Phys. Rev. A 72, 014306 (2005) [4 pages]Extracting an arbitrary relative phase from a multiqubit two-component entangled stateReceived 7 October 2004; published 18 July 2005 We show that an arbitrary relative phase can be extracted from a multiqubit two-component (MTC) entangled state by local Hadamard transformations and measurements along a single basis only. In addition, how to distinguish a MTC entangled state with an arbitrary entanglement degree and relative phase from a class of multiqubit mixed states is discussed. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.014306
DOI:
10.1103/PhysRevA.72.014306
PACS:
03.67.Mn, 03.65.Ud, 85.25.Dq
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