Experimental implementation of partial symmetrization and anti-symmetrization of two-qubit states

Details Experimental implementation of partial symmetrization and anti-symmetrization of two-qubit states Experimental implementation of partial symmetrization and anti-symmetrization of two-qubit states

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11b3005c&link_type=abstract

New Journal of Physics, Volume 11, Issue 2, pp. 023005 (2009).

Physics

1

Scientific paper

We report on experimental realization of tunable two-qubit state filtering using linear optical elements. The filter enables an arbitrary attenuation of either the symmetric or anti-symmetric part of the input two-qubit state. The device uses the encoding of qubits into polarization states of single photons and its operation is based on combination of single- and two-photon interference, selective attenuation and conditional detection. The filter is very flexible and the degree of symmetrization or anti-symmetrization can be easily set by means of variable attenuators. A full quantum process tomography of implemented operations was carried out and the results confirm very good performance of the filter.

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