	Hamiltonian $\hat{H}$	$\hat{R}$	$\hat{n}$	$Ψ (x)$	States
1.	$\hat{b} ε^{*} + {\hat{b}}^{†} ε$	$\hat{b}$	${\hat{b}}^{†} \hat{b}$	$x$	Displaced
2.	${\hat{b}}^{2} ε^{*} + {\hat{b}}^{†}^{2} ε$	${\hat{b}}^{2}$	$\frac{{\hat{b}}^{†} \hat{b}}{2}$	$2 x (2 x - 1)$	Squeezed
3.	$\hat{b} \sqrt{{\hat{b}}^{†} \hat{b}} ε^{*} + \sqrt{{\hat{b}}^{†} \hat{b}} {\hat{b}}^{†} ε$	$\hat{b} {({\hat{b}}^{†} \hat{b})}^{1 / 2}$	${\hat{b}}^{†} \hat{b}$	$x^{2}$	Holstein- Primakoff
4.	${\hat{b}}_{1} {\hat{b}}_{2} ε^{*} + {\hat{b}}_{1}^{†} {\hat{b}}_{2}^{†} ε$	${\hat{b}}_{1} {\hat{b}}_{2}$	$\frac{{\hat{b}}_{1}^{†} {\hat{b}}_{1} + {\hat{b}}_{2} {\hat{b}}_{2}^{†}}{2}$	$x_{1} x_{2}$	Squeezed