Quantum cryptography with 3-state systems.
TLDR
This work considers quantum cryptographic schemes where the carriers of information are 3-state particles and one protocol uses four mutually unbiased bases and appears to provide better security than obtainable with 2-state carriers.Abstract:
We consider quantum cryptographic schemes where the carriers of information are 3-state particles. One protocol uses four mutually unbiased bases and appears to provide better security than obtainable with 2-state carriers. Another possible method allows quantum states to belong to more than one basis. Security is not better, but many curious features arise.read more
Citations
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Journal ArticleDOI
Quantum Cryptography
TL;DR: The author revealed that quantum teleportation as “Quantum one-time-pad” had changed from a “classical teleportation” to an “optical amplification, privacy amplification and quantum secret growing” situation.
Journal ArticleDOI
The security of practical quantum key distribution
Valerio Scarani,Helle Bechmann-Pasquinucci,Nicolas J. Cerf,Miloslav Dušek,Norbert Lütkenhaus,Momtchil Peev +5 more
TL;DR: Essential theoretical tools that have been developed to assess the security of the main experimental platforms are presented (discrete- variable, continuous-variable, and distributed-phase-reference protocols).
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Entanglement of the orbital angular momentum states of photons
TL;DR: This work demonstrates entanglement involving the spatial modes of the electromagnetic field carrying orbital angular momentum, which provides a practical route to entangled states that involves many orthogonal quantum states, rather than just two Multi-dimensional entangled states could be of considerable importance in the field of quantum information, enabling, for example, more efficient use of communication channels in quantum cryptography.
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Advances in optical angular momentum
TL;DR: The concept of orbital angular momentum is now leading to new understanding of a wide range of phenomena, including fundamental processes in Bose-Einstein condensates, while the associated technologies have led to new applications in optical tweezing and microscopy as mentioned in this paper.
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Quantum secure direct communication with high-dimension quantum superdense coding
TL;DR: A protocol that combines the ideas of block transmission, the ping-pong quantum secure direct communication protocol, and quantum superdense coding has the advantage of being secure and of high source capacity.
References
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Book
Quantum Theory: Concepts and Methods
Asher Peres,Leslie E. Ballentine +1 more
TL;DR: In this article, the authors introduce the concept of complex vector space and describe a set of properties of composite systems, including Bell's Theorem, and the notion of spacetime symmetry.