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Acta Physica Sinica

Displaced Excited Squeezed Vacuum States and Their Propertities

Sun Zhi-Hu, Fan Hong-Yi, 中国科学技术大学材料科学与工程系，合肥　230026

Published Jan 1, 2000• 5 citations

Abstract

We introduce the states D(z)a\+\{+\+m\}S(r)|0〉 and examine their properties . Such states are checked to be complete vectors via the IWOP (Integration W ithin an Ordered Product of operators) technique. We find larger－scale macrosco pic oscillations of photon distribution after the squeezed vacuum states being e xcited and displaced. On contrary to the bunching photons of the squeezed vacuum states as the displacing parameter |z| and the excitation number m are both small photons coherence can exhibit antibunching effect. The quasi－proba bility distribution functions (Husimi Q( 醆+*) function and Wigner W(q p) function) are derived and their dependences on the three parameters (z m r) are discussed. The Wigner function obviously displays their nonclassical fe ature.

DOI: 10.7498/aps.49.74

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