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Entangled coherent states: teleportation and decoherence

S. J. van Enk·O. Hirota
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Abstract

When a superposition $(|α>-|-α>)$ of two coherent states with opposite phase falls upon a 50-50 beamsplitter, the resulting state is entangled. Remarkably, the amount of entanglement is exactly 1 ebit, irrespective of $α$, as was recently discovered by O. Hirota and M. Sasaki. Here we discuss decoherence properties of such states and give a simple protocol that teleports one qubit encoded in Schrödinger cat states

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S. J. van Enk, O. Hirota. 2000-12-17. Entangled coherent states: teleportation and decoherence. https://doi.org/10.1103/physreva.64.022313

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