Frontiers of quantum physics

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How much of one-way computation is just thermodynamics?

(2007)

Authors:

Janet Anders, Damian Markham, Vlatko Vedral, Michal Hajdušek
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Optomechanical entanglement between a movable mirror and a cavity field.

Phys Rev Lett 98:3 (2007) 030405

Authors:

D Vitali, S Gigan, A Ferreira, HR Böhm, P Tombesi, A Guerreiro, V Vedral, A Zeilinger, M Aspelmeyer

Abstract:

We show how stationary entanglement between an optical cavity field mode and a macroscopic vibrating mirror can be generated by means of radiation pressure. We also show how the generated optomechanical entanglement can be quantified, and we suggest an experimental readout scheme to fully characterize the entangled state. Surprisingly, such optomechanical entanglement is shown to persist for environment temperatures above 20 K using state-of-the-art experimental parameters.
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Quantumness without quantumness: entanglement as classical correlations in higher dimensions

(2007)
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Witnessing Macroscopic Entanglement in a Staggered Magnetic Field

(2007)

Authors:

Jenny Hide, Wonmin Son, Ian Lawrie, Vlatko Vedral
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Can entanglement be extracted from many body systems?

International Journal of Quantum Information 5:1-2 (2007) 125-130

Authors:

G De Chiara, C Brukner, GM Palma, R Fazio, V Vedral

Abstract:

Some thermodynamical properties of solids, such as heat capacity and magnetic susceptibility, have recently been shown to be linked to the amount of entanglement in a solid. Until now, however, it was not clear whether this entanglement can be used as a resource in quantum information theory. Here we show that this entanglement is physical, demonstrating the principles of its extraction from a typical spin chain by scattering two particles off the system. Moreover, we show how to simulate this process using present-day optical lattice technology. © 2007 World Scientific Publishing Company.
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