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Displaced Excited Squeezed Vacuum States and Their Propertities

Sun Zhi-hu Fan Hong-yi

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Displaced Excited Squeezed Vacuum States and Their Propertities

Sun Zhi-hu, Fan Hong-yi
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  • 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.
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  • Published Online:  20 January 2000

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