Zobrazeno 1 - 10
of 165
pro vyhledávání: '"von der Weid, J. P."'
Publikováno v:
Opt. Express 24, 19574 (2016)
We propose and demonstrate a technique for quantum random number generation based on the random population of the output spatial modes of a beam splitter when both inputs are simultaneously fed with indistinguishable weak coherent states. We simulate
Externí odkaz:
http://arxiv.org/abs/1608.05155
A peak in coincidence events has been observed in a modified Hong-Ou-Mandel interferometer fed with weak coherent states inside the region of overlapping wave-packets. The inversion of the usual interference pattern represented by the HOM dip is equa
Externí odkaz:
http://arxiv.org/abs/1601.08161
Interference between fully-independent faint laser sources over two 8.5-km full polarization-controlled fiber links was performed, with stable visibility of 47.8%, an essential step towards practical implementation of quantum communication protocols.
Externí odkaz:
http://arxiv.org/abs/1208.0866
Publikováno v:
Opt. Express 20, 18911-18924 (2012)
By employing real-time monitoring of single-photon avalanche photodiodes we demonstrate how two types of practical eavesdropping strategies, the after-gate and time-shift attacks, may be detected. Both attacks are identified with the detectors operat
Externí odkaz:
http://arxiv.org/abs/1208.0532
Publikováno v:
IEEE J. Quantum Electron. 47, 1251-1256 (2011)
We propose a characterization method for the overall detection efficiency, afterpulse and dark count probabilities of single-photon counting modules in real-time with simple instrumentation. This method can be applied when the module is running in it
Externí odkaz:
http://arxiv.org/abs/1207.6992
Autor:
da Silva, T. Ferreira, Vitoreti, D., Xavier, G. B., Amaral, G. C. do, Temporão, G. P., von der Weid, J. P.
Publikováno v:
Phys. Rev. A 88, 052303 (2013)
We perform a proof-of-principle demonstration of the measurement-device-independent quantum key distribution (MDI-QKD) protocol using weak coherent states and polarization-encoded qubits over two optical fiber links of 8.5 km each. Each link was inde
Externí odkaz:
http://arxiv.org/abs/1207.6345
We experimentally demonstrate that a long distance actively stabilized Mach-Zehnder fibre optical interferometer can be used to reliably implement the GV95 quantum cryptography protocol employing orthogonal states. A proof-of-principle experiment usi
Externí odkaz:
http://arxiv.org/abs/1206.2701
We experimentally stabilise the polarisation drift between the arms of an 8 km-long fibre-optical Mach-Zehnder interferometer, while simultaneously compensating the phase fluctuations. The single photons are wavelength-multiplexed with three classica
Externí odkaz:
http://arxiv.org/abs/1105.0597
Autor:
Xavier, G. B., von der Weid, J. P.
Publikováno v:
Opt. Lett. 36, 1764 (2011)
We experimentally demonstrate stable and user-adjustable single-photon interference in a 1 km long fiber- optical Mach-Zehnder interferometer, using an active phase control system with the feedback provided by a classical laser. We are able to contin
Externí odkaz:
http://arxiv.org/abs/1104.2866
Autor:
Xavier, G. B., de Faria, G. Vilela, da Silva, T. Ferreira, Temporao, G. P., von der Weid, J. P.
Publikováno v:
Microwave and Optical Technology Letters 53, 2661 (2011)
We experimentally demonstrate the compatibility of wavelength multiplexed active polarization stabilization for quantum communication in an optical fiber carrying telecom traffic. One of the feedback control channels contains a 9.953 Gb/s data stream
Externí odkaz:
http://arxiv.org/abs/0912.4433