We study the Zeeman effect on entanglement of non-equilibrium finite-spin systems with external fields using a method based on thermofield dynamics (TFD). For this purpose, the extended density matrices and extended entanglement entropies of two systems with either non-competing or competing external fields are calculated according to the dissipative von Neumann equation, and the numerical results are compared. Consequently, through the ``twin-peaks'' oscillations of the quantum entanglement, we have illustrated the Zeeman effect on the entanglement of non-equilibrium finite-spin systems with competing external fields in the TFD algorithm.
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Zeeman effects on the entanglement of non-equilibrium finite-spin systems
Published: 20 November 2017 by MDPI in 4th International Electronic Conference on Entropy and Its Applications session Statistical Physics
Keywords: Entanglement entropy, Thermofield dynamics, Extended density matrix, Equilibrium and non-equilibrium finite-spin systems, Dissipative von Neumann equation, Zeeman effect