Nonclassical Properties of States Generated by Applying Symmetric Photon Operations to Two-Mode Entangled Coherent States

Enhancing quantum features and teleportation fidelity of two-mode non-Gaussian states using conditional measurements

“…Specifically, entanglement states form the core of Advancing new entanglement states can be achieved by employing non-Gaussian operations on the original states, which possess limited quantum correlations. The enumeration of these operations includes photon addition [8][9][10][11], photon subtraction [12,13], coherent photon subtraction [14], the combination of photon subtraction and addition [15], the superposition of photon addition and/or subtraction [16,17], Hermite polynomial excited operation [18], as well as the utilization of other conditional measurements [19]. Through these engineering techniques, various quantum features such as entanglement degree, Einstein-Podolsky-Rosen (EPR) correlation, squeezing, EPR steering, the negativity of the Wigner function, and others are augmented in comparison to the characteristics of the initial states.…”