Frontiers of quantum physics

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Vacuum induced berry phase: Theory and experimental proposal

Journal of Modern Optics Informa UK Limited 50:6-7 (2003) 1175-1181

Authors:

Sougato Bose, Angelo Carollo, Ivette Fuentes-guridi, Marcelo França Santos, Vlatko Vedral
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GEOMETRIC PHASES AND TOPOLOGICAL QUANTUM COMPUTATION

International Journal of Quantum Information World Scientific Publishing 1:01 (2003) 1-23
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Topological Quantum Gates with Quantum Dots

(2003)

Authors:

Jiannis K Pachos, Vlatko Vedral
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Classical correlations and entanglement in quantum measurements.

Phys Rev Lett 90:5 (2003) 050401

Abstract:

We analyze a quantum measurement where the apparatus is initially in a mixed state. We show that the amount of information gained in a measurement is not equal to the amount of entanglement between the system and the apparatus, but is instead equal to the degree of classical correlations between the two. As a consequence, we derive an uncertainty-like expression relating the information gain in the measurement and the initial mixedness of the apparatus. Final entanglement between the environment and the apparatus is also shown to be relevant for the efficiency of the measurement.
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Entanglement in The Second Quantization Formalism

(2003)
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