Abstract
We study the evolution of quantum correlations, quantified by the geometric discord, of two excitonic quantum-dot qubits under the influence of the phonon environment. We show that the decay of these correlations differs substantially from the decay of entanglement. Instead of displaying sudden-death-type behavior, the geometric discord shows a tendency to undergo transitions between different types of decay, is sensitive to nonlocal phase factors, and may already be enhanced by weak environment-mediated interactions. Hence, two-qubit quantum correlations are more robust under decoherence processes, while showing a richer and more complex spectrum of behavior under unitary and nonunitary evolution
Authors (3)
Cite as
Full text
- Publication version
- Accepted or Published Version
- License
- Copyright (2013 American Physical Society)
Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
PHYSICAL REVIEW A
no. 87,
edition 6,
pages 1 - 5,
ISSN: 2469-9926 - Language:
- English
- Publication year:
- 2013
- Bibliographic description:
- Roszak k., Mazurek P., Horodecki P.: Anomalous decay of quantum correlations of quantum-dot qubits// PHYSICAL REVIEW A. -Vol. 87, iss. 6 (2013), s.1-5
- Verified by:
- Gdańsk University of Technology
seen 114 times
Recommended for you
Analytical progress on symmetric geometric discord: Measurement-based upper bounds
- A. Miranowicz,
- P. Horodecki,
- R. Chhajlany
- + 2 authors
Progress towards a unified approach to entanglement distribution
- A. Streltsov,
- R. Augusiak,
- M. Demianowicz
- + 1 authors
Sensitivity of entanglement decay of quantum-dot spin qubits to the external magnetic field
- P. Mazurek,
- K. Roszak,
- R. W. Chhajlany
- + 1 authors