interplay of many-body localization and the many-body quantum Zeno effect. In a prethermal regime, we find that signatures of many-body localization are enhanced when the system is coupled to a bath that contains measurements of local fermion population, subject to the appropriate choice of system and bath parameters.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.110.184211

Authors: Kristian Patrick, Qinghong Yang, Dong E. Liu

Institutions: Beijing Academy of Quantum Information Sciences, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Frontier Science Center for Quantum Information of the Ministry of Education of China

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Natural Science Foundation of Beijing Municipality, Wu Jieping Medical Foundation

Awards: G3888669666, G5348083938, G8104489813, G8600829791