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- Centre National de la Recherche ScientifiqueFR208 papers
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6 papers · 2 filters
Why am I me? and why is my world so classical?
Anthony Sudbery
This is an attempt to apply Nagel's distinction between internal and external statements to the interpretation of quantum mechanics. I propose that this distinction resolves the co…
Diese verdammte quantenspringerei
Anthony Sudbery
It is argued that the conventional formulation of quantum mechanics is inadequate: the usual interpretation of the mathematical formalism in terms of the results of measurements ca…
Multipartite generalisation of the Schmidt decomposition
H. A. Carteret, A. Higuchi, A. Sudbery
We find a canonical form for pure states of a general multipartite system, in which the constraints on the coordinates (with respect to a factorisable orthonormal basis) are simply…
How entangled can two couples get?
A. Higuchi, A. Sudbery
We describe a pure state of four qubits whose single-qubit density matrices are all maximally mixed and whose average entanglement as a system of two pairs of qubits appears to be…
On local invariants of pure three-qubit states
Anthony Sudbery
We study invariants of three-qubit states under local unitary transformations, i.e. functions on the space of entanglement types, which is known to have dimension 6. We show that t…
Local symmetry properties of pure 3-qubit states
H A Carteret, A Sudbery
Entanglement types of pure states of 3 qubits are classified by means of their stabilisers in the group of local unitary operations. It is shown that the stabiliser is generically…