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6 papers · 2 filters
Deterministic teleportation using single-photon entanglement as a resource
Gunnar Björk, Amine Laghaout, Ulrik L. Andersen
We outline a proof that teleportation with a single particle is in principle just as reliable as with two particles. We thereby hope to dispel the skepticism surrounding single-pho…
Realistic limits on the nonlocality of an N-partite single-photon superposition
Amine Laghaout, Gunnar Björk, Ulrik L. Andersen
A recent paper [L. Heaney, A. Cabello, M. F. Santos, and V. Vedral, New Journal of Physics, 13, 053054 (2011)] revealed that a single quantum symmetrically delocalized over N modes…
Continuous variable quantum key distribution with two-mode squeezed states
Lars S. Madsen, Vladyslav C. Usenko, Mikael Lassen +2
Quantum key distribution (QKD) enables two remote parties to grow a shared key which they can use for unconditionally secure communication [1]. The applicable distance of a QKD pro…
Feedback Enhanced Sensitivity in Optomechanics: Surpassing the Parametric Instability Barrier
Glen I. Harris, Ulrik L. Andersen, Joachim Knittel +1
The intracavity power, and hence sensitivity, of optomechanical sensors is commonly limited by parametric instability. Here we characterize the parametric instability induced sensi…
Probabilistic Cloning of Coherent States without a Phase Reference
Christian R. Müller, Christoffer Wittmann, Petr Marek +4
We present a probabilistic cloning scheme operating independently of any phase reference. The scheme is based solely on a phase-randomized displacement and photon counting, omittin…
Experimental demonstration of a Hadamard gate for coherent state qubits
Anders Tipsmark, Ruifang Dong, Amine Laghaout +3
We discuss and experimentally demonstrate a probabilistic Hadamard gate for coherent state qubits. The scheme is based on linear optical components, non-classical resources and the…