| 1 | Local sum uncertainty relations for angular momentum operators of bipartite permutation symmetric systems显示文摘We show that violation of the variance based local sum uncertainty relation(LSUR)for angular momentum operators of a bipartite system,proposed by Hofmann and Takeuchi[Phys.Rev.A 68032103(2003)],reflects entanglement in the equal bipartitions of an N-qubit symmetric state with even qubits.We establish the one-to-one connection with the violation of LSUR with negativity of covariance matrix[Phys.Lett.A 364203(2007)]of the two-qubit reduced system of a permutation symmetric N-qubit state. | I Reena H S Karthik J Prabhu Tej Sudha A R Usha Devi A K Rajagopal | 2022 | Chinese Physics B2022，31，6： | 1 |
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