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Quantum secret sharing with continuous-variable cluster states
- Publication Year :
- 2013
-
Abstract
- We extend the formalism of cluster state quantum secret sharing, as presented in Markham and Sanders [Phys. Rev. A 78, 042309 (2008)] and Keet et al. [Phy. Rev. A 82, 062315 (2010)], to the continuous-variable regime. We show that both classical and quantum information can be shared by distributing continuous-variable cluster states through either public or private channels. We find that the adversary structure is completely denied from the secret if the cluster state is infinitely squeezed, but some secret information would be leaked if a realistic finitely squeezed state is employed. We suggest benchmarks to evaluate the security in the finitely squeezed cases. For the sharing of classical secrets, we borrow techniques from the continuous-variable quantum key distribution to compute the secret sharing rate. For the sharing of quantum states, we estimate the amount of entanglement distilled for teleportation from each cluster state.<br />v3: Modified abstract and introduction
- Subjects :
- Physics
Discrete mathematics
Quantum Physics
Cluster state
FOS: Physical sciences
Quantum entanglement
Quantum key distribution
01 natural sciences
Atomic and Molecular Physics, and Optics
010305 fluids & plasmas
Quantum cryptography
Quantum state
Quantum mechanics
0103 physical sciences
Quantum information
010306 general physics
Quantum information science
Quantum Physics (quant-ph)
Squeezed coherent state
Computer Science::Cryptography and Security
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....274415543c076f07cfddf7ef28acffe8