Entanglement Dynamics of two Non-Hermitian Qubits

• URL: http://arxiv.org/abs/2308.16079v1
• Date: Wed, 30 Aug 2023 15:04:31 GMT
• Title: Entanglement Dynamics of two Non-Hermitian Qubits
• Authors: Yi-Xi Zhang, Zhen-Tao Zhang, Xiao-Zhi Wei, Bao-Long Liang, Feng Mei, and Zhen-Shan Yang
• Abstract summary: In this paper, we investigate the entanglement dynamics of two coupled and driven non-Hermitian qubits. We find that the evolution of the bipartite entanglement manifests two distinct patterns in the parameter space.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The evolution of entanglement in a non-Hermitian quantum system may behave differently compared to its Hermitian counterpart. In this paper, we investigate the entanglement dynamics of two coupled and driven non-Hermitian qubits. Through calculating the concurrence of the system, we find that the evolution of the bipartite entanglement manifests two distinct patterns in the parameter space. In the low non-Hermiticity regime, the concurrence oscillates significantly, while in the opposite regime the same quantity would trend to a stable value. We attribute this phenomenon to parity-time ($ \mathcal{PT}$) symmetry phase transition. In addition, we have also studied the effect of decoherence on the entanglement dynamics. Our research provides a method to stabilize entanglement by exploiting non-Hermiticity.

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