Two-mode excited entangled coherent states and their entanglement properties

Abstract

We introduce two types of two-mode excited entangled coherent states (TMEECSs) $|{\Psi }_{\pm }(\alpha ,m,n)>$, study their entanglement characteristics, and investigate the influence of photon excitations on quantum entanglement. It is shown that for the state $|{\Psi }_{+}(\alpha ,m,n)>$ the two-mode photon excitations affect seriously entanglement character while the the state $|{\Psi }_{-}(\alpha ,m,n)>$ is always a maximally entangled state. We show how such states can be produced by using cavity QED and quantum measurements. It is found that the entanglement amount of the TMEECSs is larger than that of the single-mode excited entangled coherent states with the same photon excitation number.

5 pages, no figure. v2: Revised version with corrections in equations and discussions

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Cited by in corpus (3)

• A class of non-classicality and non-Gaussianity of photon added three-mode GHZ-type entangled coherent states
• Two-mode photon-added entangled coherent states and their entanglement properties
• Improving entanglement of even entangled coherent states by a coherent superposition of photon subtraction and addition