Prof Vlatko Vedral FInstP

Abstract:

We use entanglement to investigate the transition from vortex-liquid phase to vortex-lattice phase in a weakly interacting rotating Bose-Einstein condensate. For the torus geometry, the ground-state entanglement spectrum is analyzed to distinguish these two phases. The low-lying part of the ground-state entanglement spectrum, as well as the behavior of its lowest level, changes clearly when the transition occurs. For the sphere geometry, the entanglement gap in the conformal limit is also studied. We also show that the decrease in entanglement between particles can be regarded as a signal of the transition. © 2011 American Physical Society.

Abstract:

In this paper we identify quantum entanglement, quantum discord and classical correlations as the main classes of correlations present in many body systems, such as biomolecules. We show how to witness the presene of entanglement and quantum discord. All witnesses can be accessed with simple measurements and implemented with current technology. We discuss the relationship between the speed of processing and presence of correlations and illustrate it in the case of photosynthesis and magnetoreception. © 2011 Published by Elsevier Ltd.