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Composite geometric phase for multipartite entangled states

Abstract:

When an entangled state evolves under local unitaries, the entanglement in the state remains fixed. Here we show that the dynamical phase acquired by an entangled state in such a scenario can always be understood as the sum of the dynamical phases of its subsystems. In contrast, the equivalent statement for the geometric phase is not generally true unless the state is separable. For an entangled state an additional term is present, the mutual geometric phase, that measures the change the addi...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevA.76.032115

Authors


Williamson, MS More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
Journal:
PHYSICAL REVIEW A
Volume:
76
Issue:
3
Publication date:
2007-09-05
DOI:
EISSN:
1094-1622
ISSN:
1050-2947
URN:
uuid:d28781d4-2007-46c3-aa9a-750a2ef494f4
Source identifiers:
157946
Local pid:
pubs:157946
Language:
English

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