1 GAP Optique Geneva University Quantum Communications at telecom wavelengths Nicolas Gisin Hugo Zbinden Toni Acin, Claudio Bareiro, Sylvain Fasel, J.-D. Gautier, Ivan Marcikic, Hugues de Riedmatten, Valerio Scarani, André Stefanov, Damien Stucki, Sébastien Tanzilli, Robert Thew, Wolfgang Tittel, GAP-Optique, University of Geneva Q crypto over 67 km Time-bins: high dimensions robustness of non-maximally entangled qu Q teleportation at telecom
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GAP Optique Geneva University 1 Quantum Communications at telecom wavelengths Nicolas Gisin Hugo Zbinden Toni Acin, Claudio Bareiro, Sylvain Fasel, J.-D.
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Quantum Communications attelecom wavelengths
Nicolas Gisin Hugo ZbindenToni Acin, Claudio Bareiro, Sylvain Fasel, J.-D. Gautier, Ivan Marcikic, Hugues de Riedmatten, Valerio Scarani,
André Stefanov, Damien Stucki, Sébastien Tanzilli, Robert Thew,
Wolfgang Tittel, GAP-Optique, University of Geneva
Q crypto over 67 km
Time-bins: high dimensions robustness of non-maximally entangled qubits Q teleportation at telecom
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The plug&play setup
D A P B S
L a se r
F R A P DA P D
A P DA P DPM
PM
Perfect interference (V99%) without any adjustments, since:• both pulses travel the same path in inverse order• both pulses have exactly the same polarisation thanks to FM
AliceBob
Drawback 1:Rayleigh backscattering
Drawback 2:Trojan horse attacks
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QC over 67 km, QBER 5%
+ aerial cable (in Ste Croix, Jura) !
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Company established in 2001– Spin-off from the University of Geneva
Products– Quantum Cryptography
(optical fiber system)– Quantum Random Number Generator– Single-photon detector module (1.3 m and