2021/06/20 by Kh. P. Gnatenko, N. A. Susulovska
Computer Science · Physics and Astronomy · #Computer science #Data mining #Measure (data warehouse) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum computer #Quantum discord #Quantum entanglement #Quantum mechanics #Qubit #Theoretical physics #quant-ph
paper · pdf · doi:10.1209/0295-5075/ac419b
published as EPL 136 (2021) 40003
arxiv created 2021/06/20 · openalex publication_date 2021/11/01 · arxiv updated 2022/03/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Multi-qubit graph states generated by the action of controlled phase shift operators on a separable quantum state of a system, in which all the qubits are in arbitrary identical states, are examined. The geometric measure of entanglement of a qubit with other qubits is found for the graph states represented by arbitrary graphs. The entanglement depends on the degree of the vertex representing the qubit, the absolute values of the parameter of the phase shift gate, and the parameter of state the gate is acting on. Also, the geometric measure of entanglement of the graph states is quantified on the quantum computer \textrmibmq_athens. The results obtained on the quantum device are in good agreement with analytical ones.