Abstract
Embedding spins in a line shape (line embedding) with cluster density matrix embedding theory (CDMET) is used to study distant spin correlations and entanglement entropy in the quantum spin liquid (QSL) of the spin‐1/2 J1–J2–J3 Heisenberg model on the honeycomb lattice. It is found that, in the QSL, the reduced density matrix of two distantly separated spins is close to the direct product of the two reduced density matrices, which respectively belong to these two spins. This means that the spin correlations between these two distantly separated spins are vanishing. The QSL has short‐range Néel‐like order but loses long‐range orders. The spin expectation values in the QSL are very small. Distant spin correlations, which are sensitive to phase transitions, indicate that the QSL is isotropic. The QSL has a highly entangled ground state.
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