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Entanglement dynamics under decoherence: from qubits to qudits

โœ Scribed by A. R.R. Carvalho; F. Mintert; S. Palzer; A. Buchleitner


Book ID
111628187
Publisher
Springer
Year
2006
Tongue
English
Weight
206 KB
Volume
41
Category
Article
ISSN
1434-6060

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We study the decoherence dynamics of a qubit coupled to a quantum two-level system (TLS) in addition to its weak coupling to a background environment. We analyze the different regimes of behaviour that arise as the values of the different parameters are varied. We classify those regimes as two weak-

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## Abstract We discuss a specific entanglement distillation scheme [D. Deutsch et al., Phys. Rev. Lett. **77**, 2818 (1996)] under the constraint of finite samples of entangled qubit pairs. It is shown that an iterative process based on this method can be explicitly formulated. The average fidelity