Entangled coherent states: teleportation and decoherence

Details Entangled coherent states: teleportation and decoherence Entangled coherent states: teleportation and decoherence

2000-12-17

arxiv.org/abs/quant-ph/0012086v1

Phys. Rev. A 64, 022313 (2001)

Physics

Quantum Physics

11 pages LaTeX, 3 eps figures. Submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.64.022313

When a superposition $(|\alpha>-|-\alpha>)$ 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 $\alpha$, 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 Schr\"odinger cat states

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