Improving fidelity of continuous-variable teleportation via local operations

Abstract

We study the Braunstein-Kimble setup for teleportation of quantum state of a single mode of optical field. We assume that the sender and receiver share a two-mode Gaussian state and we identify optimum local Gaussian operations that maximize the teleportation fidelity. We consider fidelity of teleportation of pure Gaussian states and we also introduce fidelity of the teleportation transformation. We show on an explicit example that in some cases the optimum local operation is not a simple unitary symplectic transformation but some more general completely positive map.

8 pages, 2 figures, added references

References in corpus (5)

• Experimental quantum teleportation
• Continuous-variable quantum teleportation through lossy channels
• Gain tuning and fidelity in continuous variable quantum teleportation
• Quantum channel of continuous variable teleportation and nonclassicality of quantum states
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• Optimal secure quantum teleportation of coherent states of light
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