Feasibility of Bell tests with W state – Niels Bohr Institute - University of Copenhagen

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Feasibility of Bell tests with W state

Entanglement of multi-qubit systems is central to quantum information and communication. It can also be of interest from a theoretical perspective in furthering tests of non-locality. An experimental scheme for such tests will be presented using the tripartite W state, whereby a single photon is entangled with two vacuum modes. The challenge, however, is that the characterization of such Fock-state qubits requires measurements in non-commuting bases. A theoretical method for performing such polyvalent projective measurements in will be worked out. Ultimately, the goal of the analysis is to assess whether Bell tests with the W are feasible given the actual performance of photodetection devices.