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Quantum noise limited interferometric measurement of atomic noise: towards spin squeezing on the Cs clock transition
Daniel Oblak, Jens K. Mikkelsen, Wolfgang Tittel +5
We investigate theoretically and experimentally a nondestructive interferometric measurement of the state population of an ensemble of laser cooled and trapped atoms. This study is…
Two independent photon pairs versus four-photon entangled states in parametric down conversion
Hugues de Riedmatten, Valerio Scarani, Ivan Marcikic +4
We study the physics of four-photon states generated in spontaneous parametric down-conversion with a pulsed pump field. In the limit where the coherence time of the photons t_c is…
Long distance quantum teleportation in a quantum relay configuration
H. de Riedmatten, I. Marcikic, W. Tittel +3
A long distance quantum teleportation experiment with a fiber-delayed Bell State Measurement (BSM) is reported. The source creating the qubits to be teleported and the source creat…
Tailoring photonic entanglement in high-dimensional Hilbert spaces
Hugues de Riedmatten, Ivan Marcikic, Valerio Scarani +3
We present an experiment where two photonic systems of arbitrary dimensions can be entangled. The method is based on spontaneous parametric down conversion with trains of d pump pu…
Quantum communications with time-bin entangled photons: long distance quantum teleportation and quantum repeaters
N. Gisin, I. Marcikic, H. de Riedmatten +2
Using 2 km of standard telecom optical fibres, we teleport qubits carried by photons of 1310 nm wavelength to qubits in another lab carried by a photons of 1550 nm wavelength. The…
Long distance quantum teleportation of qubits from photons at 1300 nm to photons at 1550 nm wavelength
I. Marcikic, H. de Riedmatten, W. Tittel +2
Elementary 2-dimensional quantum states (qubits) encoded in 1300 nm wavelength photons are teleported onto 1550 nm photons. The use of telecommunication wavelengths enables to take…