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Entanglement Holography in Quantum Phases via Twisted R\'enyi-N Correlators

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arxiv 2506.10076 v1 pith:Q4YL4ZE3 submitted 2025-06-11 cond-mat.str-el quant-ph

classification cond-mat.str-elquant-ph
keywords entanglementenyi-nphasestwisteddensitymatrixquantumreduced
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abstract

We introduce a holographic framework for the entanglement Hamiltonian in symmetry-protected topological (SPT) phases with area-law entanglement, whose reduced density matrix $\rho \propto e^{-H_e}$ can be treated as a lower-dimensional mixed state. By replicating $\rho$, we reconstruct the fixed-point SPT wavefunction, establishing an exact correspondence between the bulk strange correlator of the (d+1)-dimensional SPT state and the twisted R\'enyi-N operator of the d-dimensional reduced density matrix. Notably, the reduced density matrix exhibits long-range or quasi-long-range order along the replica direction, revealing a universal entanglement feature in SPT phases. As a colloary, we generalized the framework of twisted R\'enyi-N correlator to thermal states and open quantum systems, providing an alternative formulation of the Lieb-Schultz-Mattis theorem, applicable to both closed and open systems. Finally, we extend our protocol to mixed-state SPT phases and introduce new quantum information metrics -- twisted R\'enyi-N correlators of the surgery operator -- to characterize the topology of mixed states.

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  1. Diagnosing 2D symmetry protected topological states via mixed state anomaly

    cond-mat.str-el 2025-06 conditional novelty 6.0 of 10

    The RDM of a 2D Z2 SPT state acts as a 1D anomalous mixed state whose twisted disorder parameter contains a quantized topological constant (D=4 with time reversal) and supports symmetry-breaking-type long-range order.

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