Experimental quantum cryptography with qutrits

By S. Groeblacher, T. Jennewein, Alipasha Vaziri, Gregor Weihs, Anton Zeilinger. 2005

377 citations recorded by the source corpus.

We produce two identical keys using, for the first time, entangled trinary quantum systems (qutrits) for quantum key distribution. The advantage of qutrits over the normally used binary quantum systems is an increased coding density and a higher security margin. The qutrits are encoded into the orbital angular momentum of photons, namely Laguerre–Gaussian modes with azimuthal index l + 1, 0 and −1, respectively. The orbital angular momentum is controlled with phase holograms. In an Ekert-type protocol the violation of a three-dimensional Bell inequality verifies the security of the generated keys. A key is obtained with a qutrit error rate of approximately 10%.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/56551e851592e9ae8dc50925debf809cae298e63

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Twisted photons: new quantum perspectives in high dimensions (2017, neutral): “[76] Simon Gröblacher, Thomas Jennewein, Alipasha”
Angular diffraction (2009, neutral): “|A |2 = |ψ0|(2) ( β 2π )2 sinc(2) ( β 2 ) , (6)”
Entanglement certification from theory to experiment (2018, background): “[38] S.”
Orbital Angular Momentum States Enabling Fiber-based High-dimensional Quantum Communication (2018, methodology): “To date, high-dimensional quantum states have been implemented by exploiting position-momentum [25–27] and orbital angular momentum (OAM) [28–30] degrees of freedom, spatial modes”
Multiphoton entanglement and interferometry (2008, background): “This approach has advantages in certain quantum communication protocols (Vaziri et al., 2002, Molina-Terriza et al., 2004; Gröblacher et al., 2006).”
High-dimensional quantum cryptography with twisted light (2014, background): “Similarly, a number of studies have investigated the possibility of using OAM modes in quantum cryptography [19, 20].”
Photon temporal modes: a complete framework for quantum information science (2015, background): “[15] Simon Gröblacher, Thomas Jennewein, Alipasha Vaziri, Gregor Weihs, and Anton Zeilinger, “Experimental quantum cryptography with qutrits,” New J.”