Properties of entanglement in the cluster of N-qubits

Abstract

In this study, we analyzed the properties of entanglement in the ground state of an [Formula: see text]-qubit cluster. For the first time, we discussed the previously overlooked relation between spin squeezing and concurrence for a multi-qubit system, and critically explained the special value of parameter [Formula: see text] at which the concurrence becomes 0. Additionally, this work also elaborates on the relation between decay probability and concurrence for the multiple numbers of qubits. Results showed that when the number of qubits is high, the decay is sharp as compared to the small number of qubits, which indicates that entanglement dies faster at a higher number of qubits.