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Remote Preparation of Single-Photon "Hybrid" Entangled and Vector-Polarization States
Julio T. Barreiro, Tzu-Chieh Wei, Paul G. Kwiat
Quantum teleportation faces increasingly demanding requirements for transmitting large or even entangled systems. However, knowledge of the state to be transmitted eases its recons…
Beating the channel capacity limit for linear photonic superdense coding
Julio T. Barreiro, Tzu-Chieh Wei, Paul G. Kwiat
Dense coding is arguably the protocol that launched the field of quantum communication. Today, however, more than a decade after its initial experimental realization, the channel c…
14-qubit entanglement: creation and coherence
Thomas Monz, Philipp Schindler, Julio T. Barreiro +7
We report the creation of Greenberger-Horne-Zeilinger states with up to 14 qubits. By investigating the coherence of up to 8 ions over time, we observe a decay proportional to the…
Experimental multiparticle entanglement dynamics induced by decoherence
J. T. Barreiro, P. Schindler, O. Gühne +5
Multiparticle entanglement leads to richer correlations than two-particle entanglement and gives rise to striking contradictions with local realism, inequivalent classes of entangl…