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Quantum versus Classical Domains for Teleportation with Continuous Variables
Samuel L. Braunstein, Christopher A. Fuchs, H. J. Kimble +1
Fidelity F{classical} = 1/2 has been established as setting the boundary between classical and quantum domains in the teleportation of coherent states of the electromagnetic field…
Information Tradeoff Relations for Finite-Strength Quantum Measurements
Christopher A. Fuchs, Kurt Jacobs
In this paper we give a new way to quantify the folklore notion that quantum measurements bring a disturbance to the system being measured. We consider two observers who initially…
Entanglement of Formation of an Arbitrary State of Two Rebits
Carlton M. Caves, Christopher A. Fuchs, Pranaw Rungta
We consider entanglement for quantum states defined in vector spaces over the real numbers. Such real entanglement is different from entanglement in standard quantum mechanics over…
On quantum coding for ensembles of mixed states
Howard Barnum, Carlton M. Caves, Christopher A. Fuchs +2
We consider the problem of optimal asymptotically faithful compression for ensembles of mixed quantum states. Although the optimal rate is unknown, we prove upper and lower bounds…