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Stephen Barnett

Professor Stephen Barnett

Professor Stephen Barnett

Research Fellow

Grants awarded

Quantum Theory for Information Processing

Scheme: Wolfson Research Merit Awards

Organisation: University of Strathclyde

Dates: Jun 2007-Nov 2012

Value: £90,000

Summary: As information technology progresses, the fundamental components get ever smaller. In the very near future it will be necessary to engineer devices on the atomic scale. Far from being a disadvantage, the inevitable quantum effects have been shown to be the key to unlocking information processing with both a speed and an efficiency undreamed of with existing machines and communications that are both fast and intrinsically secure. A key enabling component of quantum information science is the ability to prepare and manipulate so-called entangled states, that is states of two or more quantum objects that appear to influence each other even after they have been separated. It is such states that, more than anything else, led Einstein to object to quantum theory and so they are of both fundamental and practical interest. I am fortunate to be able to work with Prof. Miles Padgett (another Wolfson Research Merit Award holder) from Glasgow University. This means that we can tackle both the theoretical and experimental challenges of real-world entangled light. This year we have completed our construction fo a detailed theoretical model of sources of entangled light and shown, remarkably, that an ultra-high bit rate, secure quantum communication system should be possible. A prototype is currently under construction in the lab of Prof. Kwiat (our collaborator from Illinois).

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