Strong coupling in the entanglement dynamics of two qubits interacting with a graphene nanodisk
Strong coupling in the entanglement dynamics of two qubits interacting with a graphene nanodisk
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DOI：
10.1063/5.0119264
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发表时间：
2022-10
影响因子：
4
通讯作者：
N. Iliopoulos;I. Thanopulos;V. Karanikolas;E. Paspalakis
中科院分区：
文献类型：
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作者：
N. Iliopoulos;I. Thanopulos;V. Karanikolas;E. Paspalakis
利用宏观量子电动力学方法研究了两个量子比特与石墨烯纳米盘相互作用的纠缠动力学。通过改变每个量子比特的自由空间衰减率，我们研究了纳米粒子和量子比特之间的耦合强度。我们发现，随着自由空间衰减率的增加，衰减拉比振荡的量子比特人口动力学的特点改变复杂的非马尔可夫动力学人口演化。这也反映在并发，在弱或中等轻物质耦合条件下，达到0.5的值，而随着耦合条件变得更强，也瞬时观察到更大的值。我们的研究结果表明，石墨烯纳米结构可以提供一个平台，实现高度纠缠的强耦合制度在纳米尺度上，量子技术的应用至关重要。
We investigate the entanglement dynamics of two qubits interacting with a graphene nanodisk using the macroscopic quantum electrodynamics method. By modifying the free-space decay rate of each qubit, we study the coupling strength between the nanoparticle and the qubits. We find that as the free-space decay rate increases, the decaying Rabi oscillations featured in the qubit population dynamics change to complex non-Markovian dynamical population evolution. This is also reflected on the concurrence, which at weak or moderate light–matter coupling conditions, attains values up to 0.5, while as the coupling conditions become stronger, larger values are also transiently observed. Our findings indicate that graphene nanostructures can provide a platform for the realization of high degree of entanglement in the strong coupling regime at the nanoscale, essential for quantum technology applications.