Frontiers of quantum physics

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Experimental demonstration of a unified framework for mixed-state geometric phases

EPL 94:2 (2011)

Authors:

J Zhu, M Shi, V Vedral, X Peng, D Suter, J Du

Abstract:

Geometric phases have been found in every major branch of physics and play an important role in mathematics and quantum computation. Here, we unify two proposed definitions of the geometric phase in mixed states - Uhlmann's phase and Sjöqvist's phase - in a new formalism based on interferometry and further provide an experimental demonstration in NMR. This is also the first experimental measurement of Uhlmann's geometric phase. © 2011 Europhysics Letters Association.
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Quantum phase transition between cluster and antiferromagnetic states

(2011)

Authors:

Wonmin Son, Luigi Amico, Rosario Fazio, Alioscia Hamma, Saverio Pascazio, Vlatko Vedral
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Quantum Processes, Systems, and Information, by Benjamin Schumacher and Michael Westmoreland

Contemporary Physics Taylor & Francis 52:2 (2011) 168-168
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Global asymmetry of many-qubit correlations: A lattice gauge theory approach

(2011)

Authors:

Mark S Williamson, Marie Ericsson, Markus Johansson, Erik Sjoqvist, Anthony Sudbery, Vlatko Vedral
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Geometric local invariants and pure three-qubit states

(2011)

Authors:

Mark S Williamson, Marie Ericsson, Markus Johansson, Erik Sjoqvist, Anthony Sudbery, Vlatko Vedral, William K Wootters
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