Localized closed timelike curves can perfectly distinguish quantum states.

@article{Brun2009LocalizedCT,
  title={Localized closed timelike curves can perfectly distinguish quantum states.},
  author={T. Brun and J. Harrington and M. Wilde},
  journal={Physical review letters},
  year={2009},
  volume={102 21},
  pages={
          210402
        }
}
We show that qubits traveling along closed timelike curves are a resource that a party can exploit to distinguish perfectly any set of quantum states. As a result, an adversary with access to closed timelike curves can break any prepare-and-measure quantum key distribution protocol. Our result also implies that a party with access to closed timelike curves can violate the Holevo bound. 
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References

SHOWING 1-10 OF 14 REFERENCES
Quantum Computation and Quantum Information
  • 11,980
  • PDF
Phys
  • Rev. D 44, 3197
  • 1991
Phys
  • Rev. A 76, 012336
  • 2007
Phys
  • Rev. Lett. 96, 250401
  • 2006
Phys
  • Rev. Lett. 92, 057901
  • 2004
Phys
  • Rev. A 70, 032309
  • 2004
Quantum Computation and Quantum Information (Cambridge
  • 2000
Phys
  • Rev. Lett. 81, 3992
  • 1998
...
1
2
...