Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Temporão, G. P."'
Autor:
Almeida, F., Sousa, I., Kremer, O., da Silva, B. Pinheiro, Tasca, D. S., Khoury, A. Z., Temporão, G., Guerreiro, T.
Publikováno v:
Phys. Rev. Lett. 131, 163601 (2023)
We experimentally demonstrate stable trapping and controlled manipulation of silica microspheres in a structured optical beam consisting of a dark focus surrounded by light in all directions - the so-called Dark Focus Tweezer. Results from power spec
Externí odkaz:
http://arxiv.org/abs/2302.01953
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
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., 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
Autor:
Xavier, G. B., Walenta, N., de Faria, G. Vilela, Temporao, G. P., Gisin, N., Zbinden, H., von der Weid, J. P.
Publikováno v:
New J. Phys. 11, 045015, 2009
In this paper we demonstrate an active polarization drift compensation scheme for optical fibres employed in a quantum key distribution experiment with polarization encoded qubits. The quantum signals are wavelength multiplexed in one fibre along wit
Externí odkaz:
http://arxiv.org/abs/0905.0394