Creating and Interpreting the Nonlocality of a Schrodinger-Cat State

First, I summarise three different types of nonlocality in quantum mechanics. Historically, the Einstein-Podolsky-Rosen (EPR) paradox motivated tests of Bell and EPR-steering nonlocalities. I then analyze these nonlocalities for several "Schrodinger cat" prototype states including superpositions of coherent states, NOON states and GHZ states. In this way, one can develop rigorous signatures for a Schrodinger cat-state, and gain insight into the interpretation of the macroscopic pointer of a measurement apparatus. I also discuss some applications of nonlocality to quantum technology and how to create and test for these nonlocalities at a mesoscopic level in opto-mechanical and cold atom BEC experiments.

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