Details of Grant 

EPSRC Reference:	GR/T08548/01
Title:	Multi-particle entanglement in critical and distributed quantum systems
Principal Investigator:	Eisert, Professor JS
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department:	Physics
Organisation:	Imperial College London
Scheme:	EURYI
Starts:	01 February 2005	Ends:	04 February 2009	Value (£):	871,803
EPSRC Research Topic Classifications:	Quantum Optics & Information
EPSRC Industrial Sector Classifications:	No relevance to Underpinning Sectors
Related Grants:
Panel History:
Summary on Grant Application Form
Qunatum mechanical systems such as atoms or field modes of light can exhibit correlations that are in a sense stronger than attainable in classical physical systems. Entanglement, which manifests itself in such genuine quantum correlations, can indeed be viewed as the most radical and furthest departure of quantum from classical mechanics. In the field of quantum information science, entanglement is at the heart of most applications and protocols and is commonly regarded as the resource to accomplish quantum information processing tasks. The theory of entanglement aims at fleshing out this resource character, and at understanding the specific role this key ingredient plays in quantum information science. Very recently yet, it has become evident taht the methods that have been developed in the field of quantum information science may lead to significant new insights into the understanding of quantum systems embodying a large number of or infinately many constituents, for example concerning their critical behaviour. Conversely, the study of many body systems may lead to novel implications for quantum information science. This project aims at innovating tools to understand multi particle entanglement in critical and distributed systems in its various aspects. More specifically, the key aim of this research is to study distributed many body quantum systems with respect to 1) the role of quantum correlations in crical phenomena and phase transitions 2) their statistical properties 3) their potential for applications in quantum information processing and 4) the possibilities of quantum infomation applications with multi mode light.. Key steps will be the understanding of the role of superselection rules in the scaling of entanglement and correlation lengths, the establishment of an entanglement holographic principle, the development of novel measurement based quantum computation schemes thta make use of only a very restricted set of measurements and the development of new applications of quantum information science with multi mode light with quantum optical methods
Key Findings
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Organisation Website:	http://www.imperial.ac.uk