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Updated: Nov 2, 2025

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Published on: July 11, 2025
Dynamics of quantum entanglement in a zigzag graphene nanoribbon
Xiao-Dong Tan1, Le Cui1, Ya-Feng Song1
1School of Electronic Information and Electrical Engineering, Shangluo University, Shangluo 726000, People's Republic of China.
Abstract:
We study the dynamics of entanglement between two edge spins in a zigzag graphene nanoribbon (ZGNR) which is thermalized with a reservoir at temperatureT. The results show that the entanglement evolution displays oscillating behaviors in the presence of an external magnetic field. Such oscillating behaviors of entanglement strongly depend on the field frequency and relative location between two inter-edge coupled spins. At some critical field frequencies, the entanglement exhibits a periodic structure. When the temperature is low, the oscillating patterns of entanglement are quite regular and symmetrical. When the temperature is high, the patterns of entanglement evolution occur irregular distortions due to the thermal fluctuations. However, the entanglement between two inter-edge coupled spins in ZGNR still exists a nontrivial value even at room temperature.
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