Precision Measurements Using Squeezed Spin States via Two-axis Counter-twisting Interactions
arXiv:1410.4640 · doi:10.1103/PhysRevA.90.062132
Abstract
We show that the two-axis counter twisting interaction squeezes a coherent spin state into three states of interest in quantum information, namely, the twin-Fock state, the equally-weighted superposition state, and the state that achieves the Heisenberg limit of optimal sensitivity defined by the Cramer-Rao inequality in addition to the well-known Heisenberg-limited state of spin fluctuations.
5 pages, 3 figures
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