Quantum discord between relatively accelerated observers
By Animesh Datta. 2009
146 citations recorded by the source corpus.
We calculate the quantum discord between two free modes of a scalar field, which start in a maximally entangled state and then undergo a relative constant acceleration. In a regime where there is no distillable entanglement due to the Unruh effect, we show that there is a finite amount of quantum discord, which is a measure of purely quantum correlations in a state over and above quantum entanglement. Even in the limit of infinite acceleration of the observer detecting one of the modes, we provide evidence for a nonzero amount of purely quantum correlations. We discuss our result in the context of secure quantum communications involving eavesdroppers in noninertial frames.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/974046333377d460139abc85550fee188b8e74a2
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- The classical-quantum boundary for correlations: Discord and related measures (2011, result): “(Datta, 2009) compares the degradation of entanglement to that of discord and MID.”
- Quantum coherence and geometric quantum discord (2017, background): “It is also an important concept in quantum information science (Brandão and Datta, 2011; Buscemi and Datta, 2010; Datta, 2009b,c).”