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Connection between the N00N State and a superposition of SU(2) Coherent States

The N00N state, which was introduced as a resource for quantum-enhanced metrology, is in fact a special case of a superposition of two SU(2) coherent states. We show here explicitly the derivation of the N00N state from the superposition state. This derivation makes clear the connection between these seemingly disparate states as well as shows how the N00N state can be generalized to a superposition of SU(2) coherent states.

preprint2014arXivOpen access
Barry C. SandersChristopher C. Gerry
quant-ph
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Barry C. SandersChristopher C. Gerry

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