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Quantum
Information and Computation
ISSN: 1533-7146
published since 2001
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Vol.3 No.6 November 2003 |
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An
observable measure of entanglement for pure states of multi-qubit
systems
(pp619-626)
G. Brennen
doi:
https://doi.org/10.26421/QIC3.6-5
Abstracts:
Recently, Meyer and Wallach [Meyer and Wallach (2002), J.
of Math. Phys., 43, pp. 4273] proposed a measure of multi-qubit
entanglement that is a function on pure states. We find that this
function can be interpreted as a physical quantity related to the
average purity of the constituent qubits and show how it can be observed
in an efficient manner without the need for full quantum state
tomography. A possible realization is described for measuring the
entanglement of a chain of atomic qubits trapped in a 3D optical
lattice.
Key words:
entanglement |
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