Work

Synchronized Spin Trajectories under Collective Weak Measurements

Year: 2026

Type: preprint

Abstract: We consider locally driven-dissipative quantum spins that undergo a continuous weak measurement of their collective spin. We show that such a system can exhibit full spin-synchronization in trajectories corresponding to the same measurement record. Mathematically, we demonstrate that this is a general consequence of the irreducibility of the quantum Markov semigroup generated by the Lindbladian, in combination with a transitive symmetry, in particular spin-permutation symmetry. When breaking the irreducibility, e.g. in the absence of local dissipation, the system can exhibit a weaker form of partial synchronization. Given the general origin, this measurement-induced phenomenon arises in a broad class of many-body systems.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2609.12736

Authors: Han, Yiwen, Sun, Konghao, Yi, Wei, Schachenmayer, Johannes

Institutions: Centre National de la Recherche Scientifique, Institut de Science et d'Ingénierie Supramoléculaires, Université de Strasbourg, Chinese Academy of Sciences, Institute of Physics

Language: English

Topic: Quantum Mechanics and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Award: G8824177283

OpenAlex ID: W7212501287

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