Spin squeezing in the Ising model - art. no. 053815

We analyze the collective spin noise in interacting spin systems. General e xpressions are derived for the short-time behavior of spin systems with gen eral spin-spin interactions, and we suggest optimum experimental conditions for the detection of spin squeezing. For Ising models with site-dependent nearest-neighbor interactions, general expressions are presented for the sp in squeezing parameter for all times. The reduction of collective spin nois e can be used to verify the entangling powers of quantum computer architect ures based on interacting spins.