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Experimental demonstration of universal symmetric quantum telecloning
S. Gaertner, J. Lau, N. Kiesel +2
Quantum telecloning is a multiparty quantum communication protocol which allows quantum information broadcasting. It can be, therefore, seen as a generalization of quantum teleport…
State-independent quantum contextuality with single photons
Elias Amselem, Magnus Radmark, Mohamed Bourennane +1
We present an experimental state-independent violation of an inequality for noncontextual theories on single particles. We show that 20 different single-photon states violate an in…
Experimental high fidelity six-photon entangled state for telecloning protocols
Magnus Radmark, Marek Zukowski, Mohamed Bourennane
We experimentally generate and characterize a six-photon polarization entangled state, which is usually called "Psi 6 +". This is realized with a filtering procedure of triple emis…
Experimental test of rotational invariance and entanglement of photonic six-qubit singlet state
Magnus Radmark, Marek Zukowski, Mohamed Bourennane
We experimentally test invariance properties of the six-photonic-qubits generalization of a singlet state. Our results clearly corroborate with theory. The invariance properties ar…
Experimental filtering of two-, four-, and six-photon singlets from single PDC source
Magnus Radmark, Marcin Wiesniak, Marek Zukowski +1
Invariant entangled states remain unchanged under simultaneous identical unitary transformations of all their subsystems. We experimentally generate and characterize such invariant…
Interference contrast in multi-source few photon optics
Wieslaw Laskowski, Marcin Wiesniak, Marek Zukowski +2
Many recent experiments employ several parametric down conversion (PDC) sources to get multiphoton interference. Such interference has applications in quantum information. We study…