A microstructured fiber source of photon pairs at widely separated wavelengths (2009)
Slater, Joshua A., Corbeil, Jean-Simon, Virally, Stephane, Bussieres, Felix, Kudlinski, Alexandre, Bouwmans, Geraud, ...
We demonstrate a source of photon pairs with widely separated wavelengths, 810 nm and 1548 nm, generated through spontaneous four-wave mixing in a microstructured fiber. The second-order...
Berlin, Guido, Brassard, Gilles, Bussieres, Felix, Godbout, Nicolas, Slater, Joshua A., Tittel, Wolfgang
Coin flipping is a cryptographic primitive in which two distrustful parties wish to generate a random bit in order to choose between two alternatives. This task is impossible to realize when it...
Quantum states prepared by realistic entanglement swapping (2009)
Scherer, Artur, Howard, Gina, Sanders, Barry C., Tittel, Wolfgang
Entanglement swapping between photon pairs is a fundamental building block in schemes using quantum relays or quantum repeaters to overcome the range limits of long distance quantum key distribution....
Proof-of-Concept of Real-World Quantum Key Distribution with Quantum Frames (2009)
Martinez, Itzel Lucio, Chan, Philip, Mo, Xiaofan, Hosier, Steve, Tittel, Wolfgang
We propose and experimentally investigate a fibre-based quantum key distribution system, which employs polarization qubits encoded into faint laser pulses. As a novel feature, it allows sending of...
Towards fast quantum key distribution with quantum frames (2008)
Martinez, Itzel Lucio, Chan, Philip, Mo, Xiaofan, Hosier, Steve, Tittel, Wolfgang
We propose and investigate a fibre-based quantum key distribution system, which employs polarization qubits encoded into faint laser pulses. As a novel feature, it allows sending of classical framing...
Fast and simple characterization of a photon pair source (2008)
Bussieres, Felix, Slater, Joshua A., Godbout, Nicolas, Tittel, Wolfgang
We present an exact model of the detection statistics of a probabilistic source of photon pairs from which a fast, simple and precise method to measure the source's brightness and photon channel...
Space-QUEST: Experiments with quantum entanglement in space (2008)
Ursin, Rupert, Jennewein, Thomas, Kofler, Johannes, Perdigues, Josep M., Cacciapuoti, Luigi, De Matos, Clovis J., ...
The European Space Agency (ESA) has supported a range of studies in the field of quantum physics and quantum information science in space for several years, and consequently we have submitted the...
Deliverable D (report, Christian Kurtsiefer, Harald Weinfurter, Hugues De Riedmatten, Wolfgang Tittel, Hugo Zbinden, ...
This report summarises the ongoing work in QuComm on fiber based entanglement quantum cryptography. Report Version: 1 Report Preparation Date: 2002-01-05 Classification: Internal Project funded by...
Staudt, Matthias U., Hastings-Simon, Sara R., Afzelius, Mikael, Jaccard, Didier, Tittel, Wolfgang, Gisin, Nicolas
We studied optical coherence properties of the 1.53 $\mu$m telecommunication transition in an Er$^{3+}$-doped silicate optical fiber through spectral holeburning and photon echoes. We find...
Hastings-Simon, Sara R., Staudt, Matthias U., Afzelius, Mikael, Baldi, Pascal, Jaccard, Didier, Tittel, Wolfgang, ...
We present measurements of the linear Stark effect on the $^{4}$I$_{15/2} \to$ $^{4}$I$_{13/2}$ transition in an Er$^{3+}$-doped proton-exchanged LiNbO$_{3}$ crystalline waveguide and an...
A photonic quantum information interface (2005)
Tanzilli, Sebastien, Tittel, Wolfgang, Halder, Matthaeus, Alibart, Olivier, Baldi, Pascal, Gisin, Nicolas, ...
Quantum communication is the art of transferring quantum states, or quantum bits of information (qubits), from one place to another. On the fundamental side, this allows one to distribute...
Oblak, Daniel, Mikkelsen, Jens K., Tittel, Wolfgang, Vershovski, Anton K., Sorensen, Jens L., Petrov, Plamen G., ...
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 a step towards...
De Riedmatten, Hugues, Scarani, Valerio, Marcikic, Ivan, Acin, Antonio, Tittel, Wolfgang, Zbinden, Hugo, ...
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 much shorter than...
Tailoring photonic entanglement in high-dimensional Hilbert spaces (2003)
De Riedmatten, Hugues, Marcikic, Ivan, Scarani, Valerio, Tittel, Wolfgang, Zbinden, Hugo, Gisin, Nicolas
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 pulses with a fixed...
Femtosecond Time-Bin Entangled Qubits for Quantum Communication (2002)
Marcikic, Ivan, De Riedmatten, Hugues, Tittel, Wolfgang, Scarani, Valerio, Zbinden, Hugo, Gisin, Nicolas
We create pairs of non-degenerate time-bin entangled photons at telecom wavelengths with ultra-short pump pulses. Entanglement is shown by performing Bell kind tests of the Franson type with...
Nicolas Gisin, Grégoire Ribordy, Wolfgang Tittel, Hugo Zbinden
Quantum cryptography could well be the first application of quantum mechanics at the individual quanta level. The very fast progress in both theory and experiments over the recent years are reviewed,...
Photonic Entanglement for Fundamental Tests and Quantum Communication (2001)
Tittel, Wolfgang, Weihs, Gregor
Entanglement is at the heart of fundamental tests of quantum mechanics like tests of Bell-inequalities and, as discovered lately, of quantum computation and communication. Their technological advance...
Gisin, Nicolas, Ribordy, Grégoire, Tittel, Wolfgang, Zbinden, Hugo
Quantum cryptography could well be the first application of quantum mechanics at the individual quanta level. The very fast progress in both theory and experiments over the recent years are reviewed,...
Nicolas Gisin Gre, Nicolas Gisin, Grégoire Ribordy, Wolfgang Tittel, Hugo Zbinden
This paper will show that in compensation for this "quantum noise," quantum mechanics allows us novel forms of coding without analogue in communication channels adequately described by...
The speed of quantum information and the preferred frame: analysis of experimental data (2000)
Scarani, Valerio, Tittel, Wolfgang, Zbinden, Hugo, Gisin, Nicolas
The results of EPR experiments performed in Geneva are analyzed in the frame of the cosmic microwave background radiation, generally considered as a good candidate for playing the role of preferred...
Quantum correlation for quantum communication / (2000)
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