Two-axis two-spin squeezed states
Jonas Kitzinger, Manish Chaudhary, Manikandan Kondappan, Valentin Ivannikov, Tim Byrnes · Physical Review Research · 2020
This paper examines the properties of the states generated by the two-spin generalization of the two-axis countertwisting Hamiltonian. The spin squeezing produces correlations for arbitrary spin directions, and can violate the Bell-CHSH inequality with quadratic spin correlators