Demonstration of quantum telecloning of optical coherent states

Abstract

Quantum cryptography promises in-principle secure communication between two parties via a quantum channel, with the ability to discover eavesdropping when it occurs. In 1999, a telecloning protocol was invented [M. Murao {\it et al}., Phys. Rev. A {\bf 59}, 156 (1999)] that provides a way for an eavesdropper to remotely monitor a quantum cryptographic channel such that even if eavesdropping is discovered, the identity and location of the eavesdropper is guaranteed uncompromised. Here we demonstrate unconditional telecloning experimentally for the first time. We symmetrically teleclone coherent states of light, achieving a fidelity for each clone of $F=0.58\pm 0.01$.

arXiv comment5 pages, 3 figures

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• Quantum Correlation Sharing: A Review On Recent Progress From Nonlocality To Other Non-Classical Correlations
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• Demonstration of reversible phase-insensitive optical amplifier
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• Optimal multicopy asymmetric Gaussian cloning of coherent states
• Fundamental quantum limits for practical devices
• Intensity correlations and entanglement by frequency doubling in a dual ported resonator
• Rating the performance of noisy teleportation using fluctuations in fidelity
• Geometric characterization of separability and entanglement in pure Gaussian states by single-mode unitary operations
• Qubit Movement-Assisted Entanglement Swapping
• How efficient is transport of quantum cargo through multiple highways?
• Systematic entanglement concentration for unknown less-entangled three-photon W states
• Amplification uncertainty relation for probabilistic amplifiers
• No-cloning theorem in thermofield dynamics
• Temperature effects on quantum cloning of states and entanglement
• Optimized Telecloning Circuits: Theory and Practice of Nine NISQ Clones
• Nonclassical resource for continuous variable telecloning with non-Gaussian advantage
• A Low Complexity Scheme for Entanglement Distributor Buses
• Nondestructive verification of continuous-variable entanglement
• Scalable multimode entanglement based on efficient squeezing of propagation eigenmodes
• Recycling the resource: Sequential usage of shared state in quantum teleportation with weak measurements