Entanglement of two coupled two-level atoms

Hamid Reza Baghshahi, Mohammad Kazem Tavassoly, Mohammad Javad Faghihi

Chuan-hua Dong

Tang Shi-qing

The two-level atom is described by Pauli sign and environment is described by infinite harmonic particle thermal reservoir.We have studied the entanglement of the coupling two-level atoms which are put in the thermal radiation field.The two-level atoms′ reducible density rectangular array is obtained.We discuss the properties of entanglement by virtue of concurrence.It is shown that as the two two-level atoms are initially situated in different coherent superposition states,entanglement of atoms have obvious dissimilarity.

Lech Jakóbczyk

Andrei M. Nemilentsau, Seyyed Ali Hassani, George W. Hanson +1 more

Using the quantum master equation, we demonstrate entanglement of two-level atoms (TLAs) over graphene. Graphene, acting as a structured photonic reservoir, significantly modifies the spontaneous decay rate of a TLA, and is rigorously incorporated into the formalism through the classical electromagnetic Green dyadic. Moreover, entanglement between the TLAs can be improved compared to the vacuum case, due to coupling of the TLAs to TM surface plasmons on graphene. Dynamics of TLAs can be further controlled by graphene biasing.

A N F Aleixo, A. B. Balantekin

A class of bound-state problems which represent the coupling of a two-level atom with a two-dimensional supersymmetric system involving two shape-invariant potentials was introduced in a previous paper. We study in this second paper the quantum dynamics and the entanglement for two models with different coupling Hamiltonians.