Nonclassical Effects in the Photon-Added Squeezing-Enhanced Vacuum State

Photon-added squeezing-enhanced vacuum state (PASEVS) is introduced. We analyze the nonclassical effects in the PASEVS, such as Q-function, photon-number distribution and second-order function, etc. For the PASEVS, it shows that the degree of the squeezing increases with the parameter r and reaches to the maximum degree of squeezing ?1 quickly. The Wigner functions of the PASEVS are also discussed. Furthermore, the production of the PASEVS is also given experimentally.