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- W4385954927 abstract "Monitored quantum circuits exhibit entanglement transitions at certain measurement rates. Such a transition separates phases characterized by how much information an observer can learn from the measurement outcomes. We study SU(2)-symmetric monitored quantum circuits, using exact numerics and a mapping onto an effective statistical-mechanics model. Due to the symmetry's non-Abelian nature, measuring qubit pairs allows for nontrivial entanglement scaling even in the measurement-only limit. We find a transition between a volume-law entangled phase and a critical phase whose diffusive purification dynamics emerge from the non-Abelian symmetry. Additionally, we identify a ``spin-sharpening transition.'' Across the transition, the rate at which measurements reveal information about the total spin quantum number changes parametrically with system size." @default.
- W4385954927 created "2023-08-18" @default.
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- W4385954927 date "2023-08-17" @default.
- W4385954927 modified "2023-10-10" @default.
- W4385954927 title "Critical phase and spin sharpening in SU(2)-symmetric monitored quantum circuits" @default.
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- W4385954927 doi "https://doi.org/10.1103/physrevb.108.054307" @default.
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