Details of Grant 

EPSRC Reference:	GR/S99297/02
Title:	Entanglement of Bose-Einstein condensates
Principal Investigator:	Dunningham, Professor JA
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department:	Physics and Astronomy
Organisation:	University of Leeds
Scheme:	Advanced Fellowship (Pre-FEC)
Starts:	01 September 2005	Ends:	30 September 2009	Value (£):	182,555
EPSRC Research Topic Classifications:	Cold Atomic Species Quantum Optics & Information
EPSRC Industrial Sector Classifications:	No relevance to Underpinning Sectors
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Panel History:
Summary on Grant Application Form
A key characteristic that distinguishes the quantum world from the world of our everyday experience is the principle of superposition. This enables a quantum object to simultaneously exist in different states. A consequence of this is that, just as correlations can exist between events in the classical world, entanglements can exist between quantum systems. These have generated a lot of interest as they are the crucial resource in quantum information processing schemes. Such schemes exploit the properties of quantum physics to achieve tasks that would not have been possible by classical means. Examples include quantum cryptography, quantum computation, and teleportation. A study of entanglement, therefore, encompasses both fundamental issues of quantum mechanics as well as holding exciting potential for technological advances. In my proposed research, I intend to draw together these elements and develop not only a deeper understanding of the role entanglements play in quantum physics, but also toconsider how entanglement may be used in practical tasks.The main strand of my research is to consider how entanglements can be used in extremely high precision measurement schemes. This work has been motivated by two major experimental advances in the past decade. The first was the realisation of Bose-Einstein condensation in dilute atomic gases. These systems consist of a large number of atoms in the same quantum state and so offer unique opportunities in multi-particle quantum state engineering. The second advance was the demonstration of the Mott insulator phase transition for condensates trapped in an optical lattice. This demonstrated how large numbers of atoms could be entangled and disentangled in a controlled fashion. Together these two developments have provided us with wonderful tools for developing practical schemes that harness entanglement to perform useful tasks. I intend to consider how these techniques can be used to make measurements of physical quantities with an accuracy deyond what can be achieved classically. In the long term, it is hoped that this research will lead to new quantum technologies.The second part of my research is concerned with more fundamental issues. I wish to study the nature of entanglement and its importance in the physical world. I am interested particularly in how we can interpret the emergence of robust relative observables from quantum mechanics in terms of entanglement. This should enable us to gain a better understanding of the boundary between the quantum and classical worlds.
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Organisation Website:	http://www.leeds.ac.uk