Extracting an arbitrary relative phase from a multiqubit two-component entangled state

Details Extracting an arbitrary relative phase from a multiqubit two-component entangled state Extracting an arbitrary relative phase from a multiqubit two-component entangled state

2005-05-26

arxiv.org/abs/quant-ph/0505201v1

Physical Review A 72, 014306 (2005)

Physics

Quantum Physics

4 pages, REVTEX, accepted by Physical Review A

Scientific paper

10.1103/PhysRevA.72.014306

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.

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