Subsystem purity as an enforcer of entanglement.
TLDR
It is shown that entanglement can always arise in the interaction of an arbitrarily large system in any mixed state with a single qubit in a pure state, and the time and temperature variation of a lower bound on the amount of entanglements produced is found.Abstract:
We show that entanglement can always arise in the interaction of an arbitrarily large system in any mixed state with a single qubit in a pure state. This small initial purity is enough to enforce entanglement even when the total entropy is close to maximum. We demonstrate this feature using the Jaynes-Cummings interaction of a two-level atom in a pure state with a field in a thermal state at an arbitrarily high temperature. We find the time and temperature variation of a lower bound on the amount of entanglement produced and study the classical correlations quantified by the mutual information.read more
Citations
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Entanglement in many-body systems
TL;DR: In this article, the properties of entanglement in many-body systems are reviewed and both bipartite and multipartite entanglements are considered, and the zero and finite temperature properties of entangled states in interacting spin, fermion and boson model systems are discussed.
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Entanglement dynamics of two independent qubits in environments with and without memory
TL;DR: In this paper, the authors analyzed the dynamics of two-qubit entanglement, when the two qubits are initially in a mixed extended Werner-like state and each of them is in a zero temperature non-Markovian environment.
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Dynamics of quantum correlations in two-qubit systems within non-markovian environments
TL;DR: In this paper, the authors review some of the most recent results on the dynamics of correlations in bipartite systems embedded in non-Markovian environments and briefly discuss the occurrence of revivals of quantum correlations in classical environments.
Repository
Bibliographic guide to the foundations of quantum mechanics and quantum information
TL;DR: A collection of references (papers, books, preprints, book reviews, Ph. D. thesis, patents, web sites, etc.), sorted alphabetically and classified by subject, on foundations of quantum mechanics and quantum information can be found in this article.
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Algebraic characterization of X-states in quantum information
TL;DR: In this paper, a class of two-qubit states called X-states are identified as invariants of the full su(4) algebra of two qubits and the subalgebra of seven operators.
References
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Book
Quantum Computation and Quantum Information
TL;DR: In this article, the quantum Fourier transform and its application in quantum information theory is discussed, and distance measures for quantum information are defined. And quantum error-correction and entropy and information are discussed.
Journal ArticleDOI
The role of relative entropy in quantum information theory
TL;DR: In this article, the authors show how quantum information theory extends traditional information theory by exploring the limits imposed by quantum, rather than classical, mechanics on information storage and transmission, and show that quantum computers can achieve enhanced speed over their classical counterparts using information-theoretic arguments.
Book
Information Dynamics and Open Systems: Classical and Quantum Approach
TL;DR: The aim of this book is to provide a Discussion of Information Thermodynamics and its Applications to Open Systems, as well as Specific Applications to Quantum Entropy and Quantum Channel.