Protection of quantum information and optimal singlet conversion through higher-dimensional quantum systems and environment monitoring

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.032310· OSTI ID:21408389

Mascarenhas, E; Marques, B; Santos, M Franca ^[1]; Cavalcanti, D ^[2]; Cunha, M Terra ^[3]

---

1. Departamento de Fisica, Universidade Federal de Minas Gerais, Caixa Postal 702, 30123-970 Belo Horizonte, MG (Brazil)
2. ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona) (Spain)
3. Departamento de Matematica, Universidade Federal de Minas Gerais, Caixa Postal 702, 30123-970 Belo Horizonte, MG (Brazil)

We study how to protect quantum information in quantum systems subjected to local dissipation. We show that combining the use of three-level systems, environment monitoring, and local feedback can fully and deterministically protect any available quantum information, including entanglement initially shared by different parties. These results can represent a gain in resources and/or distances in quantum communication protocols such as quantum repeaters and teleportation as well as time for quantum memories. Finally, we show that monitoring local environments physically implements the optimum singlet conversion protocol, which is essential for classical entanglement percolation.

• OSTI ID: 21408389
• Journal Information: Physical Review. A, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevA.81.032310; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMMUNICATIONS
CONVERSION
DISTANCE
ENVIRONMENT
FEEDBACK
MONITORING
QUANTUM ENTANGLEMENT
QUANTUM INFORMATION
QUANTUM TELEPORTATION
SAFETY
INFORMATION