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September 11, 2020Physical review. A/Physical review, A105 citationsOpen Access

Measurement-induced transitions of the entanglement scaling law in ultracold gases with controllable dissipation

SGShimpei GotoIDIppei Danshita

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Abstract

Recent studies of quantum circuit models have theoretically shown that frequent measurements induce a transition in a quantum many-body system, which is characterized by a change in the scaling law of the entanglement entropy from a volume law to an area law. In order to propose a way to experimentally observe this measurement-induced transition, we present numerical analyses using matrix-product states on the quench dynamics of a dissipative Bose-Hubbard model with controllable two-body losses, which has been realized in recent experiments with ultracold atoms. We find that when the strength of dissipation increases, there occurs a measurement-induced transition from volume-law scaling to area-law scaling with a logarithmic correction in a region of relatively small dissipation. We also find that the strong dissipation leads to a revival of the volume-law scaling due to a continuous quantum Zeno effect. We show that dynamics starting with the area-law states exhibits strong suppression of particle transport stemming from ergodicity breaking, which can be used in experiments to distinguish them from the volume-law states.

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Cite This Study

Goto et al. (2020) studied this question.

synapsesocial.com/papers/6a1bc131bc71fb1015a8ecfbhttps://doi.org/10.1103/physreva.102.033316
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