New n-mode squeezing operator and squeezed states with standard squeezingLi-yun Hu1, 2 and Hong-yi Fan2
1 College of Physics & Communication Electronics, Jiangxi Normal University - Nanchang 330022, China
2 Department of Physics, Shanghai Jiao Tong University - Shanghai 200030, China
received 10 February 2009; accepted in final form 24 February 2009; published March 2009
published online 11 March 2009
We find that the exponential operator , Qi, Pi are, respectively, the coordinate and momentum operators, is an n-mode squeezing operator which engenders standard squeezing. By virtue of the technique of integration within an ordered product of operators we derive V's normally ordered expansion and obtain the n-mode squeezed vacuum states, its Wigner function is calculated by using the Weyl ordering invariance under similar transformations.
03.65.-w - Quantum mechanics.
42.50.-p - Quantum optics.
© EPLA 2009