Non-Markovian effects on quantum-communication protocols

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.032340· OSTI ID:21448678

Yeo, Ye; Oh, C H ^[1]; An, Jun-Hong ^[1]

---

1. Centre for Quantum Technologies and Department of Physics, National University of Singapore, 3 Science Drive 2, Singapore 117543 (Singapore)

We show how, under the influence of non-Markovian environments, two different maximally entangled Bell states give rise to states that have equal classical correlations and the same capacities to violate the Bell-Clauser-Horne-Shimony-Holt inequality, but intriguingly differing usefulness for teleportation and dense coding. We elucidate how different entanglement measures like negativity and concurrence, and two different measures of quantum discord, could account for these behaviors. In particular, we explicitly show how the Ollivier-Zurek measure of discord directly accounts for one state being a better resource for dense coding compared to another. Our study leads to several important issues about these measures of discord.

• OSTI ID: 21448678
• Journal Information: Physical Review. A, Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevA.82.032340; (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
CAPACITY
CORRELATIONS
DATA TRANSMISSION
MARKOV PROCESS
QUANTUM CRYPTOGRAPHY
QUANTUM ENTANGLEMENT
QUANTUM STATES
QUANTUM TELEPORTATION
COMMUNICATIONS
CRYPTOGRAPHY
STOCHASTIC PROCESSES